Artificial intelligence is playing an important role in the fight against payment card fraud, says Gord Jamieson, senior director of Canada risk services at Visa. He'll offer a keynote presentation on the latest fraud trends at Information Security Media Group's Cybersecurity Summit in Toronto Sept 24-25.

Even with the uptake of cloud services, many large enterprises still hold data on mainframes, says Philip MacLochlainn of IBM. But the diversity of computing environments around mainframes is rapidly changing, which increases the risk of data breaches, he explains.

Ransomware-wielding attackers treat infecting endpoints as a business and put customer relationship management principles to work, says Bill Siegel, CEO of ransomware incident response firm Coveware. He notes criminals "go after the low-hanging fruit because it's cheap and the conversion rate is high."

Cybercriminals are "upping their game" by stealing and then auctioning off on the dark web administrative access credentials to healthcare organizations' clinician and patient portals, says Etay Maor of IntSights.

This week's ISMG Security Report analyzes the cost of business email compromise attacks and the recent arrest of dozens of suspects. Also featured: updates on the easy availability of low-cost hacking tools and the latest payment card fraud trends.

Insider threats are difficult to counter. What happens when an employee goes rogue, and how do you catch them? Charles Carmakal of Mandiant, who says his firm is dealing with more insider threat investigations, shares tips for better defenses.

In the past year, cybercriminals behind two of the biggest ransomware attacks have abandoned other techniques in favor of exploiting remote desktop protocol. Matt Boddy of Sophos explains why RDP attacks are so popular - and what you can do to discourage them.

This week's ISMG Security Report takes a close look at whether an iPhone hacking campaign may be linked to Android spying campaigns by China. Plus: Do ransomware gangs target organizations that have cyber insurance?

ISMG and Cybereason visited Dallas on their "Indicators of Behavior" roundtable dinner tour. And Cybereason CSO Sam Curry says the discussion validated the notion that it's time to reimagine incident detection and response.

Security needs to be reinvented for the internet of things, and start-up companies can play a critical role, says Robin Saxby, the former CEO and founder of Arm Holdings, a U.K.-based semiconductor company, who now invests in start-up firms.