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RE: Zombie / Botnet?
From: "Barry Raveendran Greene" <bgreene () senki org>
Date: Tue, 10 Nov 2009 09:25:47 -0800

The dirty secret that the people are not letting you know is that anti-virus
obsolete. The people who build and deploy malware know how to obfuscate the
code so that anti-virus does not pick it up. The really lame "bad guys" will
obfuscate once a week - requiring the anti-virus team to deploy a new sig
once a week. The really good bad guys will obfuscate ever 15 minutes - using
the same malware package as the "lame" bad guys. 

Note, might be malware command and control. See if there is any DNS. If you
see really weird queries (like teraazxi.(somedomain).(some TLD)) then it is
a BOT talking to a controller.

For remediation - I have my own list I build that is based on this work:

http://home.comcast.net/~SupportCD/MalwareRemoval.html

You sometimes have to tune it to the specific malware (using different clean
up tools).


-----Original Message-----
From: listbounce () securityfocus com
[mailto:listbounce () securityfocus com] On Behalf Of Tony Raboza
Sent: Tuesday, November 10, 2009 4:05 AM
To: security-basics () securityfocus com
Subject: Zombie / Botnet?

Hi,

One of our workstations is broadcasting a huge amount of UDP traffic
(around 5Mbps) and I'm thinking it could be a zombied computer doing
DDOS as directed by its controller.  But the weird thing is - it has
an updated McAfee AV with HIPS ??  Why was this not detected - or
could I be reading this wrong?  Here's a portion of the tcpdump:

14:00:20.509030 IP 192.168.10.10.smpppd > i.root-servers.net.hpstgmgr:
UDP, length 1000
14:00:20.519512 IP 192.168.10.10.iiw-port > 77.91.227.67.4744: UDP,
length 1000
14:00:20.520580 IP 192.168.10.10.odi-port > a.root-servers.net.4496:
UDP, length 1000
14:00:20.521733 IP 192.168.10.10.brcm-comm-port >
b.root-servers.net.4710: UDP, length 1000
14:00:20.523076 IP 192.168.10.10.pcle-infex > c.root-servers.net.826:
UDP, length 1000
14:00:20.524186 IP 192.168.10.10.csvr-proxy > d.root-servers.net.3997:
UDP, length 1000
14:00:20.525251 IP 192.168.10.10.csvr-sslproxy >
E.ROOT-SERVERS.NET.funk-license: UDP, length 1000
14:00:20.526385 IP 192.168.10.10.firemonrcc >
f.root-servers.net.sonuscallsig: UDP, length 1000
14:00:20.527798 IP 192.168.10.10.spandataport >
G.ROOT-SERVERS.NET.4130: UDP, length 1000
14:00:20.528794 IP 192.168.10.10.magbind > h.root-servers.net.atmtcp:
UDP, length 1000
14:00:20.529947 IP 192.168.10.10.ncu-1 >
i.root-servers.net.direcpc-dll: UDP, length 1000
14:00:20.537027 IP 192.168.10.10.ncu-2 > 77.91.227.67.audit-transfer:
UDP, length 1000
14:00:20.538422 IP 192.168.10.10.embrace-dp-s >
77.91.227.67.bluelance: UDP, length 1000
14:00:20.538712 IP 192.168.10.10.embrace-dp-c >
a.root-servers.net.embrace-dp-s: UDP, length 1000
14:00:20.540010 IP 192.168.10.10.dmod-workspace >
b.root-servers.net.bvcontrol: UDP, length 1000
14:00:20.540208 IP 192.168.10.10.tick-port > a.root-servers.net.925:
UDP, length 1000
14:00:20.541412 IP 192.168.10.10.cpq-tasksmart >
b.root-servers.net.bnt-manager: UDP, length 1000
14:00:20.541756 IP 192.168.10.10.intraintra > c.root-servers.net.864:
UDP, length 1000
14:00:20.542941 IP 192.168.10.10.netwatcher-mon >
c.root-servers.net.sbi-agent: UDP, length 1000
14:00:20.544113 IP 192.168.10.10.netwatcher-db >
d.root-servers.net.4467: UDP, length 1000
14:00:20.544400 IP 192.168.10.10.isns > d.root-servers.net.4245: UDP,
length 1000
14:00:20.545444 IP 192.168.10.10.ironmail > E.ROOT-SERVERS.NET.2374:
UDP, length 1000


==

Its sending UDP traffic to the root nameservers ....

Any ideas?
Thanks.


Best,
Tony

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------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------


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