The Security Skeptic

In today's Interisle Insights, Colin Strutt looks at cybercrime activity collected at the Cybercrime Information Center for the month of April 2025.We point out anything that strikes us as particularly interesting in overall numbers as well as significant changes in ranking for Top Level Domains (TLDs), Registrars, and Hosting Networks. Read Cybercrime Reported in April 2025. Interisle Insights is a reader-supported publication. To receive new posts and support our work, consider becoming a free or paid subscriber. Join now!

Malware activity reports for the quarter are now posted at the Cybercrime Information Center. Our key statistics show small quarter-over-quarter increases in malicious IP address malware records (Traffic Injectors and Attackware) and unique IPv4 addresses reported as serving or distributing malware, and but meaningful decreases in both endpoint and IoT malware reported. Read Malware Trends: January - March 2025

In this Interisle Insights article, we take a closer look at our data to better understand what’s hosted at three autonomous systems which have appeared at or near the top in recent quarters. We’ll also review who’s being targeted by these attacks and what corresponding name and address resources are most frequently exploited. Autonomous systems are blocks of Internet addresses, which you can compare to "neighborhoods" in a city. And like any city, some neighborhoods are safe and some are not. The full article, The World's Phishiest Neighborhoods, is hosted here.

My Interisle colleagues and I today published our 2024 Cybercrime Suppy Chain study. We analyzed 16 million cybercrime events to expose a dramatic rise in criminal exploitation of name, address, hosting, and financial supply chains. Our year-over-year findings show that cybercriminals exploit lax policies to easily and cheaply obtain resources for phishing, malware, and spam campaigns. In our report, we provide actionable insights for those aiming to curb cybercrime. Among the major findings in the study, Interisle reports that: The total number of malware, phishing, and spam attacks grew year-over-year by nearly 54%, to nearly 16.3 million attacks. Spam doubled,...

Malware quarterly reports for July-September 2024 is now posted at the Cybercrime Information Center. For the period... Malware identified as targeting endpoint devices increased 277% over the prior period. WordPress blog sites used for malware accounted for nearly all the malicious documents reported for this period. We continue to see an uptick in malicious scripts. IPv4 addresses reported for exhibiting characteristics of attackware and traffic injectors increased 38% to just under 1 million. ASNs in China and India again have the most IPv4 addresses reported for hosting malware. More malware trends for the period at https://www.cybercrimeinfocenter.org/malware-trends-july-september-2024. For historical reporting of...