Suspicious Key Manager Access

Description

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

Query · sigma

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

Known false positives

  • Administrative activity
Raw source Suspicious Key Manager Access · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Suspicious Key Manager Access
id: a4694263-59a8-4608-a3a0-6f8d3a51664c
status: test
description: Detects the invocation of the Stored User Names and Passwords dialogue (Key Manager)
references:
    - https://twitter.com/NinjaParanoid/status/1516442028963659777
author: Florian Roth (Nextron Systems)
date: 2022-04-21
modified: 2023-02-09
tags:
    - attack.credential-access
    - attack.t1555.004
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\rundll32.exe'
        - OriginalFileName: 'RUNDLL32.EXE'
    selection_cli:
        CommandLine|contains|all:
            - 'keymgr'
            - 'KRShowKeyMgr'
    condition: all of selection_*
falsepositives:
    - Administrative activity
level: high

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