Look up an IOC (IP, domain, URL, or hash) against ThreatFox for malware family attribution. Returns confidence level, IOC type, and threat classification. Args: ioc: Indicator of Compromise — IP address, domain, URL, MD5/SHA256 hash
AI agents call lookup_malware_family to retrieve information from CVE MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries threat intelligence data from ThreatFox to identify malware families associated with indicators of compromise. It performs read-only lookups without creating, modifying, deleting, or executing anything. The blast radius of misuse is low—an attacker could perform reconnaissance or profiling of IOCs but cannot directly compromise systems or data. Classification as Read is appropriate.
From the tool's definition Tool description states it 'Look[s] up an IOC... against ThreatFox for malware family attribution' and 'Returns confidence level, IOC type, and threat classification.' The operation is a query/lookup with no side effects.
Documented attack patterns abuse exactly the kind of access lookup_malware_family gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CVE MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for lookup_malware_family:
{
"version": "1",
"default": "deny",
"tools": {
"lookup_malware_family": {}
}
}lookup_malware_family is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Look up an IOC (IP, domain, URL, or hash) against ThreatFox for malware family attribution. Returns confidence level, IOC type, and threat classification. Args: ioc: Indicator of Compromise — IP address, domain, URL, MD5/SHA256 hash. It is categorised as a Read tool in the CVE MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CVE MCP Server MCP server in PolicyLayer and add a rule for lookup_malware_family: 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 CVE MCP Server. Nothing to install.
lookup_malware_family 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 lookup_malware_family 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 lookup_malware_family. 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.
lookup_malware_family is provided by the CVE MCP Server MCP server (mukul975/cve-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CVE MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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27 CVE MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.