Anti-virus firm Symantec examined a sophisticated malware program dubbed as(Trojan.Cryptodefense) ransomware, which appeared in the end of the last month. The software program holds the victims’ computer files hostage by wrapping them with strong encryption until the victim pays a ransom fee to get them decrypted. It is estimated that the cybercriminals received more than $34,000 worth of Bitcoin in just a month, which shows the effectiveness of their scam. The malware developer failed to realize that the private key is also left concealed on the user’s computer in a file folder with application data.
Source: https://thehackernews.com/2014/04/dumb-ransomware-developer-leaves.html