[comp.virus] Harddisk virus

K85_BIORN@tekno.chalmers.se (Bj|rn Sandell) (11/27/90)

Dear Sirs,

My harddisk (A590) has behaved strange lately.  It started when some
files (e.g. runback) ceased to be objectfiles.  When I examined them,
they contained mostly FF (HEX).  I guess one could say that they were
empty, but they were still of original size.  I deleted the files, and
replaced them with backuped stuff, and thought not much more of it.
After a while I found more files with these symptoms. Since I didn't
worry to much first time this happened, I couldn't tell if it was the
same files as the first time or new one.  At this time I noticed that
'info' claimed that 49% of DH0 was used, but I knew that it should be
more than 80% full.  A recursive listing confirmed this.  When I
booted up the machine the next the, a system request popped up.  It
said something like "Key 23046 already defined".  The harddisk
wouldn't verify, I found several readerrors, and eventually I gave up
and reformated it.

Could this be the result of a virus or trojan, or am I to blame?  Is
there any Amiga-virus that infect the harddisk?  If so, what symptoms
does it cause, and how do I get rid of it?

Yours sincerely

   Bjorn Sandell