TA419 AitM Phishing Targets US AI Policy Experts via Microsoft
China-aligned threat actor TA419 is conducting sophisticated adversary-in-the-middle credential phishing campaigns against U.S. AI policy experts at think tanks, universities, and law firms, impersonating prominent figures including Anthropic employees and former White House officials. The attacks leverage Frameless BitB techniques combined with OneDrive-hosted AitM pages to silently harvest Microsoft session cookies without alerting victims. This espionage campaign reflects Beijing's strategic intelligence priorities around U.S. AI policy, model regulation, and export controls.