Detectionmediumtest
Potential DLL File Download Via PowerShell Invoke-WebRequest
Detects potential DLL files being downloaded using the PowerShell Invoke-WebRequest or Invoke-RestMethod cmdlets.
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Launch
Florian Roth (Nextron Systems), Hieu TranCreated Mon Mar 13Updated Fri Jul 180f0450f3-8b47-441e-a31b-15a91dc243e2windows
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:
CommandLine|contains:
- 'Invoke-RestMethod '
- 'Invoke-WebRequest '
- 'IRM '
- 'IWR '
CommandLine|contains|all:
- 'http'
- 'OutFile'
- '.dll'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Techniques
Sub-techniques
Rule Metadata
Rule ID
0f0450f3-8b47-441e-a31b-15a91dc243e2
Status
test
Level
medium
Type
Detection
Created
Mon Mar 13
Modified
Fri Jul 18
Path
rules/windows/process_creation/proc_creation_win_powershell_download_dll.yml
Raw Tags
attack.command-and-controlattack.executionattack.t1059.001attack.t1105