Virus Database

BAT.Shadow.1232

Description BAT.Shadow.1232

This is a path companion BAT virus. It does not change batch files but instead creates new batches with the same names as ones further down, so when an infected batch is run from out of a path directory the virus runs first and searches for more batch files to infect them before running the host batch. Delete the hidden batch files from path directories to remove this virus.
This virus infects one batch in each path directory each run by copying a copy of this batch to the same filename but in an earlier path directory. After infecting 35 batch files it displays the message:
ShadowBat 1997

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BadBoy.1000.c

Description BadBoy.1000.c

This is a harmless memory resident parasitic encrypted virus. It hooks INT 21h and writes itself at the beginning of COM files are executed. This virus uses System File Table on infection. It is divided on 9 blocks of code and data (installation block, data block, INT 21h block e.t.c.). When the virus installs itself into the memory, 8 of these 9 blocks can be rearranged in any order depending on the system timer. On infection the virus saves encrypted image of its TSR copy into the file, so orders of code blocks in two infected file can be different.
The virus contains the text:
Pile of shit
The Worthless Piece of shit virus that is a joke.

BadBoy.1001.a

Description BadBoy.1001.a

This is a harmless memory resident parasitic encrypted virus. It hooks INT 21h and writes itself at the beginning of COM files are executed. This virus uses System File Table on infection. It is divided on 9 blocks of code and data (installation block, data block, INT 21h block e.t.c.). When the virus installs itself into the memory, 8 of these 9 blocks can be rearranged in any order depending on the system timer. On infection the virus saves encrypted image of its TSR copy into the file, so orders of code blocks in two infected file can be different.
The virus contains the text:
Make me better!
The Bad Boy virus, Version 2.0, Copyright (C) 1991

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