RSA Upgrades Malware Defenses For Bank Transactions

Latest adaptive authentication technology adds new Trojan and man-in-the-middle defenses, plus risk assessment for ATM machine transactions.

RSA, a division of EMC, Tuesday announced the release of the latest version of its adaptive authentication technology, which is used by banks to help spot and block unauthorized transactions or account takeovers.

The new version of adaptive authentication is already available for users of the on-premises version, while the new cloud-based version is due out Jan. 20. According to Amy Blackshaw, senior product marketing manager for RSA's identity verification and protection products, RSA counts about 70 out of top 100 U.S. banks as adaptive authentication customers.

The goal of most financial malware is to take over a target's bank account, allowing the attackers to transfer the money it holds into an account they control. "Account takeover is currently the single most important issue for our customers," said Manoj Nair, general manager for RSA's identity and data protection group, in a statement.

[ Read Fast Flux Botnet Nets Fraudsters $78 Million. ]

That's because the quantity of account-takeover attacks -- meaning an attacker has cloned an ATM card or stolen related details, perhaps including account access codes and PINs -- continues to increase. According to a survey of 100 financial service institutions released by the Financial Services Information Sharing and Analysis Center (FSISAC) earlier this year, and conducted by the American Bankers Association, account takeover more than tripled between 2009 and 2011. Respondents said they've helped address account-takeover fraud by pursuing customer education (for 92% of respondents), changing their multi-factor authentication system (67%), freezing a customer's account whenever anomalous activity is detected (59%), and modifying an existing multifactor authentication system to make it work better (50%).

To help businesses better spot account takeover attempts, the RSA adaptive authentication revamp includes better Trojan-detection features -- for example, to detect proxy attacks in which an attacker logs onto a bank site from a proxy IP address, rather than a verified IP address for the customer. The updated software also has new techniques for detecting HTML injection attacks, which attempt to make surreptitious transactions when a user is logged onto a banking site, as well as attempt to harvest additional user credentials, such as social security numbers and website PIN codes.

The updated software also includes "man versus machine" technology to guard against attack scripts that can be used to automatically add payees to accounts and automatically disperse money to outside, attacker-owned accounts. The software detects this in part by literally assessing whether mouse movements and keystrokes are being used to enter data, or whether the information is being entered by a script.

Finally, the software also can watch for man-in-the-middle attacks, which involve eavesdropping or substituting communications; as well as man-in-the-browser exploits, in which a Trojan application is used to infect a browser and intercept application calls between the browser and its security mechanisms or libraries.

One of the new adaptive authentication features involves risk assessment for ATMs themselves, in part to help spot and block money mule operations. These involve teams of criminals who apply stolen account credentials to faked ATM or credit cards, and then attempt to withdraw lots of money at once, sometimes covering multiple states in a single day.

"Something we've heard loud and clear, specifically from a lot of developing countries, is that fraud has migrated into the ATM channel," said Blackshaw, speaking by phone.

RSA's product can watch for geographical anomalies -- for example, a user is attempting to withdraw money from an ATM in a location never before visited -- as well as odd withdrawal amounts and frequency, or unusual date and time access patterns. "The way we're getting that data is through the batch files of the ATM, so we'd be doing a risk analysis on the card, the account, and the user behavior," she said. This type of analysis is designed in part to stop attempts by a criminal gang that attempts to withdraw money from many different locations in a short period of time. "In many cases, fraudsters use mules to transfer the money into a mule's account, and then in many cases the mules will go to an ATM to withdraw those funds," Blackshaw said.

For now, the ATM security tools only offer monitoring. "There's no inline blocking mechanism at this point," said Blackshaw -- unlike when adaptive authentication is used to assess website, portal, or mobile transactions.

On the mobile front, finally, Blackshaw said financial services firms can use an adaptive authentication API to send transaction information from the mobile app to an adaptive authentication server, which analyzes the proposed transaction using RSA's risk analysis tools, and then can either approve the transaction, request additional authentication from the user, or block the transaction entirely.

Looking for anomalous types of transactions also now can be done via mobile applications, and using Wi-Fi hotspot, cell tower, as well as GPS data to identify the rough geographic location of a user. Interestingly, RSA said it can also watch for whether multiple transactions involving the same account are being made from geographic locations that a user wouldn't have been able to traverse in the intervening time.

Faster networks are coming, but security and monitoring systems aren't necessarily keeping up. Also in the new, all-digital Data Security At Full Speed special issue of InformationWeek: A look at what lawmakers around the world are doing to add to companies' security worries. (Free registration required.)

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