How To Defend Point-Of-Sale Systems

US-CERT gives advice on defending POS systems against attacks like those against Target, Neiman Marcus.

Major hacks at retailers that include Target and Neiman Marcus have put a new spotlight on the security of point of sale (POS) systems. What may come as a surprise to some is that the recent memory-scraping malware attacks were nothing new. Last year, Visa published two Visa Data Security Alerts warning merchants of an increase in attacks targeting credit card data with specific references to memory-scraping malware.
The alerts were published in
April
and
August
. The first stated that Visa has seen an increase in network intrusions involving grocery merchants since January 2013. Augusts update used nearly the same verbiage but mentioned retail instead of grocery. The part thats of particular interest is how the attackers were carrying out the attacks.
Once inside the merchants network, the hacker will install memory parser malware on the Windows based cash register system in each lane or on Back-of-the-House (BOH) servers to extract full magnetic stripe data in random access memory (RAM).
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How To Defend Point-Of-Sale Systems