Robuta

https://www.knowbe4.com/ransomware-knowledgebase/teslacrypt
TeslaCrypt Ransomware used exploit kits and malvertising to attack its victims. In May of 2016 the developers shut this strain down with an apology.
teslacryptransomware
https://www.trendmicro.com/en_us/research/21/b/new-in-ransomware.html
In this entry, we give an overview of new ransomware discoveries. This includes a new ransomware family dubbed Seth-Locker, and developments in the variants...
new inransomwaresethlockerteslacrypt
https://www.helpnetsecurity.com/2015/04/28/there-s-now-a-decryption-tool-for-teslacrypt-ransomware/
"Here's some very good news for victims of the TeslaCrypt ransomware: Cisco researchers have created a tool for them to decrypt the files themselves and
decryptiontoolteslacryptransomwarehelp