spawn_postExDll · Cobalt Strike MCP Server MCP

WHAT IT DOES

What spawn_postExDll does on Cobalt Strike MCP Server

AI agents invoke spawn_postExDll 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 spawn_postExDll needs a policy

This tool spawns a process and loads a post-exploitation DLL into it, which executes arbitrary code in the context of a Cobalt Strike beacon. This is a core offensive capability enabling code execution, privilege escalation, lateral movement, and other attack techniques.

From the tool's definition Load post-exploitation DLL (spawn mode)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spawn_postExDll Rate-limited

spawn_postExDll 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": {
    "spawn_postExDll": {
      "limits": [
        {
          "counter": "spawn_postexdll_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 spawn_postExDll

What does the spawn_postExDll tool do? +

Load post-exploitation DLL (spawn mode). 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 spawn_postExDll? +

Register the Cobalt Strike MCP Server MCP server in PolicyLayer and add a rule for spawn_postExDll: 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 spawn_postExDll? +

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

Can I rate-limit spawn_postExDll? +

Yes. Add a rate_limit block to the spawn_postExDll 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 spawn_postExDll completely? +

Set action: deny in the PolicyLayer policy for spawn_postExDll. 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 spawn_postExDll? +

spawn_postExDll 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.