Virus Database

Dima.1024

Description Dima.1024

It is a non dangerous non memory resident virus which scans the subdirectory tree and hits .COM- and .EXE-files it finds. At 21:00 Dima types: "9pm". It also contains the texts: "The -9pm-. Call the Dima & Dima corporation if it will be difficult.", ".com", ".exe".

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ExeHeader family

Description ExeHeader family

These are memory resident parasitic viruses. They write themselves into free space ("cave") in EXE header, and the length of the file does not grow while infecting.
The viruses contain the text strings:
"Bane.256": [Bane]
"Bosco.a": BOSCO
"Bosco.b,d:" BOSCO D'SOUZA
"Bosco.c": ROYDEN D'SOUZA
"Dina.271": Dina v4.4r
"Dina.283": Dina v4.2r
"Dragon.400": DRAGON-2 Anti
"HeaderBug.324": C:DOSSMARTDRV.EXE =HeaderBug=
"Hobbit.416": HOBBIT
"Mike.252": (c) MIKE.
"Morality": MORALITY
"Mz1": Mz1 Copyright (c) 1992 by Ç¡ñ á
"Renegade.416": Renegade
"Retro": [Dying_Oath] by Retro
"Vlad.337": [Serrelinda], Rhince/VLAD
"XAM.278": XAM

"ExeHeader.VVM,222, 223, and 384" hook INT 13h, and infect files when the sector is reading/writing via INT 13h, and this sector contains a EXE header. These viruses use a stealth algorithm on the INT 13h level.
"ExeHeader.396" is a dangerous virus. It hooks INT 21h, and infects the files that are executed. It converts EXE files to COM format. After the 256th successful infection, the virus erases the disk sectors.
"ExeHeader.440" is a dangerous virus. It hooks INT 1Ch and 21h, and writes itself into EXE files that are executed or opened. In some cases, it infects COM files also, infects them the same as EXEs, and these files become corrupted. Depending on its internal counter, this virus manifests itself with a video effect.
ExeHeader.AntiArj
These viruses corrupt the sectors that contain the ARJ archive header.
ExeHeader.Clust
These are encrypted viruses. They contain the texts:
"Clust.a": [Clust2] JT / TridenT
"Clust.b": [Clust2B]
"Clust.c": [Clust2C]

ExeHeader.Bosco
These viruses search and delete the *.CHK files.
ExeHeader.Dragon.400
This is a stealth virus. It installs itself as a device driver, and intercepts the write and read calls to device drivers. If the accessed data contain a EXE stamp (MZ) at the beginning, the virus inserts itself into these data.
ExeHeader.Joan
This virus is very similar to "ExeHeader.Pure" (see below). It contains the text string:
> Joan v1.2 by KiKo NoMo of T.N.T. Taipei/Taiwan 1995/08 <

ExeHeader.Ming
In some cases, it corrupts files. Depending on system time, it displays the following message:
Written By Crazy Lord (Ming)
Made In Hong Kong

ExeHeader.Olya
This is a dangerous stealth virus. On April 26th, it overwrites the disk sectors with the string:
Olya Kibina

ExeHeader.Pure
These viruses install themselves into the High Memory Area by using a INT 2Fh function. Then these viruses trace and hook INT 13h. These are stealth viruses.
ExeHeader.SkidRow
When installing their TSR copies, these viruses copy themselves into one of the system buffers, and hook INT 13h. If the date and month number correspond, they display the following messages:
"ExeHeader.SkidRow.415,427":
This is Skid-Row Virus
Written by Dark Slayer
* in Keelung. Taiwan *

"ExeHeader.SkidRow.432":
This is Skid-Row Virus
Written by Dark Slayer
% in Keelung. Taiwan %

ExeHeader.XAM.278
This virus hooks INT 16h, and upon each keyboard stroke, it checks the system buffers for a EXE file header. If some of the buffers contain the EXE file header, the virus copies itself into that buffer.

Exile.255

Description Exile.255

It's a dangerous memory resident parasitic virus. It copies itself into the Interrupt Vectors Table, hooks INT 21h and writes itself to the beginning of COM-files that are executed. On installation depending on host file's data it erases the disk sectors and displays:
I'm Vindictive Exile!

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