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S1161malware

BPFDoor

a.k.a. JustForFun, Backdoor.Linux.BPFDOOR, Backdoor.Solaris.BPFDOOR.ZAJE

BPFDoor is a Linux based passive long-term backdoor used by China-based threat actors. First seen in 2021, BPFDoor is named after its usage of Berkley Packet Filter (BPF) to execute single task instructions. BPFDoor supports multiple protocols for communicating with a C2 including TCP, UDP, and ICMP and can start local or reverse shells that bypass firewalls using iptables.

Platforms: Linux

MITRE ATT&CK ↗

Linked entities · 13

usesT1070Indicator Removal usesT1480.002Mutual Exclusion usesT1480Execution Guardrails usesT1036.011Overwrite Process Arguments usesT1205.002Socket Filters usesT1564.011Ignore Process Interrupts usesT1036.009Break Process Trees usesT1070.004File Deletion usesT1070.006Timestomp usesT1059.004Unix Shell usesT1686Disable or Modify System Firewall usesT1027Obfuscated Files or Information usesT1690Prevent Command History Logging