badsectors.315
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BadSectors.3150
These are dangerous memory resident parasitic viruses. They hook INT 8, 16h, 21h, 25h, 26h. On DOS calls FindFirst/FindNext FCB/ASCII they search for COM and EXE files and write themselves to the end of the file. They also infect the files that are opened, executed or renamed. The viruses do not infect the SCAN.* files. Sometimes they mark the disk clusters as bad ones by manipulation with FAT sectors. By hooking INT 16h these viruses joke with keyboard. These viruses contain the internal text strings:
COMEXE
SCAN
and:
"BadSectors.3150": BadSectors 1.0
"BadSectors.3422": BadSectors 1.1
"BadSectors.3428": BadSectors 1.2
"BadSectors.3627:: BadSectors 1.3
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