Ai22.1659
Description Ai22.1659
It is a harmless memory resident parasitic virus. It installs itself memory resident and replicates only under DOS 5.x and 6.x. It hooks INT 21h and writes itself to the end of .COM and .EXE files that are executed. While installing the virus also infects the C:COMMAND.COM file. The virus does not manifest itself in any way, it contains the ID-text:
Ai22
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Sopron.937
Description Sopron.937
It is a very dangerous memory resident parasitic encrypted virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. On September 8th it erases the MBR of the hard drive and displays the message:
HDD-CLEANER Version 2.0
Copyright (c) 1997 (1st JAN)
Made in Hungary, Sopron
DESTRUCTION IN PROGRESSall
Sorry.256
Description Sorry.256
It is a very dangerous memory resident parasitic virus. It copies itself to DOS data area at address 0060:0000, hooks INT 21h, then it writes itself to the end of COM files that are executed. While executing a EXE file the virus checks the EXE header, and in some cases deletes the file, and displays:
Sorry
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