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Ensure Windows is set to show file extensions so you can see if a "PDF" is actually an EXE .

It modifies the Windows Registry (specifically the Run or RunOnce keys) to ensure the malware restarts every time the computer boots up.

When a user extracts and runs the contents of 23819.rar , the following infection chain typically occurs:

The 23819.rar file is a compressed RAR archive that typically contains a single executable ( .exe ). Its small size—often under 1MB—is characteristic of first-stage droppers designed to bypass basic email filters. 23819.rar Common Extension: .rar (Archive)