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Elastic Docs ›Elastic Security Solution [8.13] ›Detections and alerts ›Prebuilt rule reference

System Time Discovery

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System Time Discovery

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Detects the usage of commonly used system time discovery techniques, which attackers may use during the reconnaissance phase after compromising a system.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.process-*
  • logs-windows.*
  • endgame-*
  • logs-system.security*

Severity: low

Risk score: 21

Runs every: 5m

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

Maximum alerts per execution: 100

References: None

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Discovery
  • Data Source: Elastic Defend
  • Data Source: Elastic Endgame
  • Rule Type: BBR
  • Data Source: System

Version: 10

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "windows" and event.type == "start" and
(
 (
    (process.name: "net.exe" or (process.name : "net1.exe" and not process.parent.name : "net.exe")) and
    process.args : "time" and not process.args : "/set"
 ) or
 (process.name: "w32tm.exe" and process.args: "/tz") or
 (process.name: "tzutil.exe" and process.args: "/g")
) and not user.id : ("S-1-5-18", "S-1-5-19", "S-1-5-20")

Framework: MITRE ATT&CKTM

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