Cinnamon Tempest has used SMBexec for lateral movement.5
group
Cinnamon Tempest G1021
- Created
- 6 December 2023
- Last modified
- 31 July 2026
- Aliases
- Cinnamon Tempest · DEV-0401 · Emperor Dragonfly · BRONZE STARLIGHT
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]
19
Techniques52nd pct
11
Tactics66th pct
8
Tools & malwareTop 24%
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference G1021
Cinnamon Tempest has used Impacket for lateral movement via WMI.67
Cinnamon Tempest has used PowerShell to communicate with C2, download files, and execute reconnaissance commands.8
Cinnamon Tempest has executed ransomware using batch scripts deployed via GPO.9
Cinnamon Tempest has used a customized version of the Impacket wmiexec.py module to create renamed output files.10
Cinnamon Tempest has used compromised user accounts to deploy payloads and create system services.11
Standing G1021
Reach is how much of ATT&CK this group touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 176 ATT&CK groups only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
Techniques1952nd pct
52nd percentile · 52% of 176 ATT&CK groups have this many Enterprise techniques or fewer.
Tactics1166th pct
66th percentile · 66% of 176 ATT&CK groups have this many tactics spanned or fewer.
Tools & malware8Top 24%
76th percentile · 76% of 176 ATT&CK groups have this many tools and malware or fewer.
Campaigns089% tie · 4 values
89% of the population shares a single value across only 4 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique34medTop 17%
83rd percentile · 83% of 176 ATT&CK groups have this many detection rules per technique or fewer.
Tests / technique4med
Detection coverage G1021
1210 distinct rules cover the 19 techniques recorded for this group. The 1322 technique-to-rule mappings resolve to 1210 distinct rules, because one rule can cover several techniques. 859 Sigma · 351 Splunk.
17 covered by at least one rule2 with no coverage1210 distinct rules in total
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