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Remote File Download Via Desktopimgdownldr Utility

Detects the desktopimgdownldr utility being used to download a remote file. An adversary may use desktopimgdownldr to download arbitrary files as an alternative to certutil.

MITRE ATT&CK

T1105
command-and-control

Detection Query

selection:
  Image|endswith: \desktopimgdownldr.exe
  ParentImage|endswith: \desktopimgdownldr.exe
  CommandLine|contains: /lockscreenurl:http
condition: selection

Author

Tim Rauch, Elastic (idea)

Created

2022-09-27

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.command-and-controlattack.t1105
Raw Content
title: Remote File Download Via Desktopimgdownldr Utility
id: 214641c2-c579-4ecb-8427-0cf19df6842e
status: test
description: Detects the desktopimgdownldr utility being used to download a remote file. An adversary may use desktopimgdownldr to download arbitrary files as an alternative to certutil.
references:
    - https://www.elastic.co/guide/en/security/current/remote-file-download-via-desktopimgdownldr-utility.html
author: Tim Rauch, Elastic (idea)
date: 2022-09-27
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\desktopimgdownldr.exe'
        ParentImage|endswith: '\desktopimgdownldr.exe'
        CommandLine|contains: '/lockscreenurl:http'
    condition: selection
falsepositives:
    - Unknown
level: medium