{
  "id": "silent-librarian",
  "name": "Silent Librarian",
  "aliases": [
    "TA407",
    "COBALT DICKENS"
  ],
  "domain": "cyber",
  "country": "IRN",
  "category": "State-sponsored cyber threat group",
  "status": "tracked",
  "fielded": null,
  "operators": [
    "IRN"
  ],
  "summary": "Silent Librarian is a group that has targeted research and proprietary data at universities, government agencies, and private sector companies worldwide since at least 2013. Members of Silent Librarian are known to have been affiliated with the Iran-based Mabna Institute which has conducted cyber intrusions at the behest of the government of Iran, specifically the Islamic Revolutionary Guard Corps (IRGC).",
  "specs": [
    {
      "k": "sponsor",
      "v": "Iran-based Mabna Institute, acting for the IRGC",
      "src": [
        "mitre-g0122"
      ],
      "conf": "high"
    },
    {
      "k": "active_since",
      "v": 2013,
      "src": [
        "mitre-g0122"
      ],
      "conf": "medium",
      "note": "At least 2013"
    },
    {
      "k": "attack_id",
      "v": "G0122",
      "src": [
        "mitre-g0122"
      ],
      "conf": "high"
    },
    {
      "k": "targets",
      "v": "Silent Librarian is a group that has targeted research and proprietary data at universities, government agencies, and private sector companies worldwide since at least 2013.",
      "src": [
        "mitre-g0122"
      ],
      "conf": "medium"
    },
    {
      "k": "techniques_count",
      "v": 13,
      "src": [
        "mitre-g0122"
      ],
      "conf": "high",
      "note": "ATT&CK v20.1"
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "cyber",
  "image": null,
  "verified": null,
  "notes": "Silent Librarian is a group that has targeted research and proprietary data at universities, government agencies, and private sector companies worldwide since at least 2013. Members of Silent Librarian are known to have been affiliated with the Iran-based Mabna Institute which has conducted cyber intrusions at the behest of the government of Iran, specifically the Islamic Revolutionary Guard Corps (IRGC). Description adapted from MITRE ATT&CK®, © The MITRE Corporation, used under the ATT&CK Terms of Use.",
  "changelog": [
    {
      "date": "2026-11-08",
      "change": "Entry created from MITRE ATT&CK Enterprise v20.1 (group G0122)"
    }
  ],
  "url": "https://www.defensepedia.com/systems/silent-librarian.html",
  "sources": {
    "mitre-g0122": {
      "title": "Silent Librarian, Group G0122",
      "publisher": "MITRE ATT&CK",
      "url": "https://attack.mitre.org/groups/G0122/",
      "published": "2026-07-31",
      "tier": 2,
      "checked": "2026-11-08"
    }
  }
}