Elastic medium stable eql

Network Logon Provider Registry Modification

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.

View Source

Detection Logic

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"
    )
  )

False Positives

⚠ Authorized third party network logon providers.

Field Validations

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