Online gambling sites remain the top targets for distributed denial of service (DDoS) attacks, but Bitcoin exchanges are increasingly finding digital bulls-eyes on their backs.

This week, cyber security software and services outfit Imperva released its Global DDoS Threat Landscape Q3 2017 report, detailing the targets and methods of the digital miscreants who bombard websites with data, sometimes seeking a ransom payment to stop the attack, other times to hobble a competitor.

As one might expect from previous reports of this type, Imperva found that over one-third of network layer attacks targeted online gambling sites and related services. Gambling topped all other industries with 34.5% of attacks, while gaming sites scored 14.4%, and internet services – including business process outsourcing companies working for gambling operators – ranked third with 10.8%.

The attacks on gambling operators and related services contributed to what Imperva called the “atypical” appearance of both Taiwan and the Philippines on the list of Top Attacked Countries, reportedly the result of some “large campaigns” targeting Asian-facing gambling operators.