Dump all Kerberos tickets from memory (current or all sessions). Extracts tickets from the current logon session or, with elevation, from all logon sessions on the system. Tickets are output as base64-encoded kirbi format.
AI agents call rubeus_dump to retrieve information from Rubeus MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads Kerberos tickets from memory and outputs them in base64-encoded format. While it is purely a Read operation with no side effects on the system, it poses high security risk because stolen Kerberos tickets can be replayed to impersonate users and move laterally within a domain.
From the tool's definition 'Dump all Kerberos tickets from memory (current or all sessions)' — the tool extracts and outputs tickets without modifying, deleting, or executing code. The verb 'dump' and 'extract' indicate retrieval of data.
Attacks that exploit this kind of access
Dump all Kerberos tickets from memory (current or all sessions). Extracts tickets from the current logon session or, with elevation, from all logon sessions on the system. Tickets are output as base64-encoded kirbi format. It is categorised as a Read tool in the Rubeus MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Rubeus MCP Server MCP server in PolicyLayer and add a rule for rubeus_dump: 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 Rubeus MCP Server. Nothing to install.
rubeus_dump 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 rubeus_dump 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 rubeus_dump. 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.
rubeus_dump is provided by the Rubeus MCP Server MCP server (schwarztim/sec-rubeus-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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