Malicious NotPetya Payload Execution via Rundll32 Ordinal Export from Windows Directory
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-07-01
- Updated
- 2026-08-28
ATT&CK techniques
ExecutionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects rundll32 launching a DLL from the Windows root directory by ordinal export number one which matches the NotPetya execution pattern documented by NCC Group. The ransomware was copied into the Windows folder and executed via its first ordinal to encrypt disks and spread laterally.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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