update_listener_dns · Cobalt Strike MCP Server MCP

WHAT IT DOES

What update_listener_dns does on Cobalt Strike MCP Server

AI agents use update_listener_dns to create or update resources in Cobalt Strike MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Cobalt Strike MCP Server environment.

WHY IT NEEDS A POLICY

Why update_listener_dns needs a policy

Updating a listener is a Write operation (modifies existing configuration reversibly). However, in a red team C2 context, modifying a DNS listener could redirect beacon communications, alter active implant callbacks, or disrupt ongoing operations — giving it high severity. The server context (Cobalt Strike, 200+ red team tools) amplifies the blast radius significantly.

From the tool's definition 'Update a DNS listener' — modifies an existing DNS listener configuration in Cobalt Strike

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_listener_dns Rate-limited

update_listener_dns stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_listener_dns": {
      "limits": [
        {
          "counter": "update_listener_dns_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 update_listener_dns

What does the update_listener_dns tool do? +

Update a DNS listener. It is categorised as a Write tool in the Cobalt Strike MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_listener_dns? +

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

update_listener_dns is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_listener_dns? +

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

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

update_listener_dns 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.