Virus Database

Ugra.1394

Description Ugra.1394

It is a very dangerous memory resident parasitic polymorphic virus. It hooks INT 1Ch, 21h and writes itself to the end of EXE files that are executed. The virus does not infect the files *AN, *IT, *AV, *OT, *RU (anti-viruses SCAN, NAV, F-PROT, FINDVIRU).
The virus runs its internal counter that saves in second sector of the hard drive, and depending on this counter the virus erases hard drive sectors, the CMOS, beeps the speaker, disables printing, slows down, halts or reboots the computer.

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Lib.4000

Description Lib.4000

It is a harmless memory resident parasitic virus. It hooks INT 21h and writes itself to the end of EXE files that are accessed. It contains encrypted text strings:
.EXE -V.EXE AIDSTEST TNTVIRUS SCAN DOCTOR DIAG TLINK
LIB TPU TPL ARJ $00 ZIP ARC LZH ICE

and does not infects the files with the names from the first string (starting from -V.EXE). It also checks the file extensions for names from second string, but do nothing with these files.

Liberty.1170

Description Liberty.1170

It is not a dangerous memory resident parasitic virus. It hooks INT 09h, 21h and writes itself to the end of COM files that are executed. The string "Liberty" is placed at the beginning of the infected file. The virus checks the keyboard, and if Alt-Ctrl-Del keys are pressed this virus displays:
WE ARE THE VIRUSES
HAVE ATTACKED YOUR DISKS
LKBERTY S S S S S
CANISIUS COLLEGE

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