What is CryptoLocker Ransomware?

CryptoLocker Ransomware is a type of ransomware that first appeared around 2013. It infiltrated computers through spam emails, which included an infected ZIP file attachment in its first wave of attacks. Attackers used encryption algorithms to encrypt infected files and systems, which then spread to other devices through network drives. A second version of CryptoLocker was spread through the peer-to-peer (P2P) botnet Gameover ZeuS, which used a botnet to send spam or fake emails that would lure victims into executing exploit kits.