spawn_net_share · Cobalt Strike MCP Server MCP

WHAT IT DOES

What spawn_net_share does on Cobalt Strike MCP Server

AI agents invoke spawn_net_share 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_net_share needs a policy

While the primary function is enumeration (Read), 'spawn mode' means it actively spawns a new beacon or process on a target system to perform the operation. Spawning processes on compromised hosts is an Execute-level action with significant blast radius in a red team/adversarial context. The Cobalt Strike context elevates severity considerably as this is offensive security tooling with live targets.

From the tool's definition 'spawn mode' indicates the tool spawns a process/beacon to enumerate shares, rather than passively querying; operates within Cobalt Strike red team C2 infrastructure

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spawn_net_share Rate-limited

spawn_net_share 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_net_share": {
      "limits": [
        {
          "counter": "spawn_net_share_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_net_share

What does the spawn_net_share tool do? +

Enumerate shares (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_net_share? +

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

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

Can I rate-limit spawn_net_share? +

Yes. Add a rate_limit block to the spawn_net_share 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_net_share completely? +

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

spawn_net_share 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.