UDPOS PoS malware exfiltrates credit card data DNS queries

Haythem Elmir
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A new PoS malware dubbed UDPoS appeared in the threat landscape and implements a novel and hard to detect technique to steal credit card data from infected systems.

The UDPoS malware was spotted by researchers from ForcePoint Labs, it relies upon User Datagram Protocol (UDP) DNS traffic for data exfiltration instead of HTTP that is the protocol used by most POS malware.

The UDPoS malware is the first PoS malicious code that implements this technique disguises itself as an update from LogMeIn, which is a legitimate remote desktop control application.

“According to our investigation, the malware is intended to deceive an unsuspecting user into executing a malicious email, link or file, possibly containing the LogMeIn name,” reads a blogpost published by LogMeIn noted.

“This link, file or executable isn’t provided by LogMeIn and updates for LogMeIn products, including patches, updates, etc., will always be delivered securely in-product. You’ll never be contacted by us with a request to update your software that also includes either an attachment or a link to a new version or update.”

The UDPoS malware only targets older POS systems that use LogMeIn.

“However, in amongst the digital haystack there exists the occasional needle: we recently came across a sample apparently disguised as a LogMeIn service pack which generated notable amounts of ‘unusual’ DNS requests. Deeper investigation revealed something of a flawed gem, ultimately designed to steal magnetic stripe payment card data: a hallmark of PoS malware.” reads the analysis published by ForcePoint.

The command and control (C&C) server are hosted by a Swiss-based VPS provider, another unusual choice for such kind of malware.

 

http://securityaffairs.co/wordpress/68892/malware/udpos-pos-malware.html

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