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ti-yara-hunting

YARA rule writing from behavioral observations and TI report analysis — sample-to-rule conversion, condition optimization, performance tuning, and retrohunting on VirusTotal and ANY.RUN. Covers YARA/YARA-X syntax, yarGen automated generation, and production rule deployment.

61

Quality

72%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

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tessl review fix ./packages/decepticon/decepticon/skills/standard/analyst/ti-yara-hunting/SKILL.md
SKILL.md
Quality
Evals
Security

Low

Low-risk findings.

2 low severity findings. Worth noting, but not necessarily harmful.

Low

W011: Third-party content exposure detected (indirect prompt injection risk).

What this means

The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.

Why it was flagged

The required workflow includes “AI-assisted mode” (`python3 /opt/yarGen/yarGen.py --ai`) which (by the text description) generates an expanded string set using an AI prompt, and yarGen is fed extracted content from a malware sample directory (`/workspace/samples/<SAMPLE>`), which is outsider-originated free text/strings at runtime.

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Low

W012: Unverifiable external dependency detected (runtime URL that controls agent).

What this means

The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.

Why it was flagged

The skill performs a runtime git clone of remote code and then runs it (git clone https://github.com/Neo23x0/yarGen.git followed by running /opt/yarGen/yarGen.py and --update), so external content from that URL is fetched and executed and is a required dependency.

Repository
PurpleAILAB/Decepticon
Audited
Security analysis
Snyk

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