3sg.7z -

According to an article from Ars Technica , the 7-Zip utility contained a flaw that allowed attackers to bypass Windows' security feature. Key Details of the Vulnerability

Attackers used a nested archive technique (an archive inside another archive). While the outer file (like 3sg.7z ) would be flagged by Windows as downloaded from the internet, the inner archive would not inherit this "Mark of the Web" tag. 3sg.7z

This vulnerability was patched in 7-Zip version 25.00 . Users are strongly advised to update to the latest version via the official 7-zip.org site to ensure they are protected. Safety Warning According to an article from Ars Technica ,

Opening it reveals an inner archive (sometimes disguised with Cyrillic characters to look like a document). This vulnerability was patched in 7-Zip version 25

This allowed malicious files inside the inner archive to be executed without triggering standard Windows security warnings, such as SmartScreen. Attack Sequence: User downloads a malicious file like 3sg.7z .

Be cautious of sites like 7zip.com (note the .com extension), as Malwarebytes has reported that these fake download sites distribute trojanized versions of the software that can turn your PC into a proxy node for cybercriminals. Have you to the latest version recently?

This inner file triggers an automatic download of a final malware payload, bypassing MotW restrictions entirely.