Detectionmediumtest
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.
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Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
Image|endswith: '\desktopimgdownldr.exe'
ParentImage|endswith: '\desktopimgdownldr.exe'
CommandLine|contains: '/lockscreenurl:http'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
214641c2-c579-4ecb-8427-0cf19df6842e
Status
test
Level
medium
Type
Detection
Created
Tue Sep 27
Author
Path
rules/windows/process_creation/proc_creation_win_desktopimgdownldr_remote_file_download.yml
Raw Tags
attack.command-and-controlattack.t1105