Between April 2014 and June 2015, the IC3 received 992 CryptoWall related complaints, with victims reporting losses totaling over $18 million. Ransomware implements a classic extortion scheme typically demanding that victims pay ransom in Bitcoin or other virtual currency. The FBI recently issued an alert to highlight the possible financial impact on victims and confirmed that CryptoWall is still the most active malware belonging to the ransomware family. The financial impact to victims goes beyond the ransom fee itself, which is typically between $200 and $10,000.”]
Source: https://securityaffairs.co/wordpress/38048/cyber-crime/fbi-cryptowall-cost-18m.html