c2-cobalt-strike
Cobalt Strike operations — Beacon deployment, Malleable C2 profile creation, listener setup, OPSEC-safe beacon configuration, process injection, and Arsenal kit usage.
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Critical
Do not install without reviewing
Security
4 findings: 2 critical severity, 1 high severity, 1 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions.
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
Three of the listed URLs are community GitHub repositories providing Cobalt Strike Malleable C2 profiles and BOF payloads (tools that directly enable evasion, post‑exploitation and payload execution), which are high‑risk sources for distributing malware; the official vendor link is benign but dual‑use.
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 operational playbook for deploying Cobalt Strike beacons and Malleable C2 profiles — it contains step-by-step instructions to establish covert command-and-control, persistent backdoors, remote code execution (injection/hollowing), lateral movement, evasion/obfuscation, and data exfiltration — i.e., high-risk malicious functionality.
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 skill instructs running the teamserver by passing a password argument on the command line (e.g., ./teamserver <TEAMSERVER_IP> <PASSWORD> ...), which requires the LLM to handle and potentially emit secret values verbatim.
W013: Attempt to modify system services in skill instructions.
What this means
The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.
Why it was flagged
The skill explicitly instructs modifying system state (e.g., registering a Windows service via "sc create", starting a teamserver from /opt and binding to privileged ports like 443/53, and building artifacts under /opt), actions that require elevated privileges and can persist or alter the host.
- Repository
- PurpleAILAB/Decepticon
- Commit
e34afba
- Audited
- Security analysis
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