TeslaCrypt was first discovered in February 2015, and was identified as a copycat of CryptoLocker.
Infecting computers through the Angler exploit for Adobe Flash. TeslaCrypt originally targeted computer games, searching for and encrypting 185 file extensions for 40 different games.
The ransom was set to be between 1.5 to 2.5 BitCoin (at the time roughly 200-1000 USD)
There were multiple versions seen until May 2016 the threat actors shut down the project and released the master decryption key
If you are interested in learning about other Ransomware families that we have published research reports on you can read more here