Potential Persistence Attempt Via Run Keys Using Reg.EXE

Severity: medium
Author: Florian Roth (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems)
Source: upstream

Detects suspicious command line reg.exe tool adding key to RUN key in Registry

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1547.001` Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder
Privilege Escalation	`T1547.001` Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `selection`

or:
CommandLine|contains: 'Software\Microsoft\Windows\CurrentVersion\Run'
CommandLine|contains: '\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run'
CommandLine|contains: '\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run'
CommandLine|contains: ' add '
CommandLine|contains: reg
Image|endswith: '\reg.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.