Virus Database

Fist.927

Description Fist.927

It's a harmless memory resident encrypted virus. It infects COM- and EXE-files and MBR of the hard disk in a standard way. The MBR is hit when an infected file is started. The virus saves its part and the MBR sector at the location 0/0/2 (track/head/sector). The virus infects memory while booting from an infected disk. After that it infects files only. The virus hooks INT 13h, 1Ch, 21h.
This virus is a MBR-generation of the "Fist" file viruses.

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NightFreddy.938

Description NightFreddy.938

This is a very dangerous memory resident parasitic virus. It hooks INT 21h, and writes itself to the end of .COM files that are executed or opened. In August, it erases the MBR of the hard drive and corrupts the CMOS. The virus code contains a branch that is never summoned, and this code decrypts and displays the following message:
I'm Freddy, your nightmare

NightKing.1568

Description NightKing.1568

It is a very dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files (except AVG.EXE) that are executed or opened. While infecting a computer the virus stores the current time in the MBR of the hard drive, and one month after infecting the virus reads to the memory the FAT of the C: drive, then corrupts the FAT, displays the message:
+-----------------------------------------------+
¦ Hello dear friend, your computer is attacking ¦
¦ by NIGHT KING I. virus. If do you like your ¦
¦ data very much, don't reset your computer ¦
¦ before midnight ! ¦
+-----------------------------------------------+

then the virus waits till midnight and restores the corrupted data. If the computer is rebooted before midnight the FAT is lost.

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