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TLCTC (Top Level Cyber Threat Clusters) — a cause-oriented, axiomatic cyber threat taxonomy framework. See https://www.tlctc.net
Claude Skills are markdown + scripts loaded into Claude Code; scanned with the same pipeline.
We found this by crawling public sources and nobody has attested to it. That is how most of the registry gets here, and it is not a mark against the artifact — it only means no authenticated act of publication is on record. An artifact can be the vendor's own and still appear here.
18 critical findings reported by cisco-skill-scanner, agent-audit-kit, 11 of them in the installed artifact. The composite score alone does not reflect this — read the per-scanner reports below.
This artifact ships from 2 sources and their verdicts differ. The worst is github (Flagged). Installing from a cleaner source does not mean the others are safe — check the source you actually install from.
github: https://github.com/barnes70/tlctc, 445 findings
Claude Skills install to a single target, no runtime picker.
nerlo install -- tlctc
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- tlctc ~/.claude/skills/
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
6 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v1.4.0
0 findings · 0.5s
v2.0.11
364 findings · 107.5s
v0.3.74
16 findings · 17.9s
v0.1.0
0 findings · 6.6s
v0.1.0
11 findings · 6.6s
v0.1.0
0 findings · 9.8s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.1s
No report in this scan: govulncheck, osv-scanner, trivy, trivy_image.
1 scan on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Aug 22, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-multi-source: complete | rejected |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 391 findings across every scanner that examined this package. 7 of 18 findings rated critical by their scanner were among the dismissals.
Not reviewed is not the same as clean. Those 1 finding stand exactly as their scanners reported them, at full severity, as they would have without this review.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
54 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: YARA_script_injection_generic, DATA_EXFIL_JS_FS_ACCESS, AAK-IPI-WILD-CORPUS-001 and 8 more · Files: /repo/documentation/html-build.js, /repo/tools/stix-exporter/export-stix.test.js, documentation/tlctc-v2.0-whitepaper.md and 18 more · reported by cisco-skill-scanner, agent-audit-kit
1 Test or fixture file — The match is in a test or fixture. Our own check confirmed the file is not part of what gets installed.
Rules: AAK-INDIA-PII-001 · Files: mappings/sigma/tests/fixtures/rules/untagged.yml · reported by agent-audit-kit
These findings are in files this artifact installs and are not placeholder values. No false-positive basis can be corroborated for such a finding, so this review never dismisses one; they were not sent to the model and stand at their scanner's severity.
177 FILE_MAGIC_MISMATCH
Files: /repo/okf/rules/r-supply.md, /repo/okf/rules/r-transit-3.md, /repo/okf/glossary/control.md and 56 more · reported by cisco-skill-scanner
36 MANIFEST_MISSING_LICENSE
Files: /repo/SKILL.md, /repo/tools/SKILL.md, /repo/okf/SKILL.md and 33 more · reported by cisco-skill-scanner
24 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/tools/SKILL.md, /repo/okf/SKILL.md and 21 more · reported by cisco-skill-scanner
16 DATA_EXFIL_JS_FS_ACCESS
Files: /repo/scripts/build-okf.js, /repo/scripts/build-pdf.js, /repo/scripts/validate-framework.js and 2 more · reported by cisco-skill-scanner
14 YARA_capability_inflation_generic
Files: /repo/attack-paths/darkhotel-wifi-2014.json, /repo/mappings/mitre-attack-enterprise/tlctc-enterprise-attack.json, /repo/okf/attack-paths/darkhotel-wifi-2014.md and 2 more · reported by cisco-skill-scanner
1 The model did not answer for these findings.
Rules: UNANALYZABLE_BINARY · Files: /repo/documentation/tlctc-v2.5-application.pdf · reported by cisco-skill-scanner
Critical findings indicate credential harvesting and system manipulation.
The artifact contains critical findings related to credential harvesting in multiple documentation and configuration files. High severity findings also indicate potential for system manipulation and data exfiltration via file system access. Additionally, the artifact exhibits characteristics of prompt injection and contains secrets within its installed code.
Concern level assessed by the review: Critical. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.
12 DATA_EXFIL_NETWORK_REQUESTS
Files: /repo/integrations/sonarqube/cli/sonar_client.py · reported by cisco-skill-scanner
11 YARA_credential_harvesting_generic
Files: /repo/attack-paths/colonial-pipeline-2021.json, /repo/okf/attack-paths/colonial-pipeline-2021.md, /repo/mappings/mitre-attack-enterprise/decision-tree.md and 2 more · reported by cisco-skill-scanner
10 opt.nerlo-rules.nerlo-install-run-bundled-artifact
Files: /repo/okf/mappings/attack/cluster-1.md, /repo/okf/mappings/sigma/cluster-1.md · reported by nerlo-install-instruction
8 YARA_system_manipulation_generic
Files: /repo/okf/mappings/sigma/cluster-1.md · reported by cisco-skill-scanner
5 YARA_tool_chaining_abuse_generic
Files: /repo/attack-paths/blockade-spider-embargo-2025.json, /repo/okf/attack-paths/blockade-spider-embargo-2025.md · reported by cisco-skill-scanner
4 EXCESSIVE_FILE_COUNT
Files: /repo/., /repo/integrations/., /repo/okf/glossary/. and 1 more · reported by cisco-skill-scanner
4 TOOL_ABUSE_UNDECLARED_NETWORK
Files: /repo/repo/README.md, /repo/integrations/repo/integrations/README.md, /repo/mappings/cisa-kev/repo/mappings/cisa-kev/README.md and 1 more · reported by cisco-skill-scanner
3 AAK-IPI-WILD-CORPUS-001
Files: mappings/mitre-attack-enterprise/tlctc-enterprise-attack.json, mappings/cisa-kev/tlctc-kev.json, mappings/cisa-kev/input/known_exploited_vulnerabilities.v2026.04.14.json · reported by agent-audit-kit
3 MANIFEST_INVALID_NAME
Files: /repo/integrations/cortex-xsoar-8/ReleaseNotes/SKILL.md, /repo/integrations/sarif/ReleaseNotes/SKILL.md, /repo/integrations/sonarqube/ReleaseNotes/SKILL.md · reported by cisco-skill-scanner
2 AAK-SECRET-004
Files: mappings/npm-supply-chain/tlctc-npm-patterns.json, integrations/sarif/cli/sarif_loader.py · reported by agent-audit-kit
1 AAK-HEALTHCARE-AI-004
Files: plugins/tlctc/skills/tlctc-classify/SKILL.md · reported by agent-audit-kit
1 AAK-MARKETPLACE-001
Files: .claude-plugin/marketplace.json · reported by agent-audit-kit
1 AAK-SUPPLY-004
Files: package.json · reported by agent-audit-kit
1 LOW_ANALYZABILITY
Files: /repo/tools/stix-exporter · reported by cisco-skill-scanner
1 opt.nerlo-rules.nerlo-install-shell-inline-command
Files: /repo/okf/mappings/attack/cluster-1.md · reported by nerlo-install-instruction
1 PROMPT_INJECTION_UNRESTRICTED_MODE
Files: /repo/okf/mappings/attack/SKILL.md · reported by cisco-skill-scanner
Showing 25 of 43; the rest are in the per-scanner reports above.