PseudoManuscrypt

aliases

Last seen:Mar 17, 2026

Intelligence Profile

According to PCrisk, PseudoManuscrypt is the name of the malware that spies on victims. It is similar to another malware called Manuscrypt. We have discovered PseudoManuscrypt while checking installers for pirated software (one of the examples is a fake pirated installer for SolarWinds - a network monitoring software).

Threat Analysis

PseudoManuscrypt is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.

External References

→https://asec.ahnlab.com/en/31683/

→https://ics-cert.kaspersky.com/reports/2021/12/16/pseudomanuscrypt-a-mass-scale-spyware-attack-campaign/

→https://medium.com/@lcam/updates-from-the-maas-new-threats-delivered-through-nullmixer-d45defc260d1

→https://securelist.com/nullmixer-oodles-of-trojans-in-a-single-dropper/107498/

→https://www.bitsight.com/blog/zero-50k-infections-pseudomanuscrypt-sinkholing-part-1

Quick Facts

TypeAPT / Threat Group

Aliases2

Also Known As

PseudoManuscryptwin.pseudo_manuscrypt

External Intelligence

Malpedia: win.pseudo_manuscrypt

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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