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Date:      Fri, 29 Oct 1999 12:40:20 +0200
From:      Beck David <dbeck@freesoft.hu>
To:        "'freebsd-security@FreeBSD.ORG'" <freebsd-security@FreeBSD.ORG>
Subject:   Strange things on my computer / Help
Message-ID:  <1BD5A68BE9E8D211BBE8006094B9EB73E97C@netfinity.freesoft.hu>

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This is the first time I write to the list, Big Hello To All,


I administer a host on the Internet which basically doesn't really
do anything. I installed some services like www,ftp,ssh,qmail
/ no big deal.

I started playing with this machine 10 month ago. Since that I found
a handful of strange thingies:

- my wtmp files turn on each month, but after a short while allways
 gets corrupted
- if I run who, it doesn't show any user
- if I run last, it shows a big pile of garbage
- I filter out ICMP totally, which is OK for me
- but the kernel complains in every 10 minutes for some _out_ going
  ICMP packets, which goes to two hosts. I am absolutely sure
  that nor me nor any of my programs has nothing to do with that hosts
- when I found this I started to look for the program which generates
  the ICMP packets but I didn't find anything
- I checked the cron rules, but I didn't find anything
- then I turned off the setuid bits from nearly every program on my
  host including ping and traceroute, but didn't help

Do you guys suspect that my machine got exploited ? /I do, but I can't
prove it./

Any ideas ?

Thx, David.



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