Execute NetExec SMB protocol commands for Windows enumeration, credential validation, command execution, and credential dumping. Supports pass-the-hash attacks.
AI agents invoke nxc_smb 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.
This tool enables execution of arbitrary commands on remote Windows systems via SMB, making it Execute rather than Read or Write. The ability to dump credentials and perform pass-the-hash attacks means an AI agent could compromise authentication systems, establish persistent access, or pivot through a network.
From the tool's definition Tool description explicitly states 'command execution' and 'credential dumping' as capabilities, and mentions 'pass-the-hash attacks'. NetExec is a penetration testing framework that executes arbitrary commands against remote systems via SMB protocol.
Attacks that exploit this kind of access
Execute NetExec SMB protocol commands for Windows enumeration, credential validation, command execution, and credential dumping. Supports pass-the-hash attacks. 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.
Register the Sec Netexec MCP server in PolicyLayer and add a rule for nxc_smb: 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.
nxc_smb is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the nxc_smb 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.
Set action: deny in the PolicyLayer policy for nxc_smb. 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.
nxc_smb 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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