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sidewinder-rattlesnake

Adversary-emulation profile for SideWinder (G0121 / Rattlesnake / T-APT-04 / Razor Tiger), India's suspected state-sponsored cyber-espionage actor.

54

Quality

61%

Does it follow best practices?

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SecuritybySnyk

Critical

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tessl review fix ./packages/decepticon/decepticon/skills/shared/adversary-emulation/sidewinder/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

50%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A thorough, well-organized adversary-emulation profile with concrete TTP mappings and useful detection guidance, but it is verbose, delegates execution to other skills without executable commands, lacks validation checkpoints in the emulation workflow, and is monolithic with no progressive disclosure.

Suggestions

Trim the attribution/campaign narrative to the minimum needed for emulation and move detailed historical campaigns to a references/ file, keeping SKILL.md as a lean overview.

Add explicit validation/checkpoint steps to the emulation workflow (e.g., verify lure renders, confirm side-load DLL resolves, validate C2 callback before proceeding) to satisfy the feedback-loop requirement for offensive operations.

Provide at least minimal executable snippets or exact command skeletons for the key chain stages rather than only referencing external skills, so the guidance is copy-paste actionable.

DimensionReasoningScore

Conciseness

The body is substantive and domain-specific (not generic filler), but the extensive attribution, decade-long campaign narrative, and targeting background exceed what is needed to drive emulation and could be tightened.

2 / 3

Actionability

Guidance is concrete in places — named binaries (rekeywiz.exe), CVEs (CVE-2017-11882), pipe names, ATT&CK mappings — but it delegates execution to other skills ('Use the phishing skill', 'payload-builder skill') and provides no copy-paste executable commands, leaving key implementation details implicit.

2 / 3

Workflow Clarity

The signature chain (LNK → HTA → JavaScript → .NET) is sequenced and organized by tactic, but there are no explicit validation checkpoints or error-recovery loops; for offensive/destructive operations the rubric caps workflow clarity at 2 when validation is missing.

2 / 3

Progressive Disclosure

The body is well-sectioned with clear headings, but it is a single monolithic file with no bundle references; the ~145-line TTP catalog and campaign history are inline content that could be split into reference files, and the under-50-line simple-skill exception does not apply.

2 / 3

Total

8

/

12

Passed

Description

72%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A specific, distinctive description anchored to a named threat actor with strong trigger-term coverage, but it lacks an explicit 'Use when...' trigger and does not enumerate concrete actions, leaving both the 'when' and the capability list implicit.

Suggestions

Add an explicit trigger clause, e.g. 'Use when emulating SideWinder/Rattlesnake TTPs, building India-nexus APT espionage scenarios, or mapping G0121 campaigns to ATT&CK.'

List a few concrete actions (e.g., 'craft themed spearphishing lures, build LNK→HTA→JS→.NET chains, emulate DLL side-loading and StealerBot modules') to lift specificity.

DimensionReasoningScore

Specificity

The description names the domain ('Adversary-emulation profile') and the specific actor ('SideWinder (G0121 / Rattlesnake / T-APT-04 / Razor Tiger)') but lists no concrete actions (e.g., craft lures, build payloads, emulate TTPs), so it stops at naming the domain rather than enumerating capabilities.

2 / 3

Completeness

It clearly states what the skill is (an adversary-emulation profile) but has no explicit 'Use when...' trigger clause, so the 'when' is only implied; per the rubric guideline a missing explicit trigger caps completeness at 2.

2 / 3

Trigger Term Quality

It covers the natural terms a threat-intel user would actually say — 'SideWinder', 'Rattlesnake', 'T-APT-04', 'Razor Tiger', 'G0121', 'state-sponsored cyber-espionage' — giving good coverage of common aliases.

3 / 3

Distinctiveness Conflict Risk

It targets a single named APT actor with distinct aliases, creating a clear niche unlikely to trigger for unrelated skills.

3 / 3

Total

10

/

12

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
PurpleAILAB/Decepticon
Reviewed

Table of Contents

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