This became the template for most subsequent types of ransomware that have appeared since. Two years later, CryptoLocker was released, encrypting user files and demanding a ransom for the key to decrypt them. Reveton locked users out of their computers unless they paid a "fine" through a payment service such as Ukash. But it wasn't until 2012, with the arrival of the Reveton worm, that attempts to hold users' computers for ransom payments became commonplace.
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It used simple symmetric encryption, and it was relatively easy to produce tools to decrypt files that PC Cyborg had encrypted. The first ransomware virus was thought to be PC Cyborg, which appeared in 1998.
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And Android mobile ransomware threats have grown 15 times higher than they were in April 2015. Ransomware is on the rise as Trend Micro has blocked over 100 million threats since October 2015.
Ransom prices can reach $830 or more (typically in bitcoins). If you visit a compromised website or click on a spammed email that contains ransomware, it can attack the data on your computer or mobile device. With the right tools, you can prevent, detect and respond quickly to ransomware attacks threatening your organization. Ransomware attacks are becoming more sophisticated and cyber security professionals are taking action. Today’s security leaders are faced with an uphill battle against the ever-changing cyber threat landscape. Some types of ransomware also search for other computers to infect on the same network, and others also infect their hosts with more malware, such as banking Trojans that steal users' online banking login credentials.
Often the ransom demand comes with a deadline, and if payment is not received by that deadline, the ransom demanded may increase. Once the encryption is complete, the ransomware displays a message demanding a payment – usually in Bitcoins – for the key to decrypt the data. Ransomware locks your computer or encrypts your files, holding them ransom until you pay a fee to the cyber criminals who hold them hostage. Don't Allow criminals to hold your computer hostage What is ransomware?