spawn_dotnetAssembly · Cobalt Strike MCP Server MCP

WHAT IT DOES

What spawn_dotnetAssembly does on Cobalt Strike MCP Server

AI agents invoke spawn_dotnetAssembly 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_dotnetAssembly needs a policy

This tool executes code (.NET assemblies) on remote systems without inherent restrictions on what the assembly does. The blast radius is critical: an AI agent given this tool could execute malware, exfiltrate data, modify system state, or pivot through a network. While destructive or financial harms are possible depending on assembly payload, the primary function is code execution (Execute category).

From the tool's definition Tool name 'spawn_dotnetAssembly' and description 'Execute .NET assembly' explicitly indicate execution of arbitrary code.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spawn_dotnetAssembly Rate-limited

spawn_dotnetAssembly 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_dotnetAssembly": {
      "limits": [
        {
          "counter": "spawn_dotnetassembly_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_dotnetAssembly

What does the spawn_dotnetAssembly tool do? +

Execute .NET assembly. 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_dotnetAssembly? +

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

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

Can I rate-limit spawn_dotnetAssembly? +

Yes. Add a rate_limit block to the spawn_dotnetAssembly 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_dotnetAssembly completely? +

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

spawn_dotnetAssembly 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.