BRUSHFIRE
- ID
- S9011
- Type
- Malware
- Platforms
- Linux, Network Devices
- Source
- attack.mitre.org
- MITRE last modified
- 23 Apr 2026
BRUSHFIRE is a passive backdoor written in C that executes in-memory within an existing process. First reported in March 2025, BRUSHFIRE has been observed in activity attributed to People's Republic of China (PRC) state-affiliated threat actors, including UNC5221 and SYLVANITE.[1][2][3]
Techniques used (4)
- T1048.002 Exfiltration Over Asymmetric Encrypted Non-C2 Protocol
- T1140 Deobfuscate/Decode Files or Information
- T1205 Traffic Signaling
- T1620 Reflective Code Loading