Recovering from a supply-chain attack: What are the lessons to learn from the 3CX hack?

The report outlines a multi-stage supply-chain attack where Lazarus-linked actors trojanized a deprecated X_TRADER installer that installed VEILEDSIGNAL malware on a 3CX employee’s personal PC; stolen credentials were then used to compromise 3CX and push information-stealing malware to customers, impacting organizations in the energy and financial sectors and leveraging an optional Windows signature verification vulnerability (CVE-2013-3900). The article also provides defensive recommendations including verified downloads, MFA, privileged access management, patching, and endpoint protection.