MALWARE FAMILY

FudModule

Internal ID: win.fudmodule

aliases

Last seen:Mar 17, 2026

Intelligence Profile

FudModule is a user-mode DLL that gets the ability to read and write arbitrary kernel memory via the BYOVD technique. Its main goal is to turn off Windows system monitoring features, which is done by modifying kernel variables and removing kernel callbacks. Its actions may very likely affect various types of security products, e.g. EDRs, firewalls, antimalware and even digital forensics tools.

Threat Analysis

FudModule is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.

External References

→https://asec.ahnlab.com/ko/40495/

→https://asec.ahnlab.com/wp-content/uploads/2022/09/Analysis-Report-on-Lazarus-Groups-Rootkit-Attack-Using-BYOVD_Sep-22-2022.pdf

→https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/

→https://decoded.avast.io/luiginocamastra/from-byovd-to-a-0-day-unveiling-advanced-exploits-in-cyber-recruiting-scams/

→https://securityintelligence.com/posts/defensive-considerations-lazarus-fudmodule/

→https://securityintelligence.com/posts/direct-kernel-object-manipulation-attacks-etw-providers/

→https://web.archive.org/web/20240418121020/https://decoded.avast.io/luiginocamastra/from-byovd-to-a-0-day-unveiling-advanced-exploits-in-cyber-recruiting-scams/

→https://www.gendigital.com/blog/news/innovation/lazarus-fudmodule-v3

→https://www.mandiant.com/resources/blog/lightshift-and-lightshow

→https://www.microsoft.com/en-us/security/blog/2024/08/30/north-korean-threat-actor-citrine-sleet-exploiting-chromium-zero-day/

Quick Facts

TypeMalware Family

Aliases1

Also Known As

win.fudmodule

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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