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
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
N/A
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