Proofpoint ties TA419 hackers to phishing of US AI policy experts
Proofpoint researchers reported that China-linked group TA419 ran a July phishing campaign impersonating US officials, including a former White House science and technology policy staffer, to steal credentials from AI experts at US think tanks, universities, defense contractors and law firms. The campaign followed similar activity in February, when the group posed as an Anthropic employee to target a think tank AI policy expert, and is part of a pattern Proofpoint says dates back to at least April 2025.