APT / THREAT GROUP

GONEPOSTAL

aliases

Last seen:Mar 17, 2026

Intelligence Profile

The malware consists of a dropper DLL and an obfuscated, password protected VbaProject.OTM file, which houses macros written for Microsoft Outlook. The malware was originally written by Greg Linares as a backdoor POC called Cordyceps, and presented at Hushcon in 2017.

Threat Analysis

GONEPOSTAL 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://lab52.io/blog/analyzing-notdoor-inside-apt28s-expanding-arsenal/

→https://prezi.com/view/eZ3CSNMxPMOfIWEHwTje/

→https://strikeready.com/blog/apt28s-campaign-leveraging-cve%E2%80%912026%E2%80%9121509-and-cloud-c2-infrastructure/

→https://www.kroll.com/en/publications/cyber/fancy-bear-gonepostal-espionage-tool-backdoor-access-microsoft-outlook

→https://www.trellix.com/blogs/research/apt28-stealthy-campaign-leveraging-cve-2026-21509-cloud-c2/

Quick Facts

TypeAPT / Threat Group

Aliases4

Also Known As

CordycepsNOTDOORwin.gonepostalGONEPOSTAL

External Intelligence

Malpedia: win.gonepostal

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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