Detectionhightest

Remote Access Tool - ScreenConnect Server Web Shell Execution

Detects potential web shell execution from the ScreenConnect server process.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch
Jason Rathbun (Blackpoint Cyber)Created Mon Feb 26b19146a3-25d4-41b4-928b-1e2a92641b1bwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic
Detection Logic1 selector
detection:
    selection:
        ParentImage|endswith: '\ScreenConnect.Service.exe'
        Image|endswith:
            - '\cmd.exe'
            - '\csc.exe'
    condition: selection
False Positives
Unlikely

False positives are unlikely for most environments. High confidence detection.

Rule Metadata
Rule ID
b19146a3-25d4-41b4-928b-1e2a92641b1b
Status
test
Level
high
Type
Detection
Created
Mon Feb 26
Path
rules/windows/process_creation/proc_creation_win_remote_access_tools_screenconnect_webshell.yml
Raw Tags
attack.initial-accessattack.t1190
View on GitHub