Sigma rule: DLL Load via LSASS

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-5d820fc37df6, updated 2022-04-21T00:00:00.000Z.

Rule

Title
DLL Load via LSASS
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2019-10-16
Modified
2022-04-21
File
rules/windows/registry/registry_event/registry_event_susp_lsass_dll_load.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a method to load DLL via LSASS process using an undocumented Registry key

Log source

product
windows
category
registry_event

Detection

selection:
    TargetObject|contains:
        - '\CurrentControlSet\Services\NTDS\DirectoryServiceExtPt'
        - '\CurrentControlSet\Services\NTDS\LsaDbExtPt'
filter_domain_controller:
    Image: 'C:\Windows\system32\lsass.exe'
    Details:
        - '%%systemroot%%\system32\ntdsa.dll'
        - '%%systemroot%%\system32\lsadb.dll'
condition: selection and not 1 of filter_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.execution
  • attack.persistence
  • attack.t1547.008

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_event/registry_event_susp_lsass_dll_load.yml

Sources and licences

  • SigmaHQ

    "DLL Load via LSASS" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_event/registry_event_susp_lsass_dll_load.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: DLL Load via LSASS",
entity page, dataset version ref-5d820fc37df6, updated 2022-04-21T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b3503044-60ce-4bf4-bbcb-e3db98788823 (accessed 2026-11-03).
Underlying source: SigmaHQ rule b3503044-60ce-4bf4-bbcb-e3db98788823, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.