nxc_spray · Sec Netexec MCP: Risk & Policy

WHAT IT DOES

What nxc_spray does on Sec Netexec

AI agents invoke nxc_spray to trigger actions in Sec Netexec. 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 nxc_spray needs a policy

Password spraying is an executable attack that performs credential testing against network targets. While it doesn't directly delete or move money, it actively exercises external systems in ways that can cause operational harm (account lockouts, IDS alerts, security incidents).

From the tool's definition Tool enables 'password spraying attacks across multiple targets' — an active offensive operation that attempts unauthorized authentication, triggering external security systems and potentially locking accounts or triggering alerts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nxc_spray Rate-limited

nxc_spray 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": {
    "nxc_spray": {
      "limits": [
        {
          "counter": "nxc_spray_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 Sec Netexec, so you can run agents against it safely.

FAQ

Questions about nxc_spray

What does the nxc_spray tool do? +

Perform password spraying attacks across multiple targets with configurable options. It is categorised as a Execute tool in the Sec Netexec MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nxc_spray? +

Register the Sec Netexec MCP server in PolicyLayer and add a rule for nxc_spray: 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 Sec Netexec. Nothing to install.

What risk level is nxc_spray? +

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

Can I rate-limit nxc_spray? +

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

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

nxc_spray is provided by the Sec Netexec MCP server (schwarztim/sec-netexec-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.