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c2-alternative-channels

Non-traditional C2 channels — Discord/Telegram bots, DNS-over-HTTPS, blockchain-based C2, email-based C2, and cloud function dead drops for covert command and control.

62

Quality

73%

Does it follow best practices?

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SecuritybySnyk

Critical

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Fix and improve this skill with Tessl

tessl review fix ./packages/decepticon/decepticon/skills/standard/post-exploit/c2-alternative-channels/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

65%

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

The body is highly actionable — full executable implants and commands for six C2 channels — but trades conciseness and progressive disclosure for a monolithic reference. Concept intros and deployment steps could be tightened, and per-channel content could be split into reference files.

Suggestions

Trim the per-section concept explanations (what DoH/Discord webhooks are) to one line or remove them; assume Claude knows the underlying services and keep only the OPSEC-relevant framing.

Add explicit validation checkpoints to each channel's deployment flow (e.g. confirm a successful checkin/exfil round-trip before declaring the channel operational).

Move the per-channel implant details, Detection Signatures, and Error Handling tables into one-level-deep reference files (e.g. references/channels/*.md) and keep SKILL.md as an overview with the Decision Gate and pointers.

DimensionReasoningScore

Conciseness

Mostly efficient with full executable code, but each section opens by explaining concepts Claude already knows (e.g. 'DNS-over-HTTPS encapsulates DNS queries inside HTTPS... Since DoH bypasses traditional DNS monitoring'), and the ~488-line body could be tightened; not 3 because not every token earns its place, not 1 because it is not padded with basic library/format tutorials.

2 / 3

Actionability

Provides fully executable, copy-paste-ready code across languages (Python implants, Bash beacons, a Solidity contract) plus concrete curl commands and setup steps, matching the 'fully executable code; copy-paste ready' anchor.

3 / 3

Workflow Clarity

The Decision Gate sequences channel selection clearly and the Error Handling table gives recovery guidance, but per-channel deployment steps lack explicit validation checkpoints (e.g. verify check-in/connectivity before relying on the channel); not 1 because a real sequenced decision process exists, not 3 because validation checkpoints are missing or implicit.

2 / 3

Progressive Disclosure

Well-organized into clear sections, but everything is inline in one ~488-line file with no external references and no bundle files — content that could be split (per-channel detail, detection/error tables) lives in SKILL.md; not 1 because organization is good, not 3 because nothing is split out or referenced one level deep.

2 / 3

Total

9

/

12

Passed

Description

82%

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

The description is specific and trigger-rich, naming five concrete alternative C2 channels with natural keywords. Its only real gap is the absence of an explicit 'Use when...' clause, which caps completeness at 2.

Suggestions

Append an explicit trigger clause, e.g. 'Use when the user needs alternative or covert C2 channels, or mentions Discord/Telegram/DoH/blockchain/email/cloud-based C2 or dead drops.'

DimensionReasoningScore

Specificity

Lists multiple specific concrete channels — 'Discord/Telegram bots, DNS-over-HTTPS, blockchain-based C2, email-based C2, and cloud function dead drops' — rather than vague language, matching the 'lists multiple specific concrete actions' anchor.

3 / 3

Completeness

Clearly states what the skill does, but the description lacks an explicit 'Use when...' trigger clause; per the judging guidelines a missing when-clause caps completeness at 2 rather than 3.

2 / 3

Trigger Term Quality

Includes natural terms a red-teamer would say ('Discord/Telegram bots', 'DNS-over-HTTPS', 'blockchain-based C2', 'email-based C2', 'cloud function dead drops') with good coverage of common variations; not the level below because it spans several distinct service terms rather than a single keyword.

3 / 3

Distinctiveness Conflict Risk

Clear niche — non-traditional/alternative C2 channels — with distinct per-service triggers unlikely to fire for the wrong skill; not 2 because the channel list is specific enough to avoid overlap with a generic C2 skill.

3 / 3

Total

11

/

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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