APT / THREAT GROUP

FoalShell

aliases

Last seen:Mar 17, 2026

Intelligence Profile

According to BI.ZONE, FoalShell is a simple reverse shell used by Cavalry Werewolf, written in Go, C++, and C#. FoalShell allows attackers to execute arbitrary commands in the cmd.exe command line interpreter on a compromised host.

Threat Analysis

FoalShell 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://bi-zone.medium.com/cavalry-werewolf-raids-russias-public-sector-with-trusted-relationship-attacks-e19f7a5c83ef

Quick Facts

TypeAPT / Threat Group

Aliases2

Also Known As

win.foalshellFoalShell

External Intelligence

Malpedia: win.foalshell

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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