Threat Description

SysLock

Details

Aliases:SysLock
Category:Malware
Type:Virus
Platform: W32

Summary



One unusual "feature" of this virus is that it will search the disk for the string "Microsoft" and change it into "MACROSOFT". The virus will not infect programs if the environment contains SYSLOCK=@.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details




Variant:Macho

Two minor variants, which will transform the string "Microsoft" into "MACHOSOFT". One is very close to the original SysLock virus, with only one byte different, but the other has been modified somewhat.


Variant:Advent

Activates in December and plays "Oh, Tannenbaum".


Variant:Cookie!

The last variant is 2232 bytes long and known as "Cookie", because it may display the message

I want a COOKIE!





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