(Symantec, 2015 Internet Security Threat Report, Volume 20 (Apr. Ransomware attacks grew 113 percent in 2014.Ĭrypto-ransomare was seen 45 times more frequently. Ransomware variants have grown very rapidly as one of various cyber attacks. Also Cryptolocker began appearing about September 2013 and continued to grow rapidly. The Gameover Zeus network was as a common distribution mechanism for Cryptolocker. Gameover Zeus, which first emerged around September 2011, operates silently on victim computers to funnel stolen banking credentials back to the attackers. Ransomware attacks re-organized around a new type of extortion by Cryptolocker. It locks the Windows' screen and demands payment. These crypto ransomware were use of RSA public key cryptography.Īlso the first known locker ransomware was the 2010 "Winlock" trojan. The first known ransomware was the 1989 "AIDS" trojan (also known as "PC Cyborg"). Locker ransomware locks the screen and demands payment. Crypto ransomware encrypts personal files/folders (e.g., the contents of your documents, spreadsheets, pictures, videos and etc.). There are two types of ransomware such as Crypto and Locker ransomware.
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