sigmamediumHunting

Rundll32 InstallScreenSaver Execution

An attacker may execute an application as a SCR File using rundll32.exe desk.cpl,InstallScreenSaver

MITRE ATT&CK

defense-evasion

Detection Query

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

Author

Christopher Peacock @securepeacock, SCYTHE @scythe_io, TactiKoolSec

Created

2022-04-28

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.t1218.011attack.defense-evasion

Raw Content

title: Rundll32 InstallScreenSaver Execution
id: 15bd98ea-55f4-4d37-b09a-e7caa0fa2221
status: test
description: An attacker may execute an application as a SCR File using rundll32.exe desk.cpl,InstallScreenSaver
references:
    - https://lolbas-project.github.io/lolbas/Libraries/Desk/
    - https://github.com/redcanaryco/atomic-red-team/blob/0f229c0e42bfe7ca736a14023836d65baa941ed2/atomics/T1218.011/T1218.011.md#atomic-test-13---rundll32-with-deskcpl
author: 'Christopher Peacock @securepeacock, SCYTHE @scythe_io, TactiKoolSec'
date: 2022-04-28
modified: 2023-02-09
tags:
    - attack.t1218.011
    - attack.defense-evasion
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\rundll32.exe'
        - OriginalFileName: 'RUNDLL32.EXE'
    selection_cli:
        CommandLine|contains: 'InstallScreenSaver'
    condition: all of selection_*
falsepositives:
    - Legitimate installation of a new screensaver
level: medium