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Inside Botnets




Inside Botnets
Inside Botnets



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1. In Focus: Inside Botnets

2. Security News and Features
   - Recent Security Vulnerabilities
   - Check Point and Sourcefire Cancel Merger
   - MetaFisher Still Stealing Sensitive Data

3. Security Toolkit
   - Security Matters Blog
   - FAQ
   - Security Forum Featured Thread
   - Share Your Security Tips

4. New and Improved
   - Security Test Web Apps as You Write Them

===================
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==== 1. In Focus: Inside Botnets ===   by Mark Joseph Edwards, News Editor, mark at ntsecurity / net

In the news recently was an interesting story about MetaFisher (also 
known as Spy-Agent), a Trojan horse program that steals personal 
financial information. What was particularly interesting about the news 
report that I received from iDefense was screenshots of the control 
interface used by the MetaFisher bot network (botnet) operators. The 
images give a good idea of what goes on behind the scenes of botnets. 
If you've already looked at the news story that I posted on our Web 
site and didn't see the images, be sure to check it again--I added the 
images on Monday. You can link to the story from the MetaFisher news 
story below.

Botnets are a huge problem. Understanding how bots work helps us 
understand how to defend against them and how to shut down botnets. 
Every antivirus vendor and many other types of security vendors hold a 
wealth of information about untold numbers of bots. However, when these 
companies publish alerts and advisories about bots, the reports rarely 
contain greatly detailed information that describes the inner workings 
and capabilities of the bots. So learning how a bot behaves is 
typically rough work. Even if you manage to capture a bot, you're left 
to reverse-engineer it on your own. 

Paul Barford and Vinod Yegneswaran of the University of Wisconsin 
Computer Sciences Department wrote an excellent white paper, "An Inside 
Look at Botnets." The pair give detailed insight into four types of 
bots, including those based on Agobot, SDBot, GT Bot, and Spybot. 

If you read the white paper, you'll learn that although most bots today 
operate in conjunction with Internet Relay Chat (IRC) servers (which 
makes shutting down botnets somewhat less difficult), some bots are 
beginning to gain peer-to-peer functionality. This evolution of course 
means that shutting down botnets will become more difficult in many 
cases in the future. 

What I found particularly interesting about the white paper is that 
Barford and Yegneswaran reveal the complete command sets of the bot 
variants they examined. The commands include those used by bots during 
interaction with IRC servers and those used by bots for interactivity 
with the local host on which the bot is installed. For example, some 
bots can scan the registry to obtain CD-ROM keys, AOL account 
information, PayPal account information, and so on. Some bots can also 
lock down a host to some extent by disabling services selectively as 
well as starting the bot operator's services of choice. These commands 
give botnet operators a huge amount of control over infected systems. 

Other commands let the botnet operators perform exploits and attacks. 
For example, Agobot (which is among the most sophisticated of bots 
today) can scan for systems with vulnerabilities in DCOM, DameWare 
Development software, and Famtech International's RADMIN; scan for back 
doors left open by Bagle and MyDoom; and brute-force-crack NetBIOS and 
Microsoft SQL Server passwords. Agobot can also launch seven types of 
Distributed Denial of Service (DDoS) attacks. Adding to the danger 
level, Agobot is polymorphic to some extent, with four ways of 
obscuring its network communications. 

This is just a brief summary of some of the information you'll learn by 
reading "An Inside Look at Botnets." The paper (available in PDF format 
at the URL below) is a real eye-opener, particularly if you don't have 
much knowledge of how bots operate. The information can help you think 
of ways to detect some of the related activity on your networks. It's 
definitely worth the read.
http://list.windowsitpro.com/t?ctl=2548A:4FB69 

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==== Sponsor: Liquid Machines ===
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===================
==== 2. Security News and Features ===
Recent Security Vulnerabilities
   If you subscribe to this newsletter, you also receive Security 
Alerts, which inform you about recently discovered security 
vulnerabilities. You can also find information about these 
discoveries at
http://list.windowsitpro.com/t?ctl=2547F:4FB69 

Check Point and Sourcefire Cancel Merger
   We previously reported that Israeli-based Check Point Software and 
U.S.-based Sourcefire planned to merge pending review by the Committee 
on Foreign Investment in the United States. The merger has now been 
cancelled, with no official reason given.
http://list.windowsitpro.com/t?ctl=25486:4FB69 

MetaFisher Still Stealing Sensitive Data
   MetaFisher--a Trojan horse discovered over a month ago--is still 
wreaking havoc against unsuspecting users. Ken Dunham of iDefense 
provided screenshots (seen below) of the attacker's management 
interface for the bot network (botnet). Take a look! 
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===================
==== Resources and Events ===
Learn to secure your IM traffic--don't let your critical business 
information be intercepted!
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Gain control of your messaging data with step-by-step instructions for 
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===================
==== Featured White Paper ===
Learn to identify the top 5 IM security risks and protect your networks 
and users.
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===================
==== Hot Spot ===
LeftHand Networks
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===================
==== 3. Security Toolkit ==== 

Security Matters Blog: Think IPsec
by Mark Joseph Edwards, http://list.windowsitpro.com/t?ctl=2548B:4FB69 

IPsec could help you improve security for your domains and servers. 
This blog article links you to resources that show you how.
http://list.windowsitpro.com/t?ctl=25488:4FB69 

FAQ
by John Savill, http://list.windowsitpro.com/t?ctl=25489:4FB69 

Q: How can I use a script to list all subnets in a site?

Find the answer at http://list.windowsitpro.com/t?ctl=25485:4FB69 

Security Forum Featured Thread: 
   Marcus has been trying to configure a Juniper Networks NetScreen 5GT 
firewall to pass PPTP traffic to a VPN on Windows Small Business Server 
(SBS) 2003. He can connect and is prompted for a username and password, 
but then the connection just hangs. The event log shows an error (event 
ID 20209) indicating that Generic Routing Encapsulation (GRE) packets 
were unable to pass through the firewall. Marcus says he found a way to 
create a custom service for GRE passthrough, but this still didn't 
resolve the issue. Any ideas? Join the discussion at 
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===================
==== 4. New and Improved === by Renee Munshi, products@windowsitpro.com 

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