Remote Access Tool - ScreenConnect Execution

Hunt Hypothesis

An adversary may use legitimate desktop support and remote access software, such as Team Viewer, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target

Detection Rule

Sigma (Original)

title: Remote Access Tool - ScreenConnect Execution
id: 57bff678-25d1-4d6c-8211-8ca106d12053
status: test
description: |
    An adversary may use legitimate desktop support and remote access software, such as Team Viewer, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target systems within networks.
    These services are commonly used as legitimate technical support software, and may be allowed by application control within a target environment.
    Remote access tools like VNC, Ammyy, and Teamviewer are used frequently when compared with other legitimate software commonly used by adversaries. (Citation: Symantec Living off the Land)
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1219/T1219.md#atomic-test-5---screenconnect-application-download-and-install-on-windows
author: frack113
date: 2022-02-13
modified: 2023-03-05
tags:
    - attack.command-and-control
    - attack.t1219.002
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Description: 'ScreenConnect Service'
        - Product: 'ScreenConnect'
        - Company: 'ScreenConnect Software'
    condition: selection
falsepositives:
    - Legitimate usage of the tool
level: medium

KQL (Azure Sentinel)

imProcessCreate
| where TargetProcessFileDescription =~ "ScreenConnect Service" or TargetProcessFileProduct =~ "ScreenConnect" or TargetProcessFileCompany =~ "ScreenConnect Software"

Required Data Sources

False Positive Guidance

• Legitimate usage of the tool

MITRE ATT&CK Context

• Tactic: Command and Control
• Technique: T1219.002 — T1219.002

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1219/T1219.md#atomic-test-5---screenconnect-application-download-and-install-on-windows
• SigmaHQ Rule