CFR's Cyber Operations Tracker is a dataset rather than a single intrusion report. The excerpt states that since 2005, 34 countries are suspected of sponsoring cyber operations, with China, Russia, Iran, and North Korea linked to 77 percent of suspected operations. It defines the tracked activity as state-sponsored denial of service, espionage, defacement, data destruction, sabotage, doxing, and financial theft, using open sources such as CSIS, Kaspersky, Florian Roth's APT spreadsheet, government releases, and security-company reporting. For DPRK-focused tracking, the usable evidence is the tracker inclusion of North Korea among major state sponsors, not a specific Lazarus intrusion or malware family.