Detection rules › Sigma

Remote Access Tool - ScreenConnect Command Execution

Status
test
Severity
low
Log source
product windows, service application
Author
Ali Alwashali
Source
github.com/SigmaHQ/sigma

Detects command execution via ScreenConnect RMM

Known false positives

  • Legitimate use of ScreenConnect

MITRE ATT&CK coverage

Telemetry coverage

Rule body

title: Remote Access Tool - ScreenConnect Command Execution
id: 076ebe48-cc05-4d8f-9d41-89245cd93a14
related:
    - id: b1f73849-6329-4069-bc8f-78a604bb8b23
      type: similar
status: test
description: Detects command execution via ScreenConnect RMM
references:
    - https://www.huntandhackett.com/blog/revil-the-usage-of-legitimate-remote-admin-tooling
    - https://github.com/SigmaHQ/sigma/pull/4467
author: Ali Alwashali
date: 2023-10-10
tags:
    - attack.execution
    - attack.t1059.003
logsource:
    service: application
    product: windows
detection:
    selection:
        Provider_Name: 'ScreenConnect'
        EventID: 200
        Data|contains: 'Executed command of length'
    condition: selection
falsepositives:
    - Legitimate use of ScreenConnect
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Provider_Name: 'ScreenConnect'
    EventID: 200
    Data|contains: 'Executed command of length'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Datamatch
  • Executed command of length
field:"Data" kind:match value:"Executed command of length"
Provider_Nameeq
  • ScreenConnect corpus 2 (sigma 2)
field:"Provider_Name" kind:eq value:"ScreenConnect"