Individual skill
deobfuscating-javascript-malware
Deobfuscates malicious JavaScript found in phishing pages, web skimmers, and dropper scripts by reversing encoding layers, eval chains, string manipulation, and control-flow obfuscation to reveal the original malicious logic. Use when investigating a phishing page's obfuscated JavaScript, analyzing a Magecart-style web skimmer, or deobfuscating a JavaScript dropper that fetches second-stage malware.
skills/deobfuscating-javascript-malware/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 35,816
- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- malware Declared skill tag
- javascript Declared skill tag
- deobfuscation Declared skill tag
- web-malware Declared skill tag
- script-analysis Declared skill tag
- engineering Derived category
Files and excerpt
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Browse files
LICENSEasset · 11,255 bytesSKILL.mdcore · 13,114 bytesSKILL.mdcore · 13,114 bytesSKILL.mdcore · 13,114 bytesreferences/api-reference.mddoc · 2,029 bytesscripts/agent.pyruns · 7,239 bytes
Read excerpt
# Deobfuscating JavaScript Malware
## When to Use
- Investigating a phishing page with obfuscated JavaScript that performs credential harvesting or redirect
- Analyzing a web skimmer (Magecart-style) injected into an e-commerce site
- Deobfuscating a JavaScript dropper that downloads and executes second-stage malware
- Examining malicious email attachments containing HTML files with embedded obfuscated scripts
- Analyzing browser exploit kits that use heavy JavaScript obfuscation to hide exploit delivery
**Do not use** for obfuscated JavaScript that is merely minified production code; use a standard beautifier instead.
## Prerequisites
