List all active listeners in the Cobalt Strike teamserver
AI agents call list_listeners 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 queries the state of Cobalt Strike infrastructure to enumerate active listeners. While it is read-only and has no direct side effects, the severity is high because the information retrieved (active listeners, their configurations, and network exposure) is operationally sensitive in a red team context and could inform adversarial targeting or operational security decisions.
From the tool's definition Tool description states 'List all active listeners' which retrieves and queries information about Cobalt Strike listeners without modifying or executing operations. The verb 'list' is a read-only operation.
Attacks that exploit this kind of access
List all active listeners in the Cobalt Strike teamserver. 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 list_listeners: 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.
list_listeners 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 list_listeners 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 list_listeners. 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.
list_listeners 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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