Threat Actor

Silent Librarian

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).

13
Techniques
0
indicators on this record

Properties

Last source
MITRE ATT&CK
STIX ID
intrusion-set--90784c1e-4aba-40eb-9adf-7556235e6384
In Signal since
initial import (Sep 2026)
Retrieved at
2026-11-01T16:36:58+00:00
Type
intrusion-set

MITRE ATT&CK Techniques (13)

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Digital Certificates (T1588.004)

Adversaries may buy and/or steal SSL/TLS certificates that can be used during targeting. SSL/TLS certificates are designed to instill trust. They incl

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Domains (T1583.001)

Adversaries may acquire domains that can be used during targeting. Domain names are the human readable names used to represent one or more IP addresse

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Email Accounts (T1585.002)

Adversaries may create email accounts that can be used during targeting. Adversaries can use accounts created with email providers to further their op

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Email Addresses (T1589.002)

Adversaries may gather email addresses that can be used during targeting. Even if internal instances exist, organizations may have public-facing email

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Email Collection (T1114)

Adversaries may target user email to collect sensitive information. Emails may contain sensitive data, including trade secrets or personal information

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Email Forwarding Rule (T1114.003)

Adversaries may setup email forwarding rules to collect sensitive information. Adversaries may abuse email forwarding rules to monitor the activities

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Employee Names (T1589.003)

Adversaries may gather employee names that can be used during targeting. Employee names be used to derive email addresses as well as to help guide oth

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Link Target (T1608.005)

Adversaries may put in place resources that are referenced by a link that can be used during targeting. An adversary may rely upon a user clicking a m

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Password Spraying (T1110.003)

Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials.

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Search Victim-Owned Websites (T1594)

Adversaries may search websites owned by the victim for information that can be used during targeting. Victim-owned websites may contain a variety of

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Spearphishing Link (T1598.003)

Adversaries may send spearphishing messages with a malicious link to elicit sensitive information that can be used during targeting. Spearphishing for

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Tool (T1588.002)

Adversaries may buy, steal, or download software tools that can be used during targeting. Tools can be open or closed source, free or commercial. A to

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Valid Accounts (T1078)

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense

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Silent Librarian — Threat Actor Profile — Ninja Signal | Ninja Signal