UAC-0099 Is Now Hiding Malware Inside a Fake Notepad++ Plugin to Target Ukrainian Organizations
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 […]
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 emails to deliver malware families including LONEPAGE, MATCHBOIL, and DRAGSTARE.
The latest campaign, observed earlier this summer, uses a trojanized Notepad++ plugin as the infection mechanism. It’s a meaningful change in delivery method for a group that’s been refining its toolset steadily for three years.
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