Pierluigi Paganini
July 24, 2026
UAC-0099 delivers malware via a fake Notepad++ plugin after phishing, using a loader that sabotages itself if run without the correct arguments to hinder analysis. CERT-UA published a new advisory attributing a phishing campaign to UAC-0099, a Russia-aligned threat actor active since at least mid-2022 and previously known for exploiting WinRAR vulnerabilities and using phishing […]
Pierluigi Paganini
August 07, 2025
Ukraine’s CERT-UA warns of phishing attacks by UAC-0099 targeting defense sectors, using malware like MATCHBOIL, MATCHWOK, and DRAGSTARE. Ukraine’s CERT-UA warns of phishing attacks by threat actor UAC-0099 targeting government and defense sectors, delivering malware like MATCHBOIL and DRAGSTARE. The National Cyber Incident, Cyber Attack, and Cyber Threat Response Team CERT-UA investigated multiple attacks against […]
Pierluigi Paganini
December 25, 2023
The threat actor UAC-0099 is exploiting a flaw in the WinRAR to deliver LONEPAGE malware in attacks against Ukraine. A threat actor, tracked as UAC-0099, continues to target Ukraine. In some attacks, the APT group exploited a high-severity WinRAR flaw CVE-2023-38831 to deliver the LONEPAGE malware. UAC-0099 threat actor has targeted Ukraine since mid-2022, it was spotted […]
