Virus Database

BlackFlash.813

Description BlackFlash.813
This is the dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of EXE files that are executed. The virus does not infect files: TB*, SC*, KR*, WI*, F-* (anti-virus programs and Windows). The virus has bugs and may corrupt files while infecting them, or halt the system while installing memory resident. The virus contains the text strings:
G:LoGiNLoGiN.eXe
FAIRGROUND (c) BlackFlash!

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Antibase.1900

Description Antibase.1900

It's a not dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself at the beginning of COM- and into the middle of EXE-files which are accessed. It displays the message:
********************************
<<<< AntiDBASE by Michael >>>>
********************************
So what?
So fuckin' what?
I've been a nasty, I've been a brighter
I've been a wizz for two - So what?
And I've been here, I've been there
And I've been here and fuckin' there - So what?
_______________________
So What, Metallica 1992

It contains the additional text strings:
Kill'em all
Seek&Destroy
This program is written in the city of Sofia by Michael.
March 1994
HEY,STUPID,GET AWAY**Unallocated

Anticmos

Description Anticmos

It is a dangerous boot and MBR infector. On booting from infected floppy it infects the MBR of the hard drive, then it hooks INT 13h and infects the boot sector of the floppy disks. While infecting a disk the virus does not save the original sector. Sometimes it erases the CMOS memory.
"Anticmos.Lixi" contains the string:
I am Li Xibin!

The virus infection routine is a little bit buggy: while infecting boot sectors on floppy drives it overwrites a part of boot sector system data (miscellaneous fields: volume label, serial number, file system ID, and some other fields that are useful on hard drive boot sector only). These data are overwritten by virus installation routine.
While disinfecting affected floppy disks many anti-virus programs leave this part of virus code as-is, and these "virus traces" can be detected by other anti-virus programs (for example, AVP detects them as an unknown variant of "Anticmos" virus). The AVP anti-virus disinfection routine cleans the virus correctly: it removes not only the rest of virus code, but this installation routine too, and floppy disks disinfected by AVP do not cause any alarms.

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