{
  "id": "CASE-2026-1002",
  "memory_type": "case",
  "scenario": "o365_suspicious_login",
  "title": "Legacy protocol sign-in from unfamiliar IP blocked by policy",
  "abstract": "Legacy authentication attempt from a cloud IP was blocked; investigation tied it to an approved migration tool test.",
  "verdict": "false_positive",
  "severity": "medium",
  "entities": {
    "users": [
      "svc-migration@corp.example"
    ],
    "hosts": [],
    "mailboxes": [
      "svc-migration@corp.example"
    ]
  },
  "observables": {
    "ips": [
      "192.0.2.24"
    ],
    "domains": [],
    "urls": [],
    "hashes": []
  },
  "evidence": [
    "The account is a known migration service account.",
    "Source IP matched approved cloud migration vendor range.",
    "No successful sign-in occurred due to policy block."
  ],
  "patterns": [
    "verdict:false_positive",
    "scenario:o365_suspicious_login",
    "alert_type:azuread_legacy_auth_attempt"
  ],
  "related_refs": {
    "playbooks": [
      "PB-O365-LOGIN-001"
    ],
    "kb": [
      "KB-O365-LEGACY-AUTH"
    ],
    "cases": []
  },
  "source_path": "/home/tom/soc_memory_poc/evaluation/datasets/mock_cases/o365_suspicious_login/CASE-2026-1002.json",
  "tags": [
    "o365",
    "login",
    "false-positive",
    "legacy-auth"
  ]
}