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MITRE ATT&CK® Group

G1021: Cinnamon Tempest

Cinnamon Tempest is a China-based threat group that has been active since at least 2021 deploying multiple strains of ransomware based on the leaked Babuk source code. Cinnamon Tempest 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 may be motivated by intellectual property theft or cyberespionage rather than financial gain.[1][2][3][4]

EnterpriseG1021GroupObject v1.0Modified
Glexia's Take · Automated analysis

Security context for executives and security teams

Automation confidenceMedium

Cinnamon Tempest matters because ATT&CK describes a ransomware-deploying group whose activity may also support intellectual property theft or cyberespionage rather than simple financial extortion. For leaders, the practical issue is not just ransomware recovery; it is whether the organization can detect credential abuse, lateral movement, tool staging, cloud-storage exfiltration, and disruption risk before encryption or data loss decisions become urgent.

Executive priority

Prioritize this as a resilience and sensitive-data risk scenario. The ATT&CK relationships point to valid account abuse, public-facing application exploitation, Windows administrative execution, Group Policy modification, file transfer, proxy/tunneling, exfiltration to cloud storage, and ransomware affecting Windows and ESXi. Executives should ask whether identity controls, internet-facing vulnerability management, backup/restore readiness, ESXi recovery, and incident response decision authority are tested together—not treated as separate control domains.

Technical view

MITRE provides no group-level detection text, so coverage should be validated from the related techniques and software. SOC and IR teams should test visibility for Windows execution via WMI, PowerShell, and command shell; lateral movement over SMB/admin shares; domain account misuse; GPO and Windows service changes; ingress tool transfer; proxy or tunneled C2; Rclone-like cloud-storage transfers; and ransomware-relevant activity on Windows and ESXi. Relationship context includes PlugX, Cobalt Strike, Impacket, Sliver, Pandora, Rclone, Cheerscrypt, and HUI Loader, so detections should focus on behaviors and control-plane evidence rather than relying only on tool names or hashes.

Likely telemetry

  • Identity provider and Active Directory authentication logs, including privileged and domain account activity
  • Endpoint process, command-line, PowerShell, WMI, service creation/modification, and DLL loading telemetry on Windows systems
  • SMB, Windows admin share, and SYSVOL/GPO change evidence
  • EDR or host telemetry for tool staging, script execution, deobfuscation, and unusual file writes
  • Network proxy, DNS, firewall, and flow logs for proxying, tunneling, external tool transfer, and C2-like patterns

Detection direction

  • Validate detections against behavior chains: public-facing access or credential abuse followed by administrative execution, lateral movement, tool transfer, exfiltration, and ransomware staging.
  • Tune for legitimate administration noise around WMI, PowerShell, Windows command shell, SMB admin shares, GPO changes, and Windows service changes; require context such as account role, source host, timing, and change ticket status.
  • Do not depend solely on signatures for Cobalt Strike, Sliver, Impacket, Rclone, PlugX, HUI Loader, Pandora, or Cheerscrypt because several are legitimate or dual-use tools and may vary by deployment.
  • Confirm visibility into ESXi and virtualization management planes if they support critical workloads, since related ransomware context includes ESXi as well as Windows.
  • Correlate cloud-storage egress and Rclone-like behavior with endpoint execution and identity context to distinguish approved synchronization from suspicious bulk transfer.

Mitigation priorities

  • Harden identity first: enforce least privilege, privileged access review, strong authentication, service account governance, and rapid credential revocation procedures.
  • Reduce initial-access exposure through disciplined patching, configuration review, and monitoring of internet-facing applications and services.
  • Restrict and monitor administrative pathways such as SMB admin shares, WMI, PowerShell, remote command execution, GPO modification, and service creation.
  • Control tool transfer and exfiltration paths with egress governance, cloud-storage usage policy, proxy logging, and alerting on unusual transfer patterns.
  • Prepare for ransomware operations by validating immutable/offline backups, ESXi recovery procedures, segmentation, and executive incident decision playbooks.
Additional notes and limits

The most important decision value is the overlap between ransomware operations and possible IP or espionage motivation noted by MITRE. That means response planning should include both restoration and data-compromise investigation. The related techniques emphasize identity, Windows administration, cloud-storage exfiltration, and virtualization risk; these are the control areas most likely to determine whether defenders see the activity early.

The group object has no specified platforms, tactics, or official detection text. Platform and tactic guidance above is inferred only from supplied ATT&CK relationships to techniques and software, not from a complete procedure list. Local telemetry, asset exposure, and business process context are required before assessing actual risk or detection coverage.

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Official MITRE ATT&CK definition

Cinnamon Tempest

Cinnamon Tempest is a China-based threat group that has been active since at least 2021 deploying multiple strains of ransomware based on the leaked Babuk source code. Cinnamon Tempest 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 may be motivated by intellectual property theft or cyberespionage rather than financial gain.[1][2][3][4]

View the same entry on attack.mitre.org (MITRE-hosted reference; in-page links above use the Glexia ATT&CK library.)

Glexia analysis

How security teams should use this page

Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.

ATT&CK relationship table

Techniques used

This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.

19 rows
DomainIDNameRelationship / procedure
EnterpriseT1047Windows Management Instrumentation

Cinnamon Tempest has used Impacket for lateral movement via WMI.[1][5]

EnterpriseT1574.001DLLSub-technique

Cinnamon Tempest has used search order hijacking to launch Cobalt Strike Beacons.[1][4] Cinnamon Tempest has also abused legitimate executables to side-load weaponized DLLs.[5]

EnterpriseT1105Ingress Tool Transfer

Cinnamon Tempest has downloaded files, including Cobalt Strike, to compromised hosts.[5]

EnterpriseT1484.001Group Policy ModificationSub-technique

Cinnamon Tempest has used Group Policy to deploy batch scripts for ransomware deployment.[1]

EnterpriseT1567.002Exfiltration to Cloud StorageSub-technique

Cinnamon Tempest has uploaded captured keystroke logs to the Alibaba Cloud Object Storage Service, Aliyun OSS.[5]

EnterpriseT1588.002ToolSub-technique

Cinnamon Tempest has used open-source tools including customized versions of the Iox proxy tool, NPS tunneling tool, Meterpreter, and a keylogger that uploads data to Alibaba cloud storage.[5][4]

EnterpriseT1078Valid Accounts

Cinnamon Tempest has used compromised user accounts to deploy payloads and create system services.[5]

EnterpriseT1657Financial Theft

Cinnamon Tempest has maintained leak sites for exfiltrated data in attempt to extort victims into paying a ransom.[1]

EnterpriseT1090Proxy

Cinnamon Tempest has used a customized version of the Iox port-forwarding and proxy tool.[5]

EnterpriseT1078.002Domain AccountsSub-technique

Cinnamon Tempest has obtained highly privileged credentials such as domain administrator in order to deploy malware.[1]

EnterpriseT1190Exploit Public-Facing Application

Cinnamon Tempest has exploited multiple unpatched vulnerabilities for initial access including vulnerabilities in Microsoft Exchange, Manage Engine AdSelfService Plus, Confluence, and Log4j.[1][7][5][4]

EnterpriseT1059.006PythonSub-technique

Cinnamon Tempest has used a customized version of the Impacket wmiexec.py module to create renamed output files.[1]

EnterpriseT1140Deobfuscate/Decode Files or Information

Cinnamon Tempest has used weaponized DLLs to load and decrypt payloads.[5]

EnterpriseT1021.002SMB/Windows Admin SharesSub-technique

Cinnamon Tempest has used SMBexec for lateral movement.[5]

EnterpriseT1572Protocol Tunneling

Cinnamon Tempest has used the Iox and NPS proxy and tunneling tools in combination create multiple connections through a single tunnel.[5]

EnterpriseT1080Taint Shared Content

Cinnamon Tempest has deployed ransomware from a batch file in a network share.[1]

EnterpriseT1543.003Windows ServiceSub-technique

Cinnamon Tempest has created system services to establish persistence for deployed tooling.[5]

EnterpriseT1059.001PowerShellSub-technique

Cinnamon Tempest has used PowerShell to communicate with C2, download files, and execute reconnaissance commands.[5]

EnterpriseT1059.003Windows Command ShellSub-technique

Cinnamon Tempest has executed ransomware using batch scripts deployed via GPO.[1]

Associated objects

Groups, software, and campaigns

ToolEnterprise

S0633: Sliver

Sliver is an open source, cross-platform, red team command and control (C2) framework written in Golang. Sliver includes its own package manager, "armory," for staging and downloading additional tools and payloads to the primary C2 framework.[1][2]

WindowsLinuxmacOS
ToolEnterprise

S0357: Impacket

Impacket is an open source collection of modules written in Python for programmatically constructing and manipulating network protocols. Impacket contains several tools for remote service execution, Kerberos manipulation, Windows credential dumping, packet sniffing, and relay attacks.[1]

LinuxmacOSWindows
MalwareEnterprise

S0154: Cobalt Strike

Cobalt Strike is a commercial, full-featured, remote access tool that bills itself as “adversary simulation software designed to execute targeted attacks and emulate the post-exploitation actions of advanced threat actors”. Cobalt Strike’s interactive post-exploit capabilities cover the full range of ATT&CK tactics, all executed within a single, integrated system.[1]

In addition to its own capabilities, Cobalt Strike leverages the capabilities of other well-known tools such as Metasploit and Mimikatz.[1]

LinuxmacOSWindows
ToolEnterprise

S1040: Rclone

Rclone is a command line program for syncing files with cloud storage services such as Dropbox, Google Drive, Amazon S3, and MEGA. Rclone has been used in a number of ransomware campaigns, including those associated with the Conti and DarkSide Ransomware-as-a-Service operations.[1][2][3][4][5]

LinuxWindowsmacOS
Relationship explorer

All related ATT&CK context

Change history

Object version and sync metadata

The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates.

ATT&CK release
19.1
Object version
1.0
Created
Modified
Raw hash
c8ebd5578d486ed4...
Imported snapshots across ATT&CK releases(1)
ReleaseBundle importedObject versionModifiedStatusRaw hash
19.11.0Current bundlec8ebd5578d48…
Raw source

Mirrored ATT&CK source object

The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.

Source references

External references and citations

MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.

  1. [1]
    Microsoft Ransomware as a Service

    Microsoft. (2022, May 9). Ransomware as a service: Understanding the cybercrime gig economy and how to protect yourself. Retrieved March 10, 2023.

    Open source URL
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    Microsoft Threat Actor Naming July 2023

    Microsoft . (2023, July 12). How Microsoft names threat actors. Retrieved November 17, 2023.

    Open source URL
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    Trend Micro Cheerscrypt May 2022

    Dela Cruz, A. et al. (2022, May 25). New Linux-Based Ransomware Cheerscrypt Targeting ESXi Devices Linked to Leaked Babuk Source Code. Retrieved December 19, 2023.

    Open source URL
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    SecureWorks BRONZE STARLIGHT Ransomware Operations June 2022

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    Sygnia Emperor Dragonfly October 2022

    Biderman, O. et al. (2022, October 3). REVEALING EMPEROR DRAGONFLY: NIGHT SKY AND CHEERSCRYPT - A SINGLE RANSOMWARE GROUP. Retrieved December 6, 2023.

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    Dell SecureWorks BRONZE STARLIGHT Profile

    SecureWorks. (n.d.). BRONZE STARLIGHT. Retrieved December 6, 2023.

    Open source URL
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    Microsoft Log4j Vulnerability Exploitation December 2021

    Microsoft Threat Intelligence. (2021, December 11). Guidance for preventing, detecting, and hunting for exploitation of the Log4j 2 vulnerability. Retrieved December 7, 2023.

    Open source URL
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    BRONZE STARLIGHT

    (Citation: Dell SecureWorks BRONZE STARLIGHT Profile)

  9. [9]
    BRONZE STARLIGHT

    (Citation: Dell SecureWorks BRONZE STARLIGHT Profile)

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    BRONZE STARLIGHT

    (Citation: Dell SecureWorks BRONZE STARLIGHT Profile)

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    DEV-0401

    (Citation: Microsoft Threat Actor Naming July 2023)

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    DEV-0401

    (Citation: Microsoft Threat Actor Naming July 2023)

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    DEV-0401

    (Citation: Microsoft Threat Actor Naming July 2023)

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    (Citation: Sygnia Emperor Dragonfly October 2022)

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    (Citation: Sygnia Emperor Dragonfly October 2022)

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    Emperor Dragonfly

    (Citation: Sygnia Emperor Dragonfly October 2022)

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    Microsoft Ransomware as a Service

    Microsoft. (2022, May 9). Ransomware as a service: Understanding the cybercrime gig economy and how to protect yourself. Retrieved March 10, 2023.

    Open source URL
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    Microsoft Threat Actor Naming July 2023

    Microsoft . (2023, July 12). How Microsoft names threat actors. Retrieved November 17, 2023.

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    Microsoft Threat Actor Naming July 2023

    Microsoft . (2023, July 12). How Microsoft names threat actors. Retrieved November 17, 2023.

    Open source URL
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    Open source URL
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    Open source URL
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    Sygnia Emperor Dragonfly October 2022

    Biderman, O. et al. (2022, October 3). REVEALING EMPEROR DRAGONFLY: NIGHT SKY AND CHEERSCRYPT - A SINGLE RANSOMWARE GROUP. Retrieved December 6, 2023.

    Open source URL
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    Biderman, O. et al. (2022, October 3). REVEALING EMPEROR DRAGONFLY: NIGHT SKY AND CHEERSCRYPT - A SINGLE RANSOMWARE GROUP. Retrieved December 6, 2023.

    Open source URL
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    Trend Micro Cheerscrypt May 2022

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    Open source URL
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    Trend Micro Cheerscrypt May 2022

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    Open source URL
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    Open source URL
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    Sygnia Emperor Dragonfly October 2022

    Biderman, O. et al. (2022, October 3). REVEALING EMPEROR DRAGONFLY: NIGHT SKY AND CHEERSCRYPT - A SINGLE RANSOMWARE GROUP. Retrieved December 6, 2023.

    Open source URL
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