runBeaconInterpreterC
Execute Beacon Interpreter C source using /execute/interpreter/pack.
This record as markdown: /tools/cobalt-strike-cobaltstrike-mcp-server/runbeaconinterpreterc.md
What runBeaconInterpreterC does on Cobalt Strike MCP Server
AI agents invoke runBeaconInterpreterC to trigger actions in Cobalt Strike MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why runBeaconInterpreterC is rated High
This tool executes arbitrary C code through Cobalt Strike's Beacon interpreter on remote systems. This is a classic Execute category tool with critical severity due to its capability to run unrestricted code on compromised endpoints, potentially allowing lateral movement, privilege escalation, data exfiltration, or system compromise.
From the tool's definition Tool name contains 'Execute' and description states 'Execute Beacon Interpreter C source'. Beacon Interpreter is a Cobalt Strike C2 feature for running arbitrary code on compromised hosts.
Attacks that exploit this kind of access
The rule that runs runBeaconInterpreterC safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Cobalt Strike MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For runBeaconInterpreterC, this is the rule to start with:
runBeaconInterpreterC stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Cobalt Strike MCP Server, apply this rule, and every runBeaconInterpreterC call is checked against it from then on.
Questions about runBeaconInterpreterC
Execute Beacon Interpreter C source using /execute/interpreter/pack. It is categorised as a Execute tool in the Cobalt Strike MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Cobalt Strike MCP Server MCP server in PolicyLayer and add a rule for runBeaconInterpreterC: 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.
runBeaconInterpreterC is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the runBeaconInterpreterC 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 runBeaconInterpreterC. 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.
runBeaconInterpreterC is provided by the Cobalt Strike MCP Server MCP server (cobalt-strike/cobaltstrike-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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