Lamento.2690
Description Lamento.2690
It is a very dangerous memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are accessed. While installing the virus also infects the C:COMMAND.COM and C:DOSMODE.COM files. The virus checks the file name, and does not infect the files that begin with any of the strings:
PCVIR CENTINEL SCAN CLEAN VSHIELD ATM TB CPAV MSAV TNT FINDVIR VC VREMOVE
VSMENU VSCHK MM. KEYB.
On January 21st the virus sets the system date to January, 20th, then deletes C:AUTOEXEC.BAT and C:CONFIG.SYS files, renames to the random names all the files in subdirectories of C: drive:
DOS MSDOS SYS DRDOS IBMDOS
WINDOWS WIN WIN3 WIN30 WIN31 WIN311
While processing Windows' directories the virus looks also for SYSTEM subdirectory. Then the virus displays the messages:
Lamento tener que comunicarle que hoy es 21 de Enero all
... ha sido una cortes¡a de Woi
Check other viruses! Be aware! Use Antiviral Software
Phx Family
Description Phx Family
These are very dangerous memory resident parasitic viruses. They hook INT 21h and write themselves to the end of COM and EXE files. Several of the viruses contain the text "PHX".
"Phx.823,1015" hook the INT 21h function Open (AX=3D02h) and check the code of program which performs that call. The viruses compares that code with the list of specified masks, and if that code is in the list, "Phx.823" virus resets computer, "Phx.1015" corrupts the data while writing to the files.
"Phx.965,1289,1336" in some cases change one byte of information while writing to disk file.
PI.2048
Description PI.2048
It is a very dangerous memory resident parasitic virus. It hooks INT 8, 13h, 21h, 24h and writes itself to the end of EXE files that are executed or opened. If the day number is equal to the month number, and the minutes are equal to the hour, the virus formats the disk sectors. The virus contains the text strings:
PI v2.0 (C) 1995 BREAM.
Pretorianie niszcza aby tworzycall
Pozdrowienia dla p. Marka Sella skladaja pracodawcy.
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