MITRE ATT&CK / Software / S9015

BRICKSTORM

ID
S9015
Type
Malware
Platforms
ESXi, Linux, Network Devices, Windows
Source
attack.mitre.org
MITRE last modified
23 Apr 2026

BRICKSTORM is a cross-platform backdoor with variants written in Go and Rust that facilitates command and control, the ingress transfer of other malware, and the exfiltration of data.[1][2][3][4] BRICKSTORM has also been created from a .NET application using ahead-of-time (AOT) compilation to blend in within victim environments.[1] BRICKSTORM was first observed in April 2024.[5] BRICKSTORM has previously been leveraged by People's Republic of China (PRC) state-nexus actors identified as UNC6201, UNC5221, WARP PANDA, PunyToad, and SYLVANITE.[6][7][1][8][9][10][3][4]

Techniques used (25)

References

  1. CISA BRICKSTORM UNC5221 AR25-338A February 2026
  2. Picus Security BRICKSTORM UNC5221 October 2025
  3. Resecurity UNC5221 BRICKSTORM F5 Big-IP October 2025
  4. Google BRICKSTORM September 2025
  5. Google UNC5221 BRICKSTORM SPAWNCHIMERA April 2024
  6. Cloudflare 2026 Threat Report New Threat Actors March 2026
  7. CrowdStrike BRICKSTORM WARP PANDA UNC5221 December 2025
  8. Dragos SYLVANITE MuddyWater Electrum March 2026
  9. NVISO BRICKSTORM April 2025
  10. Google BRICKSTORM GRIMBOLT UNC5221 UNC6201 February 2026