{
  "site": "https://pwn.watch",
  "generatedAt": "2026-10-22T21:29:54.052Z",
  "tag": {
    "id": "apt28",
    "label": "APT28",
    "isStack": false,
    "url": "https://pwn.watch/t/apt28",
    "feed": "https://pwn.watch/t/apt28/feed.xml"
  },
  "counts": {
    "incidents": 1,
    "live": 0,
    "notFullyPatched": 0,
    "patched": 1
  },
  "incidents": [
    {
      "slug": "microsoft-outlook-ntlm-leak-cve-2023-23397",
      "title": "Outlook zero-click NTLM hash leak used by Russian state hackers (CVE-2023-23397)",
      "url": "https://pwn.watch/i/microsoft-outlook-ntlm-leak-cve-2023-23397",
      "json": "https://pwn.watch/i/microsoft-outlook-ntlm-leak-cve-2023-23397.json",
      "status": "closed",
      "severity": "critical",
      "patchStatus": "patched",
      "product": "Microsoft Outlook for Windows",
      "tags": [
        "microsoft",
        "outlook",
        "ntlm",
        "apt28",
        "zero-click",
        "zero-day",
        "cisa-kev"
      ],
      "cveIds": [
        "CVE-2023-23397"
      ],
      "affectedVersions": [
        "See vendor advisory"
      ],
      "fixedVersions": [
        "See vendor advisory (March 2023 security updates)"
      ],
      "startedAt": "2023-03-14",
      "closedAt": "2023-03-24",
      "updatedAt": "2023-03-24",
      "summary": "A crafted Outlook reminder with a UNC path made Outlook for Windows send the user's NTLM hash to an attacker's server without any click. Microsoft said a Russia-based actor (APT28) used it against European government, transport, energy and military targets.",
      "xPost": null
    }
  ],
  "posts": [],
  "changes": [
    {
      "incident": "microsoft-outlook-ntlm-leak-cve-2023-23397",
      "incidentTitle": "Outlook zero-click NTLM hash leak used by Russian state hackers (CVE-2023-23397)",
      "severity": "critical",
      "status": "closed",
      "patchStatus": "patched",
      "date": "2023-03-24",
      "title": "Microsoft publishes investigation guidance for CVE-2023-23397",
      "body": null,
      "sourceUrl": "https://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/",
      "url": "https://pwn.watch/i/microsoft-outlook-ntlm-leak-cve-2023-23397"
    },
    {
      "incident": "microsoft-outlook-ntlm-leak-cve-2023-23397",
      "incidentTitle": "Outlook zero-click NTLM hash leak used by Russian state hackers (CVE-2023-23397)",
      "severity": "critical",
      "status": "closed",
      "patchStatus": "patched",
      "date": "2023-03-14",
      "title": "Patch Tuesday fix; CISA adds CVE-2023-23397 to KEV",
      "body": null,
      "sourceUrl": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397",
      "url": "https://pwn.watch/i/microsoft-outlook-ntlm-leak-cve-2023-23397"
    }
  ]
}