GoldenEyeDog Subgroup Linked to DigiCert Breach and CodeSigning Certificate Theft

Cybersecurity researchers have attributed the April 2026 DigiCert security incident to a threat activity cluster dubbed CylindricalCanine Expel which shared technical details of the event described the threat actor as a subgroup of GoldenEyeDog aka APTQ27 Dragon Breath and Miuuti Group a Chinese cybercrime group known for its targeting of the gambling and gaming sectors using