opcua
OPC-UA (TCP 4840) attack playbook — endpoint enumeration, SecurityPolicy mapping, anonymous/weak-auth abuse, address-space browsing and tag read, HistoryRead exfiltration, Method call for control actions, session-exhaustion DoS. Modern IT/OT DMZ convergence protocol replacing legacy fieldbus.
57
66%
Does it follow best practices?
Run evals on this skill
Adds up to 20 points to the overall score
View guide
Critical
Do not install without reviewing
Fix and improve this skill with Tessl
tessl review fix ./packages/decepticon/decepticon/skills/standard/exploit/ics-ot/opcua/SKILL.mdSecurity
2 findings: 1 critical severity, 1 high severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
This document is an explicit OPC‑UA attack playbook instructing scanning, credential brute‑forcing, historian data exfiltration, remote method invocation (actuation), and session‑exhaustion DoS — clearly enabling malicious abuse rather than benign guidance.
W007: Insecure credential handling detected in skill instructions.
What this means
The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.
Why it was flagged
The playbook's code brute-forces, prints, and persists discovered usernames/passwords (e.g., logging "[+] VALID: user:pwd" and calling kg_add_node with "username" and "password"), which requires the agent to handle and output secret values verbatim.
- Repository
- PurpleAILAB/Decepticon
- Commit
e34afba
- Audited
- Security analysis
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.