Suspicious Desktopimgdownldr Command

calendar Aug 12, 2024 · attack.command-and-control attack.t1105  ·
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Detects a suspicious Microsoft desktopimgdownldr execution with parameters used to download files from the Internet

Sigma rule (View on GitHub)

 1title: Suspicious Desktopimgdownldr Command
 2id: bb58aa4a-b80b-415a-a2c0-2f65a4c81009
 3status: test
 4description: Detects a suspicious Microsoft desktopimgdownldr execution with parameters used to download files from the Internet
 5references:
 6    - https://labs.sentinelone.com/living-off-windows-land-a-new-native-file-downldr/
 7    - https://twitter.com/SBousseaden/status/1278977301745741825
 8author: Florian Roth (Nextron Systems)
 9date: 2020-07-03
10modified: 2021-11-27
11tags:
12    - attack.command-and-control
13    - attack.t1105
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection1:
19        CommandLine|contains: ' /lockscreenurl:'
20    selection1_filter:
21        CommandLine|contains:
22            - '.jpg'
23            - '.jpeg'
24            - '.png'
25    selection_reg:
26        CommandLine|contains|all:
27            - 'reg delete'
28            - '\PersonalizationCSP'
29    condition: ( selection1 and not selection1_filter ) or selection_reg
30fields:
31    - CommandLine
32    - ParentCommandLine
33falsepositives:
34    - False positives depend on scripts and administrative tools used in the monitored environment
35level: high

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