Target CEO Gregg Steinhafel confirmed in a CNBC interview on Monday that malware introduced on point-of-sale devices is what enabled thieves to steal 40 million cards and other personal information.
The ransomware, being called "Prison Locker" and "Power Locker" on underground forums, uses a harder-to-crack encryption method than comparable malware locking victims out of their computer.
World of Warcraft players were forced to halt their virtual gaming to combat a trojan designed to compromise account credentials - even those with two-factor authentication enabled.