Remote Access Tool - ScreenConnect Potential Suspicious Remote Command Execution

Severity: medium
Author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems), @Kostastsale
Source: upstream

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 ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `selection`

or:
Image|endswith: '\bitsadmin.exe'
Image|endswith: '\cmd.exe'
Image|endswith: '\curl.exe'
Image|endswith: '\dllhost.exe'
Image|endswith: '\net.exe'
Image|endswith: '\nltest.exe'
Image|endswith: '\powershell.exe'
Image|endswith: '\pwsh.exe'
Image|endswith: '\rundll32.exe'
Image|endswith: '\wevtutil.exe'
ParentCommandLine|contains: ':\Windows\TEMP\ScreenConnect\'
ParentCommandLine|contains: run.cmd

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.