CtrlK
BlogDocsLog inGet started
Tessl Logo

turla-venomous-bear

Adversary-emulation profile for Turla (G0010 / Venomous Bear / Secret Blizzard / Waterbug / KRYPTON / Snake), Russia's FSB Center 16 cyber-espionage actor.

59

Quality

68%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Critical

Do not install without reviewing

Fix and improve this skill with Tessl

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

Quality

Content

65%Weight 40%Scale 1-3

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

A rich, well-organized adversary-emulation reference with concrete, tool-mapped emulation guidance and detection coverage, but it is a verbose monolithic document with no progressive disclosure and no explicit validation feedback loops for its destructive/risky operations.

Suggestions

Split the long TTP-by-tactic catalog, tooling table, campaign history, and detection sections into separate reference files (e.g., ttps.md, tooling.md, detection.md) referenced one level deep from SKILL.md, keeping the overview and emulation guidance inline.

Add an explicit validate→fix→retry checkpoint loop to the emulation guidance for destructive/risky operations (e.g., verify rootkit deployment in the isolated lab before chaining C2, and re-validate after each phase).

Tighten the campaign narratives and attribution/motivation prose to bare intelligence facts to reduce token weight without losing the actionable signal.

DimensionReasoningScore

Conciseness

The body avoids explaining concepts Claude already knows and the structured intelligence is the genuine content value, but the campaign narratives and attribution/motivation prose are discursive and could be tightened; at ~275 lines it is accurate yet padded relative to a lean reference.

2 / 3

Actionability

The 'Emulation guidance' section maps each signature play to specific ATT&CK IDs, named malware patterns, and concrete tools (Sliver, the c2/phishing/payload-builder skills) with precise artifacts like '.jpg.bfe' double extensions, 'w32time.dll', and BPF magic-packet activation — concrete, specific, actionable guidance rather than vague direction.

3 / 3

Workflow Clarity

Emulation steps are sequenced by kill-chain phase, but the operations are destructive/high-risk (kernel rootkits, domain takeover) and the body provides no explicit validate→fix→retry checkpoint loop, so workflow clarity is capped at 2 per the rubric's destructive-operations guideline.

2 / 3

Progressive Disclosure

Content is well-sectioned with clear headers, but it is a single monolithic ~275-line SKILL.md with no bundle files and no one-level-deep references; the campaigns, TTP catalog, tooling table, emulation guidance, and detection sections are all inline and could be split into separate reference files.

2 / 3

Total

9

/

12

Passed

Description

72%Weight 40%Scale 1-3

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 tightly scoped, highly distinctive description with excellent natural trigger terms, but it omits an explicit 'Use when...' clause (relegating triggers to metadata) and does not enumerate concrete skill actions, which caps both completeness and specificity.

Suggestions

Add an explicit 'Use when...' clause to the description (e.g., 'Use when emulating Turla/Secret Blizzard espionage operations or when the user mentions G0010, Snake, ComRAT, or FSB Center 86 intrusions') rather than relying solely on metadata.when_to_use.

Name one or two concrete actions the skill performs (e.g., 'maps Turla TTPs to emulation tooling and detection guidance') to lift specificity from domain-naming to action-enumeration.

DimensionReasoningScore

Specificity

The description names the domain ('Adversary-emulation profile') and the actor identity ('Russia's FSB Center 16 cyber-espionage actor') plus multiple aliases, but does not enumerate the concrete actions/capabilities the skill performs — it characterizes the profile's subject rather than listing specific actions.

2 / 3

Completeness

It answers 'what' (an adversary-emulation profile for Turla) but lacks an explicit 'Use when...' trigger clause in the description itself; the when-guidance lives only in the separate metadata.when_to_use field, capping completeness at 2 per the rubric guideline.

2 / 3

Trigger Term Quality

It packs natural terms a user would actually say — 'Turla', 'Venomous Bear', 'Secret Blizzard', 'Waterbug', 'KRYPTON', 'Snake', 'FSB Center 16', 'G0010' — giving strong coverage of the aliases a requester would mention.

3 / 3

Distinctiveness Conflict Risk

Naming a specific tracked actor (Turla / G0010) with several aliases carves out a clear niche with distinct triggers, making it very unlikely to fire for the wrong skill.

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

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.