Rigtigt nok en slemmert. Se evt. en liste her:
http://ca.com/virusinfo/encyclopediaCIH (Also known as Win95.CIH, Spacefiller or Chernobyl)
There are 3 known variants of the CIH virus - all have the same payload but each is triggered on a different date/set of dates:
* Win95.CIH.1003 - Triggers on the 26th of April
* Win95.CIH.1010 - Triggers on the 26th of June
* Win95.CIH.1019 - Triggers on the 26th of every month
The CIH virus infects PE files only under Windows 95/98 i.e. it infects Windows 95/98-only executable files of the PE format, usually 32 bit executables with the .exe extension. (i.e. notepad.exe, explorer.exe, winword.exe etc).
The virus shows very few symptoms as it is clever in its ability to infect files without increasing their length. It may also cause system crashes, although since it is relatively bug free, the virus can spread and remain unnoticed for some time.
The virus has a nasty payload, consisting of 2 parts:
1) The virus tries to destroy the flash BIOS ROM by reprogramming it with garbage. This does not always work.
2) The virus overwrites the contents of the hard disk with garbage, working through a number of sectors of each cylinder of the hard disk.
If the virus succeeds in reprogramming the flash BIOS ROM, there is no software remedy for it: your PC will no longer be bootable and the flash BIOS will need to be replaced or reprogrammed in a special EPROM programming device. Where the flash BIOS ROM is permanently attached to the motherboard, the entire motherboard will need replacing. The damage caused to the information on the hard disk is possibly recoverable by using data recovery services, and the success depends on the disk size, format, fragmentation etc.