Elastic Security Detection Rules

Network Logon Provider Registry Modification

Last updated 9 months ago on 2025-03-20
Created 5 years ago on 2021-03-18

About

Identifies the modification of the network logon provider registry. Adversaries may register a rogue network logon provider module for persistence and/or credential access via intercepting the authentication credentials in clear text during user logon.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: PersistenceTactic: Credential AccessData Source: Elastic EndgameData Source: Elastic DefendData Source: SysmonData Source: Microsoft Defender for EndpointLanguage: eql
Severity
medium
Risk Score
47
MITRE ATT&CK™

Credential Access (TA0006)(external, opens in a new tab or window)

↳ Modify Authentication Process (T1556)(external, opens in a new tab or window)

Persistence (TA0003)(external, opens in a new tab or window)

↳ Create or Modify System Process (T1543)(external, opens in a new tab or window)

False Positive Examples
Authorized third party network logon providers.
License
Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.registry-*endgame-*logs-windows.sysmon_operational-*winlogbeat-*logs-m365_defender.event-*
Related Integrations

endpoint(external, opens in a new tab or window)

m365_defender(external, opens in a new tab or window)

windows(external, opens in a new tab or window)

Query
text code block:
registry where host.os.type == "windows" and event.type == "change" and
  registry.data.strings : "?*" and registry.value : "ProviderPath" and
  registry.path : (
    "HKLM\\SYSTEM\\*ControlSet*\\Services\\*\\NetworkProvider\\ProviderPath",
    "\\REGISTRY\\MACHINE\\SYSTEM\\*ControlSet*\\Services\\*\\NetworkProvider\\ProviderPath"
  ) and
  /* Excluding default NetworkProviders RDPNP, LanmanWorkstation and webclient. */
  not (
    user.id : "S-1-5-18" and
    registry.data.strings : (
        "%SystemRoot%\\System32\\ntlanman.dll",
        "%SystemRoot%\\System32\\drprov.dll",
        "%SystemRoot%\\System32\\davclnt.dll",
        "%SystemRoot%\\System32\\vmhgfs.dll",
        "?:\\Program Files (x86)\\Citrix\\ICA Client\\x64\\pnsson.dll",
        "?:\\Program Files\\Dell\\SARemediation\\agent\\DellMgmtNP.dll",
        "?:\\Program Files (x86)\\CheckPoint\\Endpoint Connect\\\\epcgina.dll"
    )
  )

Install detection rules in Elastic Security

Detect Network Logon Provider Registry Modification in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).