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Intrusion setG0122

Silent Librarian

Also tracked as TA407, COBALT DICKENS

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).

Documented techniques
13
First seen
2013
Basis
MITRE ATT&CK

How they break in

Techniques MITRE has documented this group using, grouped by the stage of an attack they belong to. This is the actionable half: each one is a behaviour you can look for in your own logs, and a control you can test.

reconnaissance4

resource development5

credential access1

collection2

stealth1

Source: MITRE ATT&CK View the original record · Last synchronised 2026-09-09 · Origin and motivation are read from MITRE’s own description and are not structured fields in ATT&CK. Where the text does not attribute a group, this page leaves them blank rather than guessing.