beacon_copy_file · Cobalt Strike MCP Server MCP

WHAT IT DOES

What beacon_copy_file does on Cobalt Strike MCP Server

AI agents invoke beacon_copy_file 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 IT NEEDS A POLICY

Why beacon_copy_file needs a policy

This tool executes a file copy operation on a remote beacon (a compromised system in a red team/adversary simulation context). While copying a file is not inherently destructive, executing commands on a remote beacon has significant blast radius: it can be used to stage payloads, duplicate sensitive files for exfiltration, or overwrite existing files.

From the tool's definition 'Copy a file on a beacon' — executes a file copy operation on a remote Cobalt Strike beacon (compromised host)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

beacon_copy_file Rate-limited

beacon_copy_file 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "beacon_copy_file": {
      "limits": [
        {
          "counter": "beacon_copy_file_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Cobalt Strike MCP Server, so you can run agents against it safely.

FAQ

Questions about beacon_copy_file

What does the beacon_copy_file tool do? +

Copy a file on a beacon. 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.

How do I enforce a policy on beacon_copy_file? +

Register the Cobalt Strike MCP Server MCP server in PolicyLayer and add a rule for beacon_copy_file: 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.

What risk level is beacon_copy_file? +

beacon_copy_file is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit beacon_copy_file? +

Yes. Add a rate_limit block to the beacon_copy_file 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.

How do I block beacon_copy_file completely? +

Set action: deny in the PolicyLayer policy for beacon_copy_file. 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.

What MCP server provides beacon_copy_file? +

beacon_copy_file 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.