We have blogged in the past about Ransomware being a growing menace and that ONE SHOULD NOT PAY RANSOM if affected. Ransomware has now raised its ugly head up once again. Writers of Trojan.Ransomlock.G(a.k.a. Reveton) have updated their locking screen to induce panic and to blackmail the user into paying ransom.
Recently, blogger Kafeine found a ransomware sample which threatens to format and wipe all the documents on the compromised system if the user attempts to unlock the computer manually.
Figure 1. New Trojan.Ransomlock.G lock screen
Symantec Security Response has analyzed the malware sample and did not find any code related to this wiper functionality. In our tests we also manually removed the ransomware from the system and unlocked the computer without any formatting or files being deleted.
read more......http://www.symantec.com/connect/blogs/ransomware-extorting-money-panic-and-pressure