T09 · Insecure Skill Coding Practices
- Location
GitHubSkill.js:1- Finding
Deliberate Obfuscation and Anti-Analysis Logic Conceal Security-Critical Behavior
- Content
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Vulnerability Details
File Location:
GitHubSkill.js:1,index.js:1,api/GitHubClient.js:1,strategies/IssueStrategies.js:1,strategies/PRStrategies.js:1,strategies/ReleaseStrategies.js:1,strategies/index.js:1, andpackage.json:43-44
Vulnerability Type: Deliberate code obfuscation and anti-analysis controls
Risk Level: HighVulnerable Code
All executable JavaScript files are compressed onto a single line. Representative code from
GitHubSkill.js:1:javascript const a0_0x1abc6f=a0_0x5433;(function(_0x2811b6,_0x12811a){const _0x213b86=a0_0x5433,_0x56caea=_0x2811b6();while(!![]){try{const _0x45c0a0=-parseInt(_0x213b86(0x20f))/0x1*(parseInt(_0x213b86(0x183))/0x2)+-parseInt(_0x213b86(0x181))/0x3*(-parseInt(_0x213b86(0x187))/0x4)+-parseInt(_0x213b86(0x15e))/0x5+parseInt(_0x213b86(0x204))/0x6*(parseInt(_0x213b86(0x213))/0x7)+parseInt(_0x213b86(0x167))/0x8+parseInt(_0x213b86(0x15f))/0x9+parseInt(_0x213b86(0x206))/0xa*(-parseInt(_0x213b86(0x145))/0xb);if(_0x45c0a0===_0x12811a)break;else _0x56caea['push'](_0x56caea['shift']());}catch(_0x296b58){_0x56caea['push'](_0x56caea['shift']());}}}(a0_0x267b,0x781bd)); const a0_0x2d9fce=(function(){let _0x50114b=!![];return function(_0x5882e4,_0x30a11f){const _0x52ad5e=_0x50114b?function(){const _0xbaaa31=a0_0x5433;if(_0x30a11f){const _0x15c865=_0x30a11f[_0xbaaa31(0x17d)](_0x5882e4,arguments);return _0x30a11f=null,_0x15c865;}}:function(){};return _0x50114b=![],_0x52ad5e;};}()), a0_0x1e773f=a0_0x2d9fce(this,function(){const _0x1d2a59=a0_0x5433,_0x4b1b26={};_0x4b1b26[_0x1d2a59(0x23d)]=_0x1d2a59(0x164);const _0x251a61=_0x4b1b26;return a0_0x1e773f[_0x1d2a59(0x209)]()[_0x1d2a59(0x1ed)](_0x251a61[_0x1d2a59(0x23d)])[_0x1d2a59(0x209)]()[_0x1d2a59(0x1cd)](a0_0x1e773f)[_0x1d2a59(0x1ed)](_0x251a61[_0x1d2a59(0x23d)]);}); a0_0x1e773f();Representative self-defending expression found in the obfuscated string tables:
javascript '(((.+)+)+)+$'The package metada ...[truncated 2293 chars]
- Remediation
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Remediation Suggestions
- Publish readable, non-obfuscated source for every executable module.
- Remove self-defending regular expressions, opaque control flow, rotating string tables, and anti-analysis bootstrap code.
- Include source maps that correspond exactly to the distributed JavaScript.
- Use reproducible builds and publish build instructions so consumers can verify that packaged artifacts were produced from reviewed source.
- Sign release artifacts and publish cryptographic checksums or provenance attestations.
- Add automated review gates that compare the published npm package against the source repository.
- Keep security-critical token handling and GitHub API calls straightforward and independently testable.
