Ice IX banking Trojan steals info that enables fraudsters to hijack phone calls

Trusteer discovered Ice IX configurations that extract telephone account numbers from victims

New variants of the Ice IX online banking Trojan program are tricking victims into exposing their telephone account numbers so that fraudsters can divert post-transaction verification phone calls made by banks to phone numbers under their control, researchers from security vendor Trusteer warned.

Ice IX is a modified version of ZeuS, one of the most successful and sophisticated online banking Trojans to date. Like its parent, Ice IX has the ability to manipulate the content displayed in browsers used by its victims and inject rogue Web forms into online banking websites.

The rogue forms are usually used to extract online banking credentials along with other security information like secret questions/answer pairs and date of birth. However, new Ice IX configurations analyzed by Trusteer researchers also display forms that ask victims for their telephone account numbers, a piece of information used by telephone companies to verify the identity of their subscribers.

"The victim is asked to update their phone numbers on record (home, mobile and work) and select the name of their service provider from a drop-down list," Trusteer's CTO Amit Klein said in a blog post. "In this particular attack, the three most popular phone service providers in the UK are presented: British Telecommunications, TalkTalk and Sky."

The Trojan then asks victims to input their telephone account number under the pretext of a malfunction of the bank's anti-fraud system with its landline phone service provider. U.S. online banking customers are also targeted, Klein said.

Trusteer suspects that this information is used by fraudsters to access the telecom operator's self-service center and enable call forwarding for the victims' phone numbers without their knowledge. However, the security company doesn't have access to any data proving that such an attack has occurred, Klein said in an email.

The existence of dedicated caller services contracted by cybercriminals to impersonate bank customers and confirm fraudulent transactions can serve as indication that fraudsters need to have post-transaction verification phone calls forwarded to numbers of their choosing.

"Fraudsters are increasingly turning to these post-transaction attack methods to hide fraudulent activity from the victim and block email and phone communication from the bank," Klein said. "This allows attackers to circumvent security mechanisms that look for anomalies once transactions have already been executed by the user."

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Lucian Constantin

IDG News Service
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Kurt Hegetschweiler

Brother PocketJet PJ-773 A4 Portable Thermal Printer

It’s perfect for mobile workers. Just take it out — it’s small enough to sit anywhere — turn it on, load a sheet of paper, and start printing.

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?