build_downer
MITRE ATT&CK: S0471 View on attack.mitre.org
Aliases: build_downer
- First seen
- 2019-01-01 00:00:00
- Malware type
- downloader
- Family
- Malware family
- Operating systems
- windows
- Profile updated
- 2026-07-07 13:18:21
Targeted industries: government-and-public-sector technology-and-telecommunications
Targeted regions: country_code:jp
Context
build_downer is a downloader that has been used by BRONZE BUTLER since at least 2019.
Detection coverage
- 128 Sigma rules
Malware & tools used
- Native API (attack-pattern)
- Masquerade Task or Service (attack-pattern)
- Registry Run Keys / Startup Folder (attack-pattern)
- Steganography (attack-pattern)
- System Time Discovery (attack-pattern)
- Security Software Discovery (attack-pattern)
- Local Storage Discovery (attack-pattern)
- Ingress Tool Transfer (attack-pattern)
Used by threat actors
- BRONZE BUTLER (threat-actor)
Reports & references
- Trend Micro — Operation Endtrade Tick S Multi Stage Backdoors For Attacking Industries And Stealing Classified Data (report)
- MITRE ATT&CK — S0471 (report)