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ctf-reverse
76 / 100 · Review before installing
Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.
By ljagiello/ctf-skills (GitHub) · coding · 3,679 stars · scanned at commit e79be29
Provides reverse engineering techniques for CTF challenges. Use when the main job is to understand how a compiled, obfuscated, packed, or virtualized target works before exploiting or solving it, including binaries, APKs, WASM, firmware, custom VMs, bytecode, game clients, malware-like loaders, and anti-debug or anti-analysis logic. Do not use it when the vulnerability is already understood and the remaining task is exploitation; use pwn instead. Do not use it for pure web workflows, log or dis…
Works with any agent that supports SKILL.md skills.
What this skill can do
Downloads and installs other software
This is disclosed by the author in the skill's SKILL.md or README.
Found in 20 places.
Show 17 more
- ctf-reverse/SKILL.md, line 42
- pwndbg — Linux: [GitHub](https://github.com/pwndbg/pwndbg), macOS: `brew install pwndbg/tap/pwndbg-gdb` - ctf-reverse/languages-compiled.md, line 262
cargo install rustfilt - ctf-reverse/languages-compiled.md, line 327
cargo install cargo-bloat - ctf-reverse/languages-platforms.md, line 305
npm install -g @electron/asar - ctf-reverse/mba-simplification.md, line 17
uv pip install "msynth @ git+https://github.com/mrphrazer/msynth.git" z3-solver - ctf-reverse/mba-simplification.md, line 18
uv pip install "miasm @ git+https://github.com/cea-sec/miasm.git@1dc5fa9" - ctf-reverse/mba-simplification.md, line 21
> Note: msynth is not on PyPI (`uv pip install msynth` fails with "not found in the package registry") — install from the git URL. Pin miasm to commit `1dc5fa9` - ctf-reverse/platforms-hardware.md, line 113
apt install gcc-aarch64-linux-gnu gdb-multiarch qemu-user-static - ctf-reverse/platforms.md, line 273
apt install gcc-arm-linux-gnueabihf gdb-multiarch - ctf-reverse/tools-advanced-2.md, line 153
bash -c "$(curl -fsSL https://gef.blah.cat/sh)" - ctf-reverse/tools-advanced.md, line 375
pip install retdec-decompiler - ctf-reverse/tools-dynamic.md, line 47
pip install frida-tools frida - ctf-reverse/tools-dynamic.md, line 293
pip install angr - ctf-reverse/tools-emulation.md, line 29
pip install qiling - ctf-reverse/tools-mcp.md, line 79
pip install ida-pro-mcp - ctf-reverse/tools-mcp.md, line 481
uvx jadx-mcp-server # or follow the repo README for manual launch - ctf-reverse/unicorn-emulation.md, line 47
pip install unicorn==2.1.2 capstone keystone-engine
Runs commands on your computer
This is disclosed by the author in the skill's SKILL.md or README. Expected for a coding skill.
Found in 18 places.
Show 15 more
- ctf-reverse/SKILL.md, line 37
r2pm -ci r2ghidra # Native Ghidra decompiler for radare2 - ctf-reverse/SKILL.md, line 98
strings binary | grep -E "flag\{|CTF\{|pico" - ctf-reverse/SKILL.md, line 122
strings binary | grep -inE "flag|ctf\{|congrat|correct|wrong" # filter, don't truncate - ctf-reverse/SKILL.md, line 139
file binary # Type, architecture - ctf-reverse/SKILL.md, line 156
gdb ./binary - ctf-reverse/SKILL.md, line 178
r2 -d ./binary # Debug mode - ctf-reverse/anti-analysis.md, line 114
unshare -m bash -c 'mount --bind /dev/null /proc/self/status && ./binary' - ctf-reverse/languages-platforms.md, line 256
- Use `subprocess.run()` with `timeout=2` to handle binaries that hang on bad input - ctf-reverse/patterns-ctf-3.md, line 527
asm = subprocess.check_output(["objdump", "-M", "intel", "-d", binary]).decode() - ctf-reverse/patterns-ctf.md, line 207
result = subprocess.run( - ctf-reverse/patterns-ctf.md, line 564
bash -c "LD_PRELOAD=./hook.so ./ransomware; xxd /tmp/aes_key.bin" - ctf-reverse/radare2-r2pipe.md, line 265
out = subprocess.run( - ctf-reverse/tools-advanced-2.md, line 153
bash -c "$(curl -fsSL https://gef.blah.cat/sh)" - ctf-reverse/tools-emulation.md, line 179
proc = subprocess.Popen( - ctf-reverse/tools-emulation.md, line 181
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Sends data to these websites: www.python.org, gef.blah.cat, dogbolt.org
This is disclosed by the author in the skill's SKILL.md or README.
Found in 13 places.
Show 10 more
- ctf-reverse/tools-mcp.md, line 229
curl -s http://127.0.0.1:8089/check_connection # "Connection OK - GhidraMCP Headless Server ..." - ctf-reverse/tools-mcp.md, line 264
curl -s -X POST -H 'Content-Type: application/json' \ - ctf-reverse/tools-mcp.md, line 266
curl -s ":8089/get_metadata" # -> Program Name: hello (the original) - ctf-reverse/tools-mcp.md, line 267
curl -s ":8089/get_metadata?program=true" # -> Program Name: true (selected) - ctf-reverse/tools-mcp.md, line 295
curl -X POST -H 'Content-Type: application/json' -d '{"program":"chall"}' \ - ctf-reverse/tools-mcp.md, line 297
curl -X POST ":8089/run_analysis?program=chall" - ctf-reverse/tools-mcp.md, line 381
curl -s -X POST --data-urlencode "name=$a" --data-urlencode "enabled=true" \ - ctf-reverse/tools-mcp.md, line 384
curl -s -X POST http://127.0.0.1:8089/run_analysis - ctf-reverse/tools-mcp.md, line 499
until curl -s --max-time 2 http://127.0.0.1:8650 >/dev/null; do sleep 2; done - ctf-reverse/tools.md, line 518
curl -F "file=@binary" https://dogbolt.org/api/binaries/
Changes files outside its own folder
The author does not mention this.
Found in 4 places.
Show 1 more
Safer alternatives
Low-risk skills in the same category (coding) that look related. Check that one does what you need.
Install
Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.
if [ -e ~/.agents/skills/'ctf-reverse' ] || [ -L ~/.agents/skills/'ctf-reverse' ]; then echo 'A skill folder named ctf-reverse already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/ljagiello/ctf-skills' "$d" && git -C "$d" checkout --quiet 'e79be2925d1612e8a97070d6201e300286672370' -- 'ctf-reverse' && mkdir -p ~/.agents/skills && cp -R "$d"/'ctf-reverse' ~/.agents/skills/'ctf-reverse' && rm -rf "$d"; fi
Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'ctf-reverse' ~/.claude/skills/'ctf-reverse' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.
Badge for your README
The badge for ljagiello/ctf-skills shows the score of its lowest-scoring skill.
[](https://zalavijaysinh.github.io/skilltrust/repos/ljagiello/ctf-skills/)
Score history
| Date | Version | Score |
|---|
| 2026-11-11 | e79be29 | 76 |
| 2026-11-08 | 2ad85d3 | 76 |
| 2026-11-07 | 2ad85d3 | 56 |