Chinese espionage group conducting intellectual property theft from Japanese defense and technology organizations since 2006. This profile is mapped to MITRE ATT&CK G0060 and covers attribution, tooling, targeting, and defensive recommendations based on observed campaigns.
Overview & Attribution
BRONZE BUTLER (also tracked as Tick, REDBALDKNIGHT) is a threat group attributed to China. The group primarily targets Japan, South Korea, defense, technology for intelligence collection and operational objectives aligned with state interests.
This group is tracked as G0060 in the MITRE ATT&CK framework. All techniques referenced in this report are mapped to ATT&CK for consistent threat modeling and detection engineering.
Arsenal & Tools
Known tools and malware associated with BRONZE BUTLER include:
- Daserf
- xxmm
- Datper
- ABK Downloader
Targeting & Operations
BRONZE BUTLER operations focus on Japan, South Korea, defense, technology. The group typically gains initial access through spear-phishing, exploitation of public-facing applications, or strategic web compromises before deploying custom implants for persistent access and data exfiltration.
Organizations in the Japan sector should treat BRONZE BUTLER as a relevant threat and validate their detection coverage against the MITRE ATT&CK techniques listed below.
MITRE ATT&CK Mapping
Key techniques observed in BRONZE BUTLER operations:
| Technique ID | Technique Name | Tactical Context |
|---|---|---|
| T1189 | T1189 | Observed in BRONZE BUTLER campaigns |
| T1566.001 | T1566.001 | Observed in BRONZE BUTLER campaigns |
| T1059.001 | T1059.001 | Observed in BRONZE BUTLER campaigns |
| T1005 | T1005 | Observed in BRONZE BUTLER campaigns |
Full ATT&CK mapping: https://attack.mitre.org/groups/G0060/
Notable Campaigns
This threat group has been active in operations targeting Japan, South Korea, defense, technology. Security researchers have documented campaigns involving Daserf and other tools deployed against organizations in multiple countries. Attribution confidence varies by campaign, but consistent infrastructure and TTP overlap links activity to China-nexus operations.
Detection & Defense
Recommended defensive measures against BRONZE BUTLER:
- Network monitoring: Detect C2 beaconing patterns associated with Daserf and related implants
- Endpoint detection: Deploy behavioral rules for the ATT&CK techniques above, particularly T1189 and T1566.001
- Email security: Implement robust phishing defenses including URL sandboxing and attachment detonation
- Patch management: Prioritize patching of internet-facing applications exploited by this group
- Threat hunting: Proactively hunt for IOCs and behavioral indicators mapped to G0060 in MITRE ATT&CK
How Mjolnir Security Can Help
Defend Against BRONZE BUTLER
Mjolnir Security provides tailored threat intelligence, detection engineering, and incident response services to help organizations defend against China-nexus threat actors.
Contact us: mjolnirsecurity.com
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