MESSYFORK
MESSYFORK (also referred to as COOKBOX) is malware used in Russia-linked operations targeting Ukraine’s defense/battlefield ecosystem. In reporting cited in the provided content, MESSYFORK was used for reconnaissance and malware delivery, including in campaigns attributed to UNC5125 (aka FlyingYeti/UAC-0149) that focused on frontline drone units and UAV operators. Delivery methods mentioned include lures via Google Forms-hosted questionnaires and distribution via messaging apps to a UAV operator. The content does not provide additional technical details on MESSYFORK’s internal capabilities beyond its role in reconnaissance and as a delivery mechanism, nor does it list specific indicators of compromise for this malware.
Hunt this family in your stack
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
Groups observed using it
2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
"...distributed via messaging apps malware like MESSYFORK (aka COOKBOX) to an Unmanned Aerial Vehicle (UAV) operator..."
"...distributed via messaging apps malware like MESSYFORK (aka COOKBOX) to an Unmanned Aerial Vehicle (UAV) operator..."
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Used for reconnaissance and malware delivery.
Malware used by UNC5125 in campaigns targeting frontline drone units via Google Forms lures (no further functional detail provided).
Malware delivered via messaging apps in highly targeted campaigns against Ukrainian UAV/drone operators.
The version that knows your environment.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.