Suspicious RunOnce Parent Process

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent
ATT&CK Tactic	Persistence (TA0003)
ATT&CK Technique	Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder (T1547.001)
Severity	Low

Description

Runonce.exe executes commands under the Registry key HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce, typically on computer boot and user login events.

Attacker's Goals

An attacker is trying to perform an action on the system at a later point, achieving persistence.

Investigative actions

Investigate the endpoint to determine if it's a legitimate process that is supposed to use RunOnce in its operation.