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 Good Gear Guide newsletter!

Error: Please check your email address.

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

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

Essentials

Lexar® JumpDrive® S57 USB 3.0 flash drive

Learn more >

Microsoft L5V-00027 Sculpt Ergonomic Keyboard Desktop

Learn more >

Mobile

Lexar® JumpDrive® S45 USB 3.0 flash drive 

Learn more >

Exec

HD Pan/Tilt Wi-Fi Camera with Night Vision NC450

Learn more >

Lexar® Professional 1800x microSDHC™/microSDXC™ UHS-II cards 

Learn more >

Lexar® JumpDrive® C20c USB Type-C flash drive 

Learn more >

Audio-Technica ATH-ANC70 Noise Cancelling Headphones

Learn more >

Budget

Back To Business Guide

Click for more ›

Most Popular Reviews

Latest News Articles

Resources

PCW Evaluation Team

Michael Hargreaves

Windows 10 for Business / Dell XPS

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?