Sigma rule: Suspicious Key Manager Access

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b5b8d0a404bd, updated 2023-02-09T00:00:00.000Z.

Rule

Title
Suspicious Key Manager Access
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022-04-21
Modified
2023-02-09
File
rules/windows/process_creation/proc_creation_win_rundll32_keymgr.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the invocation of the Stored User Names and Passwords dialogue (Key Manager)

Log source

product
windows
category
process_creation

Detection

selection_img:
    - Image|endswith: '\rundll32.exe'
    - OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
    CommandLine|contains|all:
        - 'keymgr'
        - 'KRShowKeyMgr'
condition: all of selection_*

False positives (as the rule lists them)

  • Administrative activity

Tags

  • attack.credential-access
  • attack.t1555.004

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/process_creation/proc_creation_win_rundll32_keymgr.yml

Sources and licences

  • SigmaHQ

    "Suspicious Key Manager Access" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_rundll32_keymgr.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: Suspicious Key Manager Access",
entity page, dataset version ref-b5b8d0a404bd, updated 2023-02-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/a4694263-59a8-4608-a3a0-6f8d3a51664c (accessed 2026-11-03).
Underlying source: SigmaHQ rule a4694263-59a8-4608-a3a0-6f8d3a51664c, 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.