Vbasic Family
Description Vbasic Family
These are nonmemory resident dangerous viruses. They search for COM and EXE files and write themselves to the end of the file. Sometimes they erase the CMOS and the MBR of the hard drive. The viruses reportedly disinfect Pakistani Brain virus.
These viruses contain the text string:
KEYB*.COM KEYB*.EXE BASRUN BRUN COBRUN NET$OS *.COM IBMBIO.COM IBMDOS.COM
COMMAND.COM *.* .. .. *.EXE Access denied. *.EXE
Some versions of "Vbasic" sometimes display the message "ACCESS Denied" and return to DOS.
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Signed Family
Description Signed Family
These are dangerous nonmemory resident parasitic encrypted viruses. They search for .EXE files and write themselves to the end of the file. Sometimes they erase the disk sectors and display:
There Can Be Only Oneall.. Signed -Traveling _ack-
Signs.720
Description Signs.720
This is a harmless memory resident parasitic virus. It hooks INT 8 and 21h, and writes itself to the end of COM files that are executed. On Fridays, it cyclically shifts a screen from top to bottom. It contains the text:
Signs Of Life
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