China-linked Red Menshen using BPFdoor kernel backdoor in telecom networks
Backdoor operates at the kernel level using BPF to passively inspect traffic and trigger on crafted packets, avoiding exposed ports or typical C2 indicators.
Tradecraft enables long-term persistence and covert access inside core network infrastructure, with very limited visibility from standard monitoring.
Interesting case of network-layer backdoor design rather than traditional userland implants.
[link] [comments]