Parse ShimCache (AppCompatCache) entries from the registry on a Windows host. Note: Presence of a ShimCache entry may not indicate actual execution—only that the file was accessed or observed by the system. Args: client_id: Velociraptor client ID. org_id: Optional Velociraptor org ID for multi-te...
AI agents call windows_execution_shimcache to retrieve information from Velociraptor MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a forensic triage tool that queries existing system artifacts without side effects. It retrieves historical execution/file access data from the Windows registry for analysis purposes. The note clarifying that ShimCache presence doesn't confirm execution reinforces that this is passive data collection. No write, destructive, execute, or financial operations are possible with this tool.
From the tool's definition Tool parses and retrieves ShimCache registry entries from a Windows host. Description explicitly states it returns 'ShimCache (AppCompatCache) artifact results' with optional field filtering.
Documented attack patterns abuse exactly the kind of access windows_execution_shimcache gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Velociraptor MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for windows_execution_shimcache:
{
"version": "1",
"default": "deny",
"tools": {
"windows_execution_shimcache": {}
}
}windows_execution_shimcache is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Parse ShimCache (AppCompatCache) entries from the registry on a Windows host. Note: Presence of a ShimCache entry may not indicate actual execution—only that the file was accessed or observed by the system. Args: client_id: Velociraptor client ID. org_id: Optional Velociraptor org ID for multi-tenant deployments. Fields: Comma-separated list of fields to return. Returns: ShimCache (AppCompatCache) artifact results as a string or error message. It is categorised as a Read tool in the Velociraptor MCP MCP Server, which means it retrieves data without modifying state.
Register the Velociraptor MCP server in PolicyLayer and add a rule for windows_execution_shimcache: 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 Velociraptor MCP. Nothing to install.
windows_execution_shimcache is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the windows_execution_shimcache 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 windows_execution_shimcache. 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.
windows_execution_shimcache is provided by the Velociraptor MCP server (mgreen27/mcp-velociraptor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Velociraptor MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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28 Velociraptor MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.