Malware researchers warn about a stealthy backdoor program that has been used by a Chinese threat actor to compromise Linux servers at government and private organizations around the world. While the backdoor is not new and variants have been in use for the past five years, it has managed to fly under the radar and have very low detection rates. One reason for its success is that it leverages a feature called the Berkeley Packet Filter (BPF) on Unix-based systems to hide malicious traffic.
BPFdoor was named by researchers from PwC Threat Intelligence who attribute it to a Chinese group they call Red Menshen. The PwC team found the threat while investigating several intrusions throughout Asia last year and included a short section about it in their annual threat report released late last month
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