Risk
8/29/2013
06:45 AM
Tim Wilson
Tim Wilson
Quick Hits
Connect Directly
RSS
E-Mail
50%
50%

Four Tips For Spotting The Kelihos Botnet Infection

Kelihos keeps coming back -- but it's not tough to detect, Zscaler researcher says

Despite concerted attempts to bring it down, the Kelihos botnet is alive and well and infecting devices all over the Web, according to a new report. The good news is that it's not too hard to spot.

In a blog posted Tuesday, Zscaler researcher Chris Mannon offers an analysis of the latest iterations of Kelihos, and four tip-offs that indicate its infection.

"Firstly, the use of P2P [peer to peer] style communication via SMTP [Simple Message Transfer Protocol] raised an eyebrow," Mannon says. "Secondly, we observed the overt way the botnet installs several packet capturing utilities and services. This is done so that the infection can monitor ports 21, 25, and 110 for username and password information."

Third, the botnet attempts to categorize its new victim by using legitimate services to gather intelligence, Mannon says. In one instance, "the malicious file actually queried the victim's IP address on Barracuda Networks, SpamHaus, Mail-Abuse, and Sophos," the blog says. "These services primarily exist to notify users of abuse seen on the site or IP address. Kelihos is using it to to determine if the new victim is already seen as malicious or not.

"A final point to make about this threat is that it makes no attempt to hide exactly how loud it is regarding network activity," Mannon says. "We noted a spike in TCP traffic across a distinct 563 IP addresses in the span of two minutes. Network administrators should take extra care in monitoring users with anomalous levels of traffic. A single node giving off so much traffic to different services in such a small window" could indicate that an end user is infected.

Have a comment on this story? Please click "Add a Comment" below. If you'd like to contact Dark Reading's editors directly, send us a message. Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Must Reads - September 25, 2014
Dark Reading's new Must Reads is a compendium of our best recent coverage of identity and access management. Learn about access control in the age of HTML5, how to improve authentication, why Active Directory is dead, and more.
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2003-1598
Published: 2014-10-01
SQL injection vulnerability in log.header.php in WordPress 0.7 and earlier allows remote attackers to execute arbitrary SQL commands via the posts variable.

CVE-2011-4624
Published: 2014-10-01
Cross-site scripting (XSS) vulnerability in facebook.php in the GRAND FlAGallery plugin (flash-album-gallery) before 1.57 for WordPress allows remote attackers to inject arbitrary web script or HTML via the i parameter.

CVE-2012-0811
Published: 2014-10-01
Multiple SQL injection vulnerabilities in Postfix Admin (aka postfixadmin) before 2.3.5 allow remote authenticated users to execute arbitrary SQL commands via (1) the pw parameter to the pacrypt function, when mysql_encrypt is configured, or (2) unspecified vectors that are used in backup files gene...

CVE-2012-5485
Published: 2014-09-30
registerConfiglet.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to execute Python code via unspecified vectors, related to the admin interface.

CVE-2012-5486
Published: 2014-09-30
ZPublisher.HTTPRequest._scrubHeader in Zope 2 before 2.13.19, as used in Plone before 4.3 beta 1, allows remote attackers to inject arbitrary HTTP headers via a linefeed (LF) character.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Chris Hadnagy, who hosts the annual Social Engineering Capture the Flag Contest at DEF CON, will discuss the latest trends attackers are using.