CTI · reviewed · 2026-10-09

Evolution of MATCHBOIL Downloader by UAC-0099

Full story & timeline

MITRE ATT&CK

• T1193 Spearphishing Attachment Initial Access
• T1105 Ingress Tool Transfer Command and Control
• T1027 Obfuscated Files or Information Stealth
• T1497 Virtualization/Sandbox Evasion Stealth

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://www.welivesecurity.com/en/eset-research/matchboil-new-tricks-same-old-evil-intentions/
• https://cyberworldops.eu/en/matchboil-s-two-minute-check-ins-expand-access-risks-for-ukrainian