[comp.virus] Stoned, disk size and drive preference

USERQBPP@SFU.BITNET (Robert Slade) (01/28/91)

The following exchange ported from the SUZY Information System:

== E-Mail > Fetch > Sinclair, Wayne ===========================================
=

  Subject: Stoned signature

  I have had problems with the Stoned virus in the past, at least I
  hope its past, but one thing puzzels me!

  I cleaned the whole of my system including all of my 3.5 and 5.25
  floppies (100's of them) and fould many of my 5.25s to be
  infected by not one 3.5 disk out of a 100 or so. I did get
  reports back from F-Prot that there may be something
  unidentafiable on the boot sector and I attributed that to the
  strange formating that PC Tools 6.0 puts on the disk.

  Are some versions of the Stoned virus not capably of infecting
  drive B: or was I just outright lucky?

  Since I done the compleat system clean up a few month ago I have
  had no problems. I run F-Prots sys file to keep gaurd all the
  time, it saved me in the past 4 or 5 times.

  Also what triggers the Stoned virus into action, a key
  combination, timers, certain number of boots I can't figure it
  out? In all the times that the little pest gave me problems I had
  been previously working in PC Tools. I let Central Point know
  about this and their responce was "Oh". Strange.

  Wayne Sinclair

== E-Mail > Fetch > Sinclair, Wayne > Reply ===================================
=

  Subject: Stoned and drives

  There are at *least* six versions of "Stoned" on the loose,
  probably a good many more.  So one cannot be too certain about
  "absolute" behaviour of the virus, but ...

  There are actually two possible explanations of the behaviour you
  see.  I have a report of a version of "Stoned" (reported to be
  the original, in fact) that will not infect 3.5" drives.  (This
  may have been "inspired" by the original BRAIN virus, which
  checked for the signature of a low density, 5.25" disk, and would
  not infect otherwise.)  I have, in my possesion, a version which
  happily infects any size of floppy, but will not infect the B:
  drive.

  Activation is problematic as well.  One of the versions I have
  will happily infect any disk in the A: drive, whenever the A:
  drive is accessed.  Even for a DIR.  The other version is a
  sullen beast, and I haven't yet figured out it's exact
  activation, but PCTOOLS seems to trigger it in my case as you
  report with yours.

  And yes, FPROT (at least up to version 1.13) did report PCTOOLS
  formatting as suspect.  I have sent frisk a copy of the PCTOOLS
  boot sector, but I don't know whether he has been able to
  incorporate it into 1.14.  Which is, by the way, available now in
  the INtegrity Library.