Remote Access Tool - ScreenConnect Remote Command Execution — Sigma Rule

Rule metadata and linked tags

Author: Ali Alwashali. Source status: test; severity: low. Source dates: 2023-10-10 / 2024-02-26.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: c3bb61765ff013e164a387919ed25fed306c6bc9efb5435f6575cb97b32a5ac7

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

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

Original YAML and metadata in JSON

False positives

• Legitimate use of ScreenConnect. Disable this rule if ScreenConnect is heavily used.

Source references

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