System Time Discovery

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: 110

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

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&CK^TM

Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
Technique:
- Name: System Time Discovery
- ID: T1124
- Reference URL: https://attack.mitre.org/techniques/T1124/

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