Minimax
Description Minimax
It is a harmless nonmemory resident parasitic virus. It searches for .COM files of the current directory and infects them. The feature of this virus consist of the algorithm of the infection: the virus does not append to the end of the file, but reads the file contents into the virus body:
+-------------------------------------------+
¦3 bytes - ¦ file body ¦ virus body ¦
¦jmp to virus ¦ (read buffer) ¦ 122 bytes ¦
+-------------------------------------------+
¦<---------- total - 31125 bytes ---------->¦
The total length of any of infected files is equal to 31125 bytes, if the file length is above than the 'read buffer', the virus does not infect it.
Being executed the infected file searches for not infected .COM file, infects it, then it copies the host file body to the normal position, and jumps to the code of the file.
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Swastika.442
Description Swastika.442
It is not a dangerous nonmemory resident parasitic virus. It searches for .COM files and writes itself to the beginning of the file. It manifests itself with a video effect.
Swine family
Description Swine family
These are memory resident encrypted parasitic viruses. They hook INT 21h, 2Fh and write themselves to the end of COM and EXE files that are accessed. The viruses contain the text string:
COMcomEXEexe
"Swine.3000.b" when executed at 13:05 displays a message in Russian and erases the MBR of the hard drive.
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