UNC5125
UNC5125 (aka FlyingYeti, UAC-0149) is a Russia-linked threat cluster reported by Google Threat Intelligence Group (GTIG) as part of broader Russian operations focused on battlefield technology, secure communications, and direct attacks on Ukrainian and allied defense assets. UNC5125 has conducted highly targeted campaigns against Ukrainian frontline drone (UAV) units, including using a Google Forms-hosted questionnaire to reconnoiter prospective drone operators. UNC5125 distributed malware via messaging apps, including MESSYFORK (aka COOKBOX) delivered to a UAV operator in Ukraine. The cluster also used an Android malware family named GREYBATTLE—described as a bespoke version of the Hydra banking trojan—to steal credentials and data, and distributed GREYBATTLE via a website spoofing a Ukrainian military artificial intelligence company.
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Targeting
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Who they target
Sectors the actor has been observed targeting.
- Capital Goods
Where they target
Geographies tied to known operations.
- 🇺🇦 Ukraine
Tradecraft
1 distinct technique observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
Associated malware families
3 malware families attributed to this actor across reporting.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Russian cluster described as focusing on battlefield technology, secure communications, and attacks on Ukrainian and allied defense assets.
Targeting of frontline Ukrainian drone units using Google Forms-based lures to deliver malware.
Highly targeted operations against Ukrainian frontline UAV/drone units, combining reconnaissance (questionnaires) with malware delivery via messaging apps and spoofed websites to steal credentials/data.
The version that knows your environment.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.