A potential victim receives essentially phishing emails that allegedly contain official files in common DOCX and PDF formats: decisions and orders, methodological guidelines, notes and resumes.
The letters will actually contain a document, but when the user opens this attachment, a special UltraVNC client will start downloading to the computer in the background – a legitimate application for remotely connecting to a computer. That is, hackers use fairly legitimate software, not viruses, to break into the target infrastructure.
Cybercriminals try to gain full control over the system, copy files and monitor all user actions.
Source: Ferra
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