Foster City, California declared a state of emergency following a ransomware attack that disabled municipal IT systems and city services, with no confirmed ransomware variant, threat actor, or technical indicators of compromise publicly attributed as of this report. The incident follows the established SLTT ransomware kill chain and serves as a sector-relevant threat signal for any organization operating public-sector or municipal infrastructure. Organizations should audit remote access points for weak authentication, confirm backup isolation and restoration readiness, and review ransomware-specific incident response playbooks against CISA StopRansomware and MS-ISAC SLTT guidance.