In recent months we've seen an exponential increase in the number of ransomware variants as cybercriminals see them as low-hanging fruit to generate revenue.
But with the increase in popularity of digital currencies such as Bitcoin, will the theft of digital wallets be the next avenue of exploitation?
A key difference between ransomware and wallet theft is that the victim has no decision as to whether to pay the attacker.
Hackers have stolen $400,000 (£290,000) of the virtual currency Stellar Lumen in an online attack on Saturday. The group hijacked the server that hosts BlackWallet, a web-based wallet application that stores lumens and stole 669,920 from users' accounts.