sigmalowHunting

Remote Access Tool - ScreenConnect Remote Command Execution

Detects the execution of a system command via the ScreenConnect RMM service.

MITRE ATT&CK

execution

Detection Query

selection_parent:
  ParentImage|endswith: \ScreenConnect.ClientService.exe
selection_img:
  - Image|endswith: \cmd.exe
  - OriginalFileName: Cmd.Exe
selection_cli:
  CommandLine|contains: \TEMP\ScreenConnect\
condition: all of selection_*

Author

Ali Alwashali

Created

2023-10-10

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://github.com/SigmaHQ/sigma/pull/4467

Tags

attack.executionattack.t1059.003

Raw Content

title: Remote Access Tool - ScreenConnect Remote Command Execution
id: b1f73849-6329-4069-bc8f-78a604bb8b23
status: test
description: Detects the execution of a system command via the ScreenConnect RMM service.
references:
    - https://github.com/SigmaHQ/sigma/pull/4467
author: Ali Alwashali
date: 2023-10-10
modified: 2024-02-26
tags:
    - attack.execution
    - attack.t1059.003
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|endswith: '\ScreenConnect.ClientService.exe'
    selection_img:
        - Image|endswith: '\cmd.exe'
        - OriginalFileName: 'Cmd.Exe'
    selection_cli:
        # Example:
        #   CommandLine: "cmd.exe" /c "C:\Windows\TEMP\ScreenConnect\23.6.8.8644\3c41d689-bbf5-4216-b2f4-ba8fd6192c25run.cmd"
        CommandLine|contains: '\TEMP\ScreenConnect\'
    condition: all of selection_*
falsepositives:
    - Legitimate use of ScreenConnect. Disable this rule if ScreenConnect is heavily used.
# Note: Increase the level if you don't leverage ScreenConnect
level: low