spawn_dcsync · Cobalt Strike MCP Server MCP: Risk & Policy

WHAT IT DOES

What spawn_dcsync does on Cobalt Strike MCP Server

AI agents invoke spawn_dcsync 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_dcsync needs a policy

DCSync is a highly destructive offensive technique that extracts credential hashes (including krbtgt and all user accounts) from Active Directory by simulating domain controller replication. While it reads data, its primary purpose is an attack that enables full domain compromise.

From the tool's definition 'Perform DCSync attack (spawn mode)' — DCSync is an Active Directory credential extraction attack that impersonates a domain controller to replicate and steal password hashes for all domain accounts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spawn_dcsync Rate-limited

spawn_dcsync 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_dcsync": {
      "limits": [
        {
          "counter": "spawn_dcsync_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_dcsync

What does the spawn_dcsync tool do? +

Perform DCSync attack (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_dcsync? +

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

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

Can I rate-limit spawn_dcsync? +

Yes. Add a rate_limit block to the spawn_dcsync 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_dcsync completely? +

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

spawn_dcsync 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.