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Home/ATT&CK/Groups/G1021
MITRE ATT&CK Group

Cinnamon Tempest (G1021)

DEV-0401Emperor DragonflyBRONZE STARLIGHT
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[Cinnamon Tempest](https://attack.mitre.org/groups/G1021) is a China-based threat group that has been active since at least 2021 deploying multiple strains of ransomware based on the leaked [Babuk](https://attack.mitre.org/software/S0638) source code. [Cinnamon Tempest](https://attack.mitre.org/groups/G1021) does not operate their ransomware on an affiliate model or purchase access but appears to act independently in all stages of the attack lifecycle. Based on victimology, the short lifespan of each ransomware variant, and use of malware attributed to government-sponsored threat groups, [Cinnamon Tempest](https://attack.mitre.org/groups/G1021) may be motivated by intellectual property theft or cyberespionage rather than financial gain.(Citation: Microsoft Ransomware as a Service)(Citation: Microsoft Threat Actor Naming July 2023)(Citation: Trend Micro Cheerscrypt May 2022)(Citation: SecureWorks BRONZE STARLIGHT Ransomware Operations June 2022)

▪Techniques used (19)

T1047Windows Management InstrumentationT1574.001DLLT1105Ingress Tool Transfer

▪Software used (8)

S0633SlivertoolS0664Pandoramalware
G1021 on MITRE ATT&CK →
T1484.001Group Policy Modification
T1567.002Exfiltration to Cloud Storage
T1588.002Tool
T1078Valid Accounts
T1657Financial Theft
T1090Proxy
T1078.002Domain Accounts
T1190Exploit Public-Facing Application
T1059.006Python
T1140Deobfuscate/Decode Files or Information
T1021.002SMB/Windows Admin Shares
T1572Protocol Tunneling
T1080Taint Shared Content
T1543.003Windows Service
T1059.001PowerShell
T1059.003Windows Command Shell
S0013PlugXmalware
S1096Cheerscryptmalware
S0357Impackettool
S0154Cobalt Strikemalware
S1097HUI Loadermalware
S1040Rclonetool

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.