An analysis of three popular forums used by ransomware operators reveals a complex ecosystem with many partnerships. Ransomware samples and builders are going for anywhere between $300 to $4,000, with ransomware-as-a-service rentals costing $120 to $1,900 per year. Kaspersky researchers found that the general economy of ransomware is well-developed and complex, with several actors supplying services to one another The forums host hundreds of various advertisements and offers, for everything from the sale of source code to recruitment advertisements for affiliates.
Source: https://threatpost.com/ransomware-4k-cyber-underground/166145/