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On the first day of every month, at 5:00 pm, the worm uses SHUTDOWN.EXE to initiate a shutdown and show a popup with text Kagou-anti-Kro$oft says not today!. A minimized window often appears on startup with the title "Driver Memory Error". Another message saying "S3 Driver Memory Alloc Failed!" occasionally pops up. The worm also adds a registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cAg0u and edits AUTOEXEC.BAT to make Windows launch it on startup.
The worm adds these commands to AUTOEXEC.BAT:
@ECHO off C:\Windows\Start Menu\Programs\StartUp\kak.hta DEL C:\Windows\Start Menu\Programs\StartUp\kak.hta
- "Kak Worm - An Internet Virus by Mayur Kamat". Retrieved 2015-06-07.
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