A dangerous Linux backdoor called BPFDoor has returned in a more powerful form, with researchers uncovering new variants built to stay invisible inside critical network infrastructure. Linked to a China-nexus threat actor group known as Red Menshen, these updated versions target Linux servers embedded deep inside global telecom networks. Unlike earlier strains, the new variants […] The post New BPFDoor Variants Use Stateless C2 and ICMP Relays to Evade Detection appeared first on Cyber Security News.