Scitzo Family
Description Scitzo Family
These are dangerous memory resident parasitic polymorphic viruses. They hook INT 21h and write themselves to the end of COM and EXE files that are executed ot opened. While installing memory resident the viruses infect the C:DOSEDIT.COM file. While infecting a file they compare the file name with the string of the names of anti-virus utilities (three letters per name) and do not infect the files with the names from that string:
TBATBSF-PVSHMSATBCCPAVSAVIRSCACLETOO
Depending on the system timer the viruses append the text string to the files that are opened:
I feel a little scitzoall
The viruses also contain the strings:
C:DOSEDIT.COM
SCITZO - by "RED A", Lund, Sweden 1994
Different versions contain the strings:
"Scitzo.1285,1337": So, you've found this text?
"Scitzo.1264,1329": Fan, här går man...
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Ap.272
Description Ap.272
It's a harmless memory resident parasitic virus. It hooks INT 21h and writes itself at the end of COM-files are executed. It contains the internal ID-strings: "AP".
AP.a
Description AP.a
This is harmless stealth boot virus. It hooks INT 13h and hits boot sectors of floppy disks and MBR of hard drive the same way as Stoned viruses do. AP viruses contains ID-word "AP".
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