solve-challenge

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Solve CTF challenges by analyzing files, connecting to services, and applying exploitation techniques. Orchestrates category-specific CTF skills.

2installs
Sourceramzxy/ctf
Added on

NPX Install

npx skill4agent add ramzxy/ctf solve-challenge

SKILL.md Content

CTF Challenge Solver

You're an expert CTF player. Your goal is to solve the challenge and capture the flag. Be aggressive and creative — try multiple approaches quickly.

Startup Sequence

  1. Parse the challenge — Extract: name, category, description, URLs, files, flag format, points/difficulty
  2. Create workspace — 
    challenges/<category>/<challenge-name>/
    with 
    README.md
    and 
    files/
  3. Fetch everything — Download files, visit URLs, connect to services (
    nc
    ), read source code
  4. Identify category — Load the right skill file: 
    .agents/skills/ctf-<category>/SKILL.md
  5. Quick wins first — 
    strings
    , 
    file
    , 
    xxd
    , view source, check robots.txt, try default creds
  6. Deep analysis — Apply category-specific techniques from skill files
  7. Write exploit — Create 
    solve.py
    with working solution
  8. Capture flag — Save to 
    flag.txt
    , print clearly

Category Skills

Read skill files for detailed techniques: 
.agents/skills/ctf-<category>/SKILL.md
CategorySkillWhen to Use
Web
ctf-web
XSS, SQLi, SSTI, SSRF, JWT, file uploads, auth bypass, prototype pollution
Reverse
ctf-reverse
Binary analysis, game clients, obfuscated code, VMs, anti-debug
Pwn
ctf-pwn
Buffer overflow, format string, heap, kernel, ROP, race conditions
Crypto
ctf-crypto
RSA, AES, ECC, ZKP, PRNG, classical ciphers, Z3 solving
Forensics
ctf-forensics
Disk images, memory dumps, PCAP, event logs, file carving
OSINT
ctf-osint
Social media, geolocation, DNS, username enumeration
Malware
ctf-malware
Obfuscated scripts, C2 traffic, PE/NET analysis, protocol reversing
Misc
ctf-misc
Encodings, jail escapes, SDR/RF, QR codes, esolangs, floating point
Stego
ctf-stego
Image/audio steganography, LSB, spectrograms, hidden data
Recon
ctf-recon
Port scanning, service enumeration, web directory fuzzing

Quick Reference

bash
# Connect and interact
nc host port
echo -e "answer1\nanswer2" | nc host port
curl -v http://target/
curl -s http://target/ | grep -i flag

# Find flags in files
strings * | grep -iE "(flag|ctf)\{"
grep -rn "flag{" . && grep -rn "CTF{" .
find . -name "flag*" 2>/dev/null

# File analysis
file *; binwalk *; exiftool *
xxd suspicious_file | head -20

When Stuck

  1. Re-read the challenge description — titles and flavor text are hints
  2. Try the challenge from a different category's perspective
  3. Check for known CVEs in the tech stack
  4. Search CTFtime writeups for similar challenges
  5. Look for off-by-one errors in your analysis
  6. Try all common encodings (base64, hex, rot13, URL)

Challenge

$ARGUMENTS