GozNym Trojan turns its sight on business accounts at major US banks

The malware redirects victims to perfect replicas of online banking websites

A hybrid Trojan program created for financial fraud has started redirecting users of four large U.S. banks to rogue websites in order to hijack their accounts.

GozNym is a relatively new threat, first discovered in April, and is based on the Nymaim malware dropper and the Gozi banking Trojan. Like most banking Trojans, GozNym can inject rogue code into banking websites displayed in local browsers in order to steal credentials and other sensitive information.

However, in addition to this old technique, the cybercrime gang behind it has also built the necessary infrastructure to host rogue copies of banking websites, and they've started to redirect victims there.

GozNym used this redirection method two months ago against users of several banking websites from Poland. However, according to researchers from IBM's X-Force team, its authors have recently launched similar attacks against the online business banking services of four large U.S. banks.

First, the Trojan redirects the victim to the fake version of the site hosted on the attackers' infrastructure, and it then temporarily displays a white overlay over the page. This unusual masking trick might be intended to distract the users and to make them believe that the page is harmless.

The fake sites are perfect replicas of the real ones. The malware uses some technical tricks locally to keep the bank's real URL in the address bar and even the SSL certificate.

Once users input their credentials into the fake website, the credentials are tested in real-time against the bank's genuine website. If they work, the attackers initiate fraudulent money transfers out of the victim's account.

"Moreover, the victim is kept on the fake website, where the attacker can push social engineering notifications to them, making them divulge personally identifiable information and two-factor authentication elements," the IBM X-Force researchers said in a blog post.

Despite being new, GozNym is quickly gaining ground in the cybercrime arena, currently ranking fifth for banking Trojan activity in 2016. The IBM researchers expect that after this testing period, its creators will add more U.S. banking websites to the rogue redirection list. The researchers didn't name the original banks targeted.

In addition to the usual security recommendations of keeping software up to date, running an antivirus program, and being wary of email attachments, employees in charge of finances inside companies should try to use dedicated computers to access bank accounts and operate financial transactions. These computers shouldn't be used for other tasks like general browsing and email.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
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

Brand Post

Bitdefender 2019

Taking cybersecurity to the highest level and order now for a special discount on the world’s most awarded and trusted cybersecurity. Be aware without a care!

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?