↳ GitHub sourceAnalytics ruleMedium
Midnight Blizzard - suspicious rundll32.exe execution of vbscript (Normalized Process Events)
Description
'This query idenifies when rundll32.exe executes a specific set of inline VBScript commands
References: https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'
- Rule type
- Scheduled
- Version
- 1.1.6
- Query frequency
- 1d
- Query period
- 1d
- Trigger
- gt 0
Declared MITRE coverage
KQL query
Original query, unchanged.
imProcessCreate
| where Process hassuffix 'rundll32.exe'
| where CommandLine has_any ('Execute','RegRead','window.close')
| project TimeGenerated, Dvc, User, Process, CommandLine, ActingProcessName, EventVendor, EventProduct
| extend AccountName = tostring(split(User, @'\')[1]), AccountNTDomain = tostring(split(User, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex
Declared entities
Source provenance
GitHubDisplayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.
- Commit
9800e51↗- Source identifier
bdf04f58-242b-4729-b376-577c4bdf5d3a
Additional source files 1
Detections/ASimProcess/imProcess_MidnightBlizzard_SuspiciousRundll32Exec.yamlsource ↗GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC