If your going to paraphase from the Cisco diagnosis, at least get it right.
You don't install a keylogger to scan memory. The original report states:-
"The downloaded binary, FindStr, installs a keylogger and scans the memory of the PoS device for number sequences that could be credit card numbers."
It then goes on to describe the uses of the keylogger, to capture passwords, and Findstr to scan the memory to find credit card numbers.