title: Discovery of a System Time
author: E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
date: 2019/10/24
description: Identifies use of various commands to query a systems time. This technique
  may be used before executing a scheduled task or to discover the time zone of a
  target system.
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    Image:
    - '*\net.exe'
    - '*\net1.exe'
  SELECTION_3:
    CommandLine: '*time*'
  SELECTION_4:
    Image: '*\w32tm.exe'
  SELECTION_5:
    CommandLine: '*tz*'
  SELECTION_6:
    Image: '*\powershell.exe'
  SELECTION_7:
    CommandLine: '*Get-Date*'
  condition: (SELECTION_1 and ((SELECTION_2 and SELECTION_3) or (SELECTION_4 and SELECTION_5)
    or (SELECTION_6 and SELECTION_7)))
falsepositives:
- Legitimate use of the system utilities to discover system time for legitimate reason
id: b243b280-65fe-48df-ba07-6ddea7646427
level: low
logsource:
  category: process_creation
  product: windows
modified: 2019/11/11
references:
- https://eqllib.readthedocs.io/en/latest/analytics/fcdb99c2-ac3c-4bde-b664-4b336329bed2.html
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1124/T1124.md
status: experimental
tags:
- attack.discovery
- attack.t1124
ruletype: SIGMA