evilginx2-proxy
Author and deploy an evilginx2 phishlet to reverse-proxy a real login and capture the post-authentication session cookie, defeating MFA via session-token theft.
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Critical
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tessl review fix ./packages/decepticon/decepticon/skills/standard/phisher/evilginx2-proxy/SKILL.mdSecurity
3 findings: 1 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.
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 explicitly instructs how to deploy and use evilginx2 for adversary-in-the-middle phishing to capture session cookies, credentials, and replay authenticated sessions to bypass MFA, indicating clear malicious intent for credential theft and session hijacking.
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 capturing, displaying, exporting, and reusing session cookies, usernames, and passwords (cookie JSON and Cookie headers), which requires the LLM/agent to handle and output secret values verbatim, creating a direct exfiltration risk.
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 instructs deploying a network service that requires writing under /opt and binding privileged ports (443/53), and it guides capturing and replaying session tokens (credential theft), which effectively pushes the agent to perform privileged system/network modifications and persist malicious state on the host.
- Repository
- PurpleAILAB/Decepticon
- Commit
31e1c8e
- Audited
- Security analysis
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