Hackers stole 40 million credit and debit cards from US retailer Target. Target CEO Gregg Steinhafel described the attack as a punch in the gut US CERT warned on 2 January 2014, many examples of POS malware will search the devices memory, hunting for unencrypted credit card information. The data may be *unencrypted* while being processed in the device’s memory, but the data may still be there to be unencrypted. Target is just one (albeit large) retailer to have fallen victim to a similar attack.”]
Source: https://grahamcluley.com/ram-scraping-malware-installed-target-tills/