Remote File Download Via Desktopimgdownldr Utility

calendar Aug 12, 2024 · attack.command-and-control attack.t1105  ·
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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.

Sigma rule (View on GitHub)

 1title: Remote File Download Via Desktopimgdownldr Utility
 2id: 214641c2-c579-4ecb-8427-0cf19df6842e
 3status: test
 4description: 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.
 5references:
 6    - https://www.elastic.co/guide/en/security/current/remote-file-download-via-desktopimgdownldr-utility.html
 7author: Tim Rauch, Elastic (idea)
 8date: 2022-09-27
 9tags:
10    - attack.command-and-control
11    - attack.t1105
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        Image|endswith: '\desktopimgdownldr.exe'
18        ParentImage|endswith: '\desktopimgdownldr.exe'
19        CommandLine|contains: '/lockscreenurl:http'
20    condition: selection
21falsepositives:
22    - Unknown
23level: medium

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