Snort mailing list archives

Re: Please, point to the source where i can read about some signatures


From: twig les <twigles () yahoo com>
Date: Fri, 6 Sep 2002 09:12:21 -0700 (PDT)

Actually I got some false positives on that sig
yesterday.  I just did a google search on the message
and the 3rd or 4th link got me to arachnids.


--- "Anton A. Chuvakin" <anton () chuvakin org> wrote:
Sergei and all,

What does this message mean:
DDoS tool shaft client (i.e. a controll program) is
probably talking to
one of the control modules of shaft
denial-of-service network. The
handlers than can send commands to DoS bots to
initiate an attack.

[**] DDOS shaft client to handler [**]
09/05-17:16:14.598799 213.152.133.10:80 ->
217.196.100.63:20432
I suspect it is a FALSE POSITIVE. Check the
signature in your
/etc/snort.conf and confirm that they only track
shaft by port number and
not by packet content. Then the sig will trigger on
RESPONSE to a web
request done from high-numbered port to port 80.

TCP TTL:64 TOS:0x0 ID:18426 IpLen:20 DgmLen:48 DF
***A**S* Seq: 0x82327B22  Ack: 0xBC9B5FF7  Win:
0x60F4  TcpLen: 28
TCP Options (4) => NOP NOP SackOK MSS: 1460

Where can i read something about these signatures.
Thanks a lot.
Hmm, if not on snort.org/snortdb, than nowhere.

Best,
-- 
  Anton A. Chuvakin, Ph.D., GCIA
     http://www.chuvakin.org
   http://www.info-secure.org





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