Cybercrime, Nobelium exploits a new custom malware: Ceeloader Mandiant cybersecurity experts: The APT (aka UNC2452) also shows two distinct clusters of activity, UNC3004… Cybercrime, Nobelium exploits a new custom malware: Ceeloader 7 December 2021 Francesco Bussoletti Cyber, Defence and Security Mandiant cybersecurity experts: The APT (aka UNC2452) also shows two distinct clusters of activity, UNC3004 and UNC2652.