Endpoint
9/16/2009
01:59 PM
Connect Directly
Google+
Twitter
RSS
E-Mail
50%
50%

Antivirus Rarely Catches Zbot Zeus Trojan

New research reveals the No. 1 financial Trojan is difficult to detect

The most pervasive banking Trojan evades detection by antivirus software most of the time, according to new research.

Zeus, the Trojan that steals financial credentials and data and is spread via the Zbot botnet, is detected only 23 percent of the time by up-to-date antivirus applications, researchers at Trusteer discovered. Trusteer sampled 10,000 machines that were infected by Zbot, and of these Zeus-infected machines, 55 percent were running-up-to date AV software.

The massive Zbot botnet -- made up of 3.6 million PCs in the U.S., or 1 percent of all PCs in the country, according to Damballa data -- spreads Zeus, which is the No. 1 financial Trojan, representing 44 percent of all financial malware infections today, according to Trusteer. The malware steals users' online financial credentials and moves them to a remote server, where it can inject HTML onto pages rendered by the victim's browser to display its own content mimicking, for instance, a bank's Web page.

"Zeus' infection rate is higher than that of any other financial Trojan. We are seeing actual fraud linked to Zeus -- accounts being compromised, [and] money transferred from accounts of customers infected with Zeus," says Mickey Boodaei, founder and CEO of Trusteer, which sells online banking security tools. "When we investigate some of our banking customers' [machines infected by it], we find evidence of abuse on the computer, so we know this crime ring is very active and dangerous."

It's unclear exactly why Zeus is so wily, but Boodaei says there are multiple variants of the malware, which could make it more difficult to pinpoint.

"One thing we didn't do is check the same thing for other Trojans. It could be that the infection rates are like this for all Trojans," Boodaei says. "But we know Zeus is very effective at hiding in the operating system, and it's hard to remove it."

Of the Zeus-infected bots, 31 percent weren't running any AV program, while 14 percent were running AV that wasn't up-to-date. The rest were running up-to-date AV.

Trusteer estimates that among all Windows users, 71 percent run up-to-date AV, 6 percent run AV that's out of date, and about 23 percent don't run AV at all.

Have a comment on this story? Please click "Discuss" below. If you'd like to contact Dark Reading's editors directly, send us a message. Kelly Jackson Higgins is Executive Editor at DarkReading.com. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2015-4231
Published: 2015-07-03
The Python interpreter in Cisco NX-OS 6.2(8a) on Nexus 7000 devices allows local users to bypass intended access restrictions and delete an arbitrary VDC's files by leveraging administrative privileges in one VDC, aka Bug ID CSCur08416.

CVE-2015-4232
Published: 2015-07-03
Cisco NX-OS 6.2(10) on Nexus and MDS 9000 devices allows local users to execute arbitrary OS commands by entering crafted tar parameters in the CLI, aka Bug ID CSCus44856.

CVE-2015-4234
Published: 2015-07-03
Cisco NX-OS 6.0(2) and 6.2(2) on Nexus devices has an improper OS configuration, which allows local users to obtain root access via unspecified input to the Python interpreter, aka Bug IDs CSCun02887, CSCur00115, and CSCur00127.

CVE-2015-4237
Published: 2015-07-03
The CLI parser in Cisco NX-OS 4.1(2)E1(1), 6.2(11b), 6.2(12), 7.2(0)ZZ(99.1), 7.2(0)ZZ(99.3), and 9.1(1)SV1(3.1.8) on Nexus devices allows local users to execute arbitrary OS commands via crafted characters in a filename, aka Bug IDs CSCuv08491, CSCuv08443, CSCuv08480, CSCuv08448, CSCuu99291, CSCuv0...

CVE-2015-4239
Published: 2015-07-03
Cisco Adaptive Security Appliance (ASA) Software 9.3(2.243) and 100.13(0.21) allows remote attackers to cause a denial of service (device reload) by sending crafted OSPFv2 packets on the local network, aka Bug ID CSCus84220.

Dark Reading Radio
Archived Dark Reading Radio
Marc Spitler, co-author of the Verizon DBIR will share some of the lesser-known but most intriguing tidbits from the massive report