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# $Id: 1856.txt,v 1.2 2002/08/08 13:41:19 cazz Exp $
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#

Rule:
alert icmp $EXTERNAL_NET any <> $HOME_NET any (msg:"DDOS Stacheldraht
handler->agent (ficken)"; content: "|66 69 63 6B 65 6E|"; itype: 0; icmp_id:
6667; reference:arachnids,191; classtype:attempted-dos; sid:XXX; rev:1;)
--
Sid:
--
Summary:
Varient of Stacheldraht DDOS tool
--
Impact:
Likely you have a compromised machine and your machine is being used as a
ddos zombie
--
Detailed Information:
This signature is based on traffic caught in the wild. Stracheldraht is a
Distributed denial of service tool normally found on Sun Solaris machines.
It is made up of a Client, handler and agent. The clients connects to the
handler. Handlers can connect with up to 1000 agents. Communication between
the client and the handler is conducted using tcp and the communication
between the handler and the agent can be either tcp or icmp_echoreply. This
signature detects the a message sent from the handler to the agent. This
message is used to respond to a agent message "skillz". The handler will
reply with the string "ficken". This traffic differs from the traffic
described on http://staff.washington.edu/dittrich/misc/stacheldraht.analysis
because the packets have an icmp id of 6667 rather than 667 as noted in the
analysis.

--
Attack Scenarios:
The agent can be used to mount a distributed denial of service attack. It
also means that a machine is compromised.
--
Ease of Attack:

--
False Positives: Should not be any.
--
False Negatives: The icmp id along with the keywords may be changed in the
source code to hide this traffic from beng detected
--
Corrective Action:
Take the machine off line asap and rebuild with a completely new install.
--
Contributors:
Ian Macdonald
--
Additional References:
http://staff.washington.edu/dittrich/misc/stacheldraht.analysis
arachnids,191
http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?id=advise43
