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Computer Emergency Response Team of Mauritius (CERT-MU)
Computer Emergency Response Team of Mauritius>Ransomware: Evolution of a new threat

Ransomware: Evolution of a new threat


The plague known as ransomware (including crypto-ransomware) has been affecting a large number of devices other the past two years and counting. Ransomware is a type of malware that, upon infecting a device, blocks access (encrypts) to it or to some or all of the information stored on it. In order to unlock either the device or the data, the user is required to pay a ransom.
Ransomware (including crypto-ransomware) has been known about for years at least since 1989 when the first-known malware capable of encrypting file names (the AIDS Trojan) was discovered. The first real ransomware epidemic started in 2010 with thousands infected devices in Russia and some neighbouring countries encountering cryptic windows that covered all other windows on their desktop.
The first highest peak registered was in July 2014 with more than 274 thousand users encountering some form of ransomware. The next peak was registered in April 2015, when 282.5 thousand users were attacked with ransomware. This was provoked by several groups of malware, and about 10% of those affected encountered encryption ransomware. However, ransomware achieve an all-time-high with more than 428.4 thousand users attacked in October 2015, 9.38% of which were hit with encryption ransomware. March 2016 was when another surge of ransomware attacks took place, the situation was very different: over half (51.9%) of those who encountered Trojan-Ransom malware were dealing with encryptors.
Home users were the preferred target of ransomware two years ago but the trend is changing towards corporate users as well, security experts says that  ransomware attack has doubled from 6.8 percent in 2014 to 13 percent for corporate users.

Source:
Threatpost
 
Kaspersky Lab ZAO - Secure List
 
 
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Mauritian Computer Emergency Response Team (CERT-MU)
National Computer Board
7th Floor, Stratton Court
La Poudriere Street
Port Louis