Slost.596
Description Slost.596
It is a harmless nonmemory resident parasitic virus. It searches for COM files, then writes itself to the end of the file. The virus uses anti-debugging tricks, and contains the text strings:
*.com
* LOST *
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MutInt Family
Description MutInt Family
These are dangerous memory resident encrypted parasitic viruses. They hook INT 21h and write themselves to the end of COM files that are executed. Sometimes these viruses infect the files incorrectly, these files halt the computer being executed.
While infecting the viruses encrypt their bodies with new method: they search for INT 21h (CD21h) opcodes in their codes, and replace them with opcode CDxxh, where 'xx' is a random selected byte. While executing the viruses replace these CDxxh back to CD21h.
These infectors contain the text string:
The Mutating Interrupt Virus RABID`S Back and Kicking in `93 -Soltan Griss-
Mvf.1866
Description Mvf.1866
This is a harmless memory resident encrypted parasitic virus. It hooks INT 21h and writes itself to the end of COM files. It contains the mask string "*.COM".
Sometimes it displays the message:
THE MVF-FILEVIRUS
Programmed 1991 by the MVF
MAD Virus Factory
It also contains the text string:
No. 0001" or "28/9/91 - V1.6
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