: Upon extraction, a hidden malicious file is placed in C:\Users\[User]\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup .
: The malware executes automatically upon the next system login without requiring administrative privileges. LinkUserPassExtractor.rar
: Once active, the payload (often a obfuscated Batch or PowerShell script) connects to a remote server to download additional malware, such as info-stealers or backdoors. Recommended Actions : Upon extraction, a hidden malicious file is
Recent campaigns have used specially crafted RAR files to bypass the user's intended extraction folder. If extracted with a vulnerable version of WinRAR (7.12 or earlier), the archive can silently write malicious files—such as .bat , .lnk , or .exe files—directly into the Windows Startup directory or %TEMP% folders. : Upon extraction
If this archive follows patterns observed in 2025-2026 campaigns: