Malicious MCP Research Kit
A local-first MCP attack kit for authorized security research and red teaming, demonstrating exfiltration, agent manipulation, and other abuse patterns via pluggable cases.
README
MCP Security Research Kit
Authorized, local-first MCP research kit for red-team / security assessments.
What it does
A FastMCP server registers realistic-looking integration tools in an MCP client's
tool store, typically alongside legitimate connectors (GitHub, Jira, etc.).
Each demonstration is a pluggable case under cases/. Enable only what you
need for a given engagement.
Also included:
listener.py— HTTP callback receiver for case proof- Engagement markers (
OPS_CANARY,OPS_CONNECTOR_CANARY) for unambiguous proof
Case coverage (9)
| # | Case | Demonstrates |
|---|---|---|
| 1 | URL callback | Sensitive data in markdown/image URLs |
| 2 | DNS | Secrets in DNS subdomain labels |
| 3 | Toxic agent flow | Hidden instructions in tool output |
| 4 | Rogue secret pull | Descriptions that harvest peer MCP material |
| 5 | Tool shadowing | Squatting familiar tool names |
| 6 | Token forwarding | Utility tools that solicit connector tokens |
| 7 | NetNTLM via UNC | UNC paths → SMB auth (scope-gated) |
| 8 | Browser access | Local browser profiles/cookies (scope-gated) |
| 9 | File callback | File-share tools that read paths and beacon |
Who it is for
Security researchers and penetration testers assessing MCP-enabled clients under explicit written authorization.
Authorized use only. Do not deploy against systems you do not own or lack permission to test.
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