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The Changing State of Ransomware report finds that ransomware evolved as a threat considerably during 2017. Prevalent threats during the year included established ransomware families like Locky, Cryptolocker, and Cerber. But it was WannaCry that emerged as the most frequently seen ransomware threat in 2017: the notorious cryptoworm accounted for 9 out of every 10 ransomware detection reports by the end of the year.
But while the WannaCry ransomware family remained prevalent in the second half of 2017, the use of other ransomware by cyber criminals seemed to decline. It’s a phenomenon that F-Secure Security Advisor Sean Sullivan says points to amateur cyber criminals losing interest in ransomware.
“After the summer, there was a noticeable shift away from the kind of ransomware activity that we’ve seen in the last year or two,” said Sullivan. “The last couple of years saw cyber criminals developing lots of new kinds of ransomware, but that activity tapered off after last summer. So it looks like the ransomware gold rush mentality is over, but we already see hard core extortionists continuing to use ransomware, particularly against organisations because WannaCry showed everyone how vulnerable companies are.”
The report notes that while there were signs of ransomware declining as 2017 closed, there’s also evidence suggesting that ransomware use will gravitate to more corporate focused attack vectors, such as by compromising organisations via exposed RDP ports. The SamSam ransomware family is known to use this approach and has already infected several US-based organizations this year, including the city of Atlanta’s IT systems in a recent attack.*
Other significant findings in the report include:
More information Ransomware: How to Predict, Prevent, Detect & Respond
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