Chinese Hackers Attacking Singapore’s Telecommunications Sector to Compromise Edge Devices

**Executive summary:** A highly sophisticated APT (UNC3886) conducted an 11-month espionage campaign against Singapore’s four major telcos using a zero-day to bypass perimeter defenses, deploying rootkits for persistence and exfiltrating network configuration data; a coordinated CSA/IMDA-led operation detected and contained the intrusion before critical service disruption occurred.