BRONZE BUTLER

Overview

BRONZE BUTLER is a cyber espionage group with likely Chinese origins that has been active since at least 2008. The group primarily targets Japanese organizations, particularly those in government, biotechnology, electronics manufacturing, and industrial chemistry.

Targets

Diplomacy · Engineering · Industrial · Infrastructure · Manufacturing · Media · Political party · Private sector

Regions

China · Japan · Russian Federation · South Korea

Capabilities

• Exploitation of public-facing / client applications — ATT&CK T1203
• Custom malware/implant development — ATT&CK: 7 attributed custom malware families

TTPs — 40 techniques across 12 tactics

Tools & malware (14)

Mimikatz · build_downer · cmd · ABK · at · BBK · schtasks · down_new · Daserf · Net · ShadowPad · Windows Credential Editor · gsecdump · Avenger

Reporting (3)

• Operation ENDTRADE: TICK’s Multi-Stage Backdoors for Attacking Industries and Stealing Classified Data — Chen, J. et al
• REDBALDKNIGHT/BRONZE BUTLER’s Daserf Backdoor Now Using Steganography — Chen, J. and Hsieh, M
• BRONZE BUTLER Targets Japanese Enterprises — Counter Threat Unit Research Team