Anthropic Admin API Key Deleted

AnalysisType: rule
RuleID: Anthropic.Activity.Admin.API.Key.Deleted
DisplayName: "Anthropic Admin API Key Deleted"
Enabled: true
Filename: anthropic_admin_api_key_deleted.py
LogTypes:
  - Anthropic.Activity
Severity: Medium
Description: >
  Detects when an admin API key is deleted. Unauthorized deletion could
  indicate an attacker revoking legitimate credentials to disrupt operations
  or covering tracks after using a compromised key.
Runbook: |
  1. Find all Anthropic.Activity events by actor:email_address in the 6 hours before and after the alert to determine if this is part of routine key rotation
  2. Check if an admin_api_key_created event occurred near this deletion to determine if this is a key rotation or a standalone deletion
  3. Check if actor:ip_address is associated with known VPN/proxy services or matches previously seen IP addresses for this actor
Tags:
  - Anthropic
  - Credential Access
Reports:
  MITRE ATT&CK:
    - TA0006:T1098.001  # Account Manipulation: Additional Cloud Credentials
Tests:
  - Name: Admin API key deleted
    ExpectedResult: true
    Log:
      {
        "id": "activity_01ABC123",
        "created_at": "2026-05-07T10:00:00Z",
        "organization_id": "org_01XYZ",
        "type": "admin_api_key_deleted",
        "actor": {
          "type": "user_actor",
          "email_address": "admin@example.com",
          "user_id": "user_01ABC",
          "ip_address": "10.0.0.1",
          "user_agent": "Mozilla/5.0"
        }
      }
  - Name: Non-matching event type
    ExpectedResult: false
    Log:
      {
        "id": "activity_01DEF456",
        "created_at": "2026-05-07T10:00:00Z",
        "organization_id": "org_01XYZ",
        "type": "admin_api_key_created",
        "actor": {
          "type": "user_actor",
          "email_address": "admin@example.com",
          "user_id": "user_01ABC",
          "ip_address": "10.0.0.1"
        }
      }


# ------ paired body: anthropic_admin_api_key_deleted.py ------

from panther_anthropic_helpers import anthropic_actor_id, anthropic_alert_context


def rule(event):
    return event.get("type") == "admin_api_key_deleted"


def title(event):
    actor_email = anthropic_actor_id(event)
    return f"Anthropic: Admin API key deleted by [{actor_email}]"


def dedup(event):
    return anthropic_actor_id(event)


def alert_context(event):
    return anthropic_alert_context(event)