#backdoor

A North Korean-linked actor compromised Trading Technologies' X_TRADER, used it to breach 3CX, and shipped signed, trojanised VoIP clients to its customers — the first documented case of one software supply chain attack causing another.

A sophisticated multi-year supply chain attack compromised the widely used xz compression library, embedding a backdoor in liblzma that targeted OpenSSH authentication on systemd-based Linux distributions. The attacker, operating under the persona 'Jia Tan,' spent over two years building trust as a contributor before gaining maintainership and inserting the malicious code.