Backoff May Accelerate EMV Switch

Backoff malware that has attacked point of sale systems at hundreds of businesses may accelerate adoption of EMV chip and PIN cards and two-factor authentication as merchants look for ways to soften the next attack. Chip and PIN are a big thing, because it greatly diminishes the value of the information that can be trapped by this malware, said Trustwave, a security company that estimates about 600 businesses have been victims of the new malware. The malware uses infected websites to infiltrate the computing devices that host point of sale systems or are used to make payments, such as PCs, tablets and smartphones. Merchants can install software that monitors their payments systems for intrusions, but the thing is you can’t just have anti-virus programs and think you are safe. Credit card data is particularly vulnerable because the malware can steal data directly from the magnetic stripe or keystrokes used to make card payments.

The point of sale system is low-hanging fruit because a lot of businesses don’t own their own POS system. They rent them, or a small business may hire a third party to implement their own point of sale system. The Payment Card Industry Security Standards Council issued new guidance this month to address security for outsourced digital payments. EMV-chip cards, which are designed to deter counterfeiting, would gut the value of any stolen data. With this magnetic stripe data, the crooks can clone the card and sell it on the black market. With chip and PIN, the data changes for each transaction, so each transaction is unique. Even if the malware grabs the data, there not a lot the crooks can do with it. The EMV transition in the U.S. has recently accelerated, driven in part by recent highprofile data breaches. Even with that momentum, the U.S. may still take longer than the card networks’ October 2015 deadline to fully shift to chip-card acceptance.

EMV does not by itself mitigate the threat of breaches. Two-factor authentication, or the use of a second channel or computing device to authorize a transaction, will likely share in the boost in investment stemming from data security concerns. The continued compromise of point of sale merchants through a variety of vectors, including malware such as Backoff, will motivate the implementation among merchants of stronger authentication to prevent unauthorized access to card data.

Backoff has garnered a lot of attention, including a warning from the U.S. government, but it’s not the only malware targeting payment card data. It is not the types of threats which are new, but rather the frequency with which they are occurring which has put merchants on their heels. There is also an acute need to educate small merchants on both the threats and respective mitigation techniques.. The heightened alert over data vulnerability should boost the card networks’ plans to replace account numbers with substitute tokens to protect digital payments. Tokens would not necessarily stop crooks from infiltrating point of sale systems, but like EMV technology, they would limit the value of the stolen data. There are two sides to the equation, the issuers and the merchants. To the extent we see both sides adopt tokenization, you will see fewer breaches and they will be less severe because the crooks will be getting a token instead of card data.

Posted in Best Practices for Merchants, Credit Card Security, Payment Card Industry PCI Security, Point of Sale Tagged with: access, account, account numbers, anti-virus programs, authentication, Backoff, card, card networks, chip, credit, Credit card data, credit-card, data, data breaches, devices, digital payments, EMV, magnetic stripe, Malware, Merchant's, Payment Card Industry, payments, PCs, PIN, PIN cards, point of sale, POS, POS system, programs, Security, security standards, Smartphones, software, system, tablets, tokenization, tokens, transaction, Trustwave, websites

Backoff POS Malware

Recent high-profile cyberattacks at retail giants like Target and Neiman Marcus have highlighted the importance of protecting your business against point-of-sale (POS) security breaches. Often, the smallest merchants are the most vulnerable to these types of cyberthreats. The latest of these POS attacks is known as Backoff, a malware with such brute force that the U.S. Department of Homeland Security (DHS) has gotten involved. The DHS recently released a 10-page advisory that warns retailers about the dangers of Backoff and tells them how they can protect their systems. Backoff and its variants are virtually undetectable low to zero percent by most antivirus software, thus making it more critical for retailers to make sure their networks and POS systems are secure.

How Backoff works

Backoff infiltrates merchant computer systems by exploiting remote desktop applications, such as Microsoft’s Remote Desktop, Apple Remote Desktop, Chrome Remote Desktop, Splashtop 2 and LogMeIn, among others. Attackers then use these vulnerabilities to gain administrator and privileged access to retailer networks. Using these compromised accounts, attackers are able to launch and execute the Backoff malware on POS systems. The malware then makes its way into computer and network systems, gathers information and then sends the stolen data to cybercriminals. The advisory warns that Backoff has four capabilities that enable it to steal consumer credit card information and other sensitive data: scraping POS and computer memory, logging keystrokes, Command & Control (C2) communication, and injecting the malware into explorer.exe. Although Backoff is a newly detected malware, forensic investigations show that Backoff and its variants have already struck retailers three times since 2013, the advisory revealed. Its known variants include goo, MAY, net  and LAST.

Prevent a Backoff attack

To mitigate and prevent Backoff malware attacks, the DHS’ recommendations include the following:

Configure network security. Reevaluate IP restrictions and allowances, isolate payment networks from other networks, use data leakage and compromised account detection tools, and review unauthorized traffic rules.

Control remote desktop access. Limit the number of users and administrative privileges, require complex passwords and two-factor authentication, and automatically lock out users after inactivity and failed login attempts.

Implement an incident response system. Use a Security Information and Event Management (SIEM) system to aggregate and analyze events and have an established incident response team. All logged events should also be stored in a secure, dedicated server that cannot be accessed or altered by unauthorized users.

Manage cash register and POS security. Use hardware-based point-to-point encryption, use only compliant applications and systems, stay up-to-date with the latest security patches, log all events and require two-factor authentication.

 

Posted in Point of Sale Tagged with: (POS) systems, antivirus software, Apple Remote Desktop, Backoff, cash register, Chrome Remote Desktop, credit-card, cyber attacks, cybercriminals, data, data leakage, Department of Homeland Security, desktop applications, DHS, goo, LAST, LogMeIn, Malware, MAY, Merchant's, Microsoft's, Neiman Marcus, net, network security, network systems, networks, payment networks, point of sale, point-to-point encryption, POS, remote, retailer networks, retailers, security breaches, Splashtop 2, target