Regsvr32 DLL Execution With Suspicious File Extension
Detects the execution of REGSVR32.exe with DLL files masquerading as other files
Detection logic
Detection requirements
- Platform
- Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source product
- windows
- Log source category
- process_creation
Known benign triggers
- Unlikely
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
References
| Reference | Cited by |
|---|---|
| blog.talosintelligence.com/2021/10/threat-hunting-in-large-datasets-by.html | 3 |
| guides.lib.umich.edu/c.php?g=282942&p=1885348 | Only this detection cites it |
| harfanglab.io/insidethelab/uac-0057-pressure-ukraine-poland/ | Only this detection cites it |
| thedfirreport.com/2021/11/29/continuing-the-bazar-ransomware-story/ | 3from 2 sources |
From the source
- At source
- Open at source
- Upstream identifier
- 089fc3d2-71e8-4763-a8a5-c97fbb0a403e
- Tagged by the source as
- attack.stealth
Licence
- Published under
- Detection Rule License 1.1Read the licence
- Attribution
- Required
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1