NullSessionPipe Registry Modificationedit

Identifies NullSessionPipe registry modifications that specify which pipes can be accessed anonymously. This could be indicative of adversary lateral movement preparation by making the added pipe available to everyone.

Rule type: eql

Rule indices:


Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Lateral Movement

Version: 101 (version history)

Added (Elastic Stack release): 7.13.0

Last modified (Elastic Stack release): 8.6.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule queryedit

registry where event.type in ("creation", "change") and registry.path
: "HKLM\\SYSTEM\\*ControlSet*\\services\\LanmanServer\\Parameters\\Nul
lSessionPipes" and length( > 0

Threat mappingedit


Rule version historyedit

Version 101 (8.6.0 release)
  • Updated query, changed from:

    registry where registry.path : "HKLM\\SYSTEM\\*ControlSet*\\services\\
    LanmanServer\\Parameters\\NullSessionPipes" and
    != null
Version 100 (8.5.0 release)
  • Formatting only
Version 3 (8.4.0 release)
  • Formatting only
Version 2 (8.1.0 release)
  • Formatting only