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analyzing-packed-malware-with-upx-unpacker

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By mukul975/Anthropic-Cybersecurity-Skills (GitHub) · security · 35,906 stars · scanned at commit 54a7988

'Identifies and unpacks UPX-packed malware samples, including binaries with modified UPX magic bytes or headers that block automated decompression, to recover the original executable for static analysis. Use when a sample shows high entropy, minimal imports, or only LoadLibrary/GetProcAddress in its import table, or when preparing a packed binary for disassembly in Ghidra or IDA.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'analyzing-packed-malware-with-upx-unpacker' ] || [ -L ~/.agents/skills/'analyzing-packed-malware-with-upx-unpacker' ]; then echo 'A skill folder named analyzing-packed-malware-with-upx-unpacker already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/mukul975/Anthropic-Cybersecurity-Skills' "$d" && git -C "$d" checkout --quiet '54a798831d2266a3ca61ce68a7acb80b81160d57' -- 'skills/analyzing-packed-malware-with-upx-unpacker' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/analyzing-packed-malware-with-upx-unpacker' ~/.agents/skills/'analyzing-packed-malware-with-upx-unpacker' && 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/'analyzing-packed-malware-with-upx-unpacker' ~/.claude/skills/'analyzing-packed-malware-with-upx-unpacker' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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