Detection rules › Sigma
Remote Access Tool - ScreenConnect Potential Suspicious Remote Command Execution
Detects potentially suspicious child processes launched via the ScreenConnect client service.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Command & Control | T1219.002 Remote Access Tools: Remote Desktop Software |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
Rule body yaml
title: Remote Access Tool - ScreenConnect Potential Suspicious Remote Command Execution
id: 7b582f1a-b318-4c6a-bf4e-66fe49bf55a5
related:
- id: d1a401ab-8c47-4e86-a7d8-2460b6a53e4a
type: derived
status: test
description: |
Detects potentially suspicious child processes launched via the ScreenConnect client service.
references:
- https://www.mandiant.com/resources/telegram-malware-iranian-espionage
- https://docs.connectwise.com/ConnectWise_Control_Documentation/Get_started/Host_client/View_menu/Backstage_mode
- https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708
- https://www.trendmicro.com/en_us/research/24/b/threat-actor-groups-including-black-basta-are-exploiting-recent-.html
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems), @Kostastsale
date: 2022-02-25
modified: 2024-02-28
tags:
- attack.command-and-control
- attack.t1219.002
logsource:
product: windows
category: process_creation
detection:
selection:
ParentCommandLine|contains|all:
- ':\Windows\TEMP\ScreenConnect\'
- 'run.cmd'
Image|endswith:
- '\bitsadmin.exe'
- '\cmd.exe'
- '\curl.exe'
- '\dllhost.exe'
- '\net.exe'
- '\nltest.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\rundll32.exe'
- '\wevtutil.exe'
condition: selection
falsepositives:
- If the script being executed make use of any of the utilities mentioned in the detection then they should filtered out or allowed.
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ParentCommandLine|contains|all:
- ':\Windows\TEMP\ScreenConnect\'
- 'run.cmd'
Image|endswith:
- '\bitsadmin.exe'
- '\cmd.exe'
- '\curl.exe'
- '\dllhost.exe'
- '\net.exe'
- '\nltest.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\rundll32.exe'
- '\wevtutil.exe'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Image | ends_with |
|
ParentCommandLine | match |
|