Yea you can check here:
Cryptolocker: A Thriving Menace
https://www-secure.symantec.com/connect/blogs/ransomcrypt-thriving-menace
Additional information about Ransomware threats
http://www.symantec.com/docs/TECH211589
Recovering Ransomlocked Files Using Built-In Windows Tools
https://www-secure.symantec.com/connect/articles/recovering-ransomlocked-files-using-built-windows-tools
Trojan.Cryptolocker
http://www.symantec.com/security_response/writeup.jsp?docid=2013-091122-3112-99&tabid=2
Trojan.Cryptolocker - Removal
http://www.symantec.com/security_response/writeup.jsp?docid=2013-091122-3112-99&tabid=3