Get ExternalC2 listener details
AI agents call get_listener_externalC2 to retrieve information from Cobalt Strike MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves listener configuration information without modifying, deleting, or executing operations. However, it receives 'high' severity rather than 'low' because it accesses sensitive red team infrastructure details (C2 listener configuration) that could be weaponized by an AI agent to understand attacker command-and-control setup, facilitate lateral movement, or compromise operational security of ongoing…
From the tool's definition Tool name 'get_listener_externalC2' and description 'Get ExternalC2 listener details' indicate data retrieval with no modification. The tool queries configuration details of a Cobalt Strike ExternalC2 listener, which is a read-only operation.
Attacks that exploit this kind of access
Get ExternalC2 listener details. It is categorised as a Read tool in the Cobalt Strike MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Cobalt Strike MCP Server MCP server in PolicyLayer and add a rule for get_listener_externalC2: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Cobalt Strike MCP Server. Nothing to install.
get_listener_externalC2 is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_listener_externalC2 rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_listener_externalC2. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_listener_externalC2 is provided by the Cobalt Strike MCP Server MCP server (mickeydb/cobalt-strike-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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