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Blackcom is a trojan on Microsoft Windows.

Behavior

When activated, it displays a fake error message from MSWORD.exe, pauses, and displays a binary fake error message, followed by Microsoft Sam saying:

 CAUTION! A virus has been detected.

Blackcom then displays more fake error messages with one regarding svchost.exe, pauses, and intiates a system shutdown in 10 seconds that corrupts hall.dll the system32 directory, rendering Windows unavailable to boot.

Payloads

In addition, Blackcom will change the internet homepage to a YouTube screamer.