Rch.1217
Description Rch.1217
This is a benign memory resident polymorphic parasitic virus. It hooks INT 9, 21h and writes itself to the end of COM and EXE files that are executed or opened. The virus deletes the anti-virus data files CHKLIST.MS and SMARTCHK.CPS, if they exist. On May 20th the virus inserts the following text into the keyboard buffer (i.e. simulates user input):
"Just a joke,Don't mind!"---Rch
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NetBios.4340
Description NetBios.4340
It is a dangerous memory resident parasitic virus. It hooks INT 21h and writes itself to the end of COM and EXE files that are accessed. When an infected file is executed, the virus disinfects it. The virus overwrites some EXE files with a trojan program that erases CMOS, disk sectors and manifests itself with some video effect. This virus contains the text string:
Retix PC-21 NETBIOS
Neumann.752
Description Neumann.752
It is a very dangerous memory resident parasitic virus. It hooks INT 21h and when any program is executed, the virus searches for COM-files (except COMMAND.COM) and writes itself to the end of the file. On May, 5th the virus erases the disk sectors. The virus contains the text strings:
[ NEUMANN J. (1903-57) V2.7 HUNGARY ]
*.COM
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