DirVirus.760
Description DirVirus.760
This is a memory-resident dangerous parasitic virus. It hooks INT 21h and infects COM files upon calling the functions FindFirst and FindNext FCB (these functions are used by the DIR command, that gave the name to the virus). The virus appends itself to the end of files, altering 6 bytes at their beginning (PUSH Loc_Virus; RET). This infector removes and does not restore the "read-only" attribute, set the file creation time to 60 sec. Sometimes it erases the FAT.
"DirVirus.760" contains the internal text strings:
COMMAND.COM
SBK (C) 1989 Varna. All rights reserved.
MANOWAR
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Imi.1536.e
Description Imi.1536.e
This is a benign memory resident parasitic viruses. It hooks INT 21h, and writes itself to the end of COM and EXE files that are executed. It contains the string "commandCOMMAND", and does not infect the COMMAND.COM file. On the 30th of March, it displays the following message:
Hello!This is IMI 1.0b virus!
Imi.1536.f
Description Imi.1536.f
This is a benign memory resident parasitic viruses. It hooks INT 21h, and writes itself to the end of COM and EXE files that are executed. It contains the string "commandCOMMAND", and does not infect the COMMAND.COM file. On the 30th of March, it displays the following messages:
Hello!This is IMI 1.0b virus!
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