The ModPOS malware has pilfered “multiple millions” of debit and credit cards from the unnamed but large retail companies incurring millions of dollars in damages. The attackers have operated in a low-key, ultra professional manner since late 2013 and has only come to light after weeks of painstaking reverse-engineering efforts by malware experts. They have kept mum, too. Cybercrime forums are entirely devoid of references to the malware. “This is POS [point-of-sale] malware on steroids,” iSight Partners senior director Steve Ward says. “We have been examining POS malware forever, for at least the last eight years and we have never seen the level of sophistication in terms of development …[engineers say] it is the most sophisticated framework they have ever put their hands on.” Security experts from ESET, Tripwire, Lieberman Software and Alert Logic have the following comments on it.