Threat Description

Apocalipse

Details

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

Summary



This virus was found from Portugal in August 1994. The virus stays resident in memory occupying 2208 bytes of memory, and infects all executed COM and EXE files (except very small ones).

The virus is variably encrypted. This kind of encryption is called oligomorphic.It changes between generations, but can still be found with a search string. The virus inserts dummy instructions to the decryption loop and changes the orders of needed instructions. Also registers are swapped between different generations.

The name of the infected program can be found underneath the encryption. After that the virus contains the following text:

Apocalipse 2.0 por M.A.C.
  Isto e um virus - afaste-se do computador, seno constipa-se !
  Boa sorte nas reparac_es - nada esta perdido...
  Tambem, andavas a trabalhar demais - aproveita para descansar !
  Lembra-te: coisas destas so ajudam a formar caracter - no,
  no precisas de agradecer, e um prazer ajudar...
  Voltarei...
  Preme uma tecla

Which, when translated to english, mean something along these lines:

Apocalypse 2.0 by M.A.C.
  This is a virus - go away from your computer, it has the flu!
  Good luck with the repairing - nothing is lost...
  Also, I don't want you to work too much - remember to rest!
  Incidents like this just make you a stronger person, right?
  No need to thank me, it is a please to help...
  I'll be back...
  Press any key

The virus uses directory-stealth, so the change in the file-size of infected files is not visible as long the virus is resident.

Virus marks infected files by adding 100 years to the date-stamp and setting the seconds field in time-stamp to 62. These changes are not visible in a normal dir-listing.

[Translation: Manuel Del Rio Furio, EICS Spain]



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.








Description Created: Mikko Hypponen, F-Secure


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