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This page is part of Threat Matrix, the public browser workspace for the main AdversaryGraph platform. Use it for ATT&CK pivots, actor and technique context, similarity leads, detection coverage review, and analyst-ready investigation paths.

Validation disclaimer: TTP overlap, actor similarity, generated summaries, and coverage findings are investigation leads, not attribution proof or operational validation without analyst review.

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G0122 · 13 ATT&CK techniques · 0 correlated reports

Silent Librarian

Aliases: COBALT DICKENS, Silent Librarian, TA407

[Silent Librarian](https://attack.mitre.org/groups/G0122) 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](https://attack.mitre.org/groups/G0122) 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).(Citation: DOJ Iran Indictments March 2018)(Citation: Phish Labs Silent Librarian)(Citation: Malwarebytes Silent Librarian October 2020)

Open interactive actor investigation

ATT&CK techniques

T1078T1110.003T1114T1114.003T1583.001T1585.002T1588.002T1588.004T1589.002T1589.003T1594T1598.003T1608.005

Correlated CTI and IR reports

Continue the investigation

Interactive AdversaryGraph AdversaryGraph documentation CTI Analyst Field Manual Israel Threat Actors CTI Anomaly Detection Atlas Insider Threat Detection Guide 1200km Medium research

Attack tools, simulations and detection rules

Follow explicit source relationships into the reference modules. Linked procedures and detectors are not claims of live validation or actor attribution.

T1078 Valid Accounts simulation — Exact active technique ID
T1078 detection rules — Exact active technique ID; not actor-specific detector coverage
T1110.003 Password Spraying simulation — Exact active technique ID
T1110.003 detection rules — Exact active technique ID; not actor-specific detector coverage
T1114 Email Collection simulation — Exact active technique ID
T1114 detection rules — Exact active technique ID; not actor-specific detector coverage
T1114.003 Email Forwarding Rule simulation — Exact active technique ID
T1114.003 detection rules — Exact active technique ID; not actor-specific detector coverage
T1583.001 Domains simulation — Exact active technique ID
T1583.001 detection rules — Exact active technique ID; not actor-specific detector coverage
T1585.002 Email Accounts simulation — Exact active technique ID
T1585.002 detection rules — Exact active technique ID; not actor-specific detector coverage
T1588.002 Tool simulation — Exact active technique ID
T1588.002 detection rules — Exact active technique ID; not actor-specific detector coverage
T1588.004 Digital Certificates simulation — Exact active technique ID
T1588.004 detection rules — Exact active technique ID; not actor-specific detector coverage
T1589.002 Email Addresses simulation — Exact active technique ID
T1589.002 detection rules — Exact active technique ID; not actor-specific detector coverage
T1589.003 Employee Names simulation — Exact active technique ID
T1589.003 detection rules — Exact active technique ID; not actor-specific detector coverage
T1594 Search Victim-Owned Websites simulation — Exact active technique ID
T1594 detection rules — Exact active technique ID; not actor-specific detector coverage
T1598.003 Spearphishing Link simulation — Exact active technique ID
T1598.003 detection rules — Exact active technique ID; not actor-specific detector coverage
T1608.005 Link Target simulation — Exact active technique ID
T1608.005 detection rules — Exact active technique ID; not actor-specific detector coverage

Cyber Knowledge routes

These contextual routes explain behaviors associated with this ATT&CK group record. They support learning and investigation planning; they do not add attribution evidence.

Module 1 — Foundations: What CTI Is
Cyber Threat Intelligence (CTI) · explicit-name Module 4 — Collection Sources
Cyber Threat Intelligence (CTI) · explicit-name Module 5 — Analysis Techniques Tradecraft
Cyber Threat Intelligence (CTI) · explicit-name Module 7 — Intelligence Products Sharing
Cyber Threat Intelligence (CTI) · explicit-name Module 9 — Tools of the Trade
Cyber Threat Intelligence (CTI) · explicit-name Module 2 — Reconnaissance and attack-surface mapping
Red Team & Offensive Security · explicit-name Module 6 — Active Directory and identity attack paths
Red Team & Offensive Security · explicit-name Module 13 — Red-team infrastructure and operations
Red Team & Offensive Security · explicit-name Network behavior, protocols, and configuration recovery
Malware Analysis & Reverse Engineering · explicit-name Shared responsibility, governance, and service ownership
Cloud Security · explicit-name Posture management, exposure, vulnerabilities, attack paths, and validation
Cloud Security · explicit-name Cloud incident response, forensics, containment, and recovery
Cloud Security · explicit-name