discovery_system_time_discovery.toml

[metadata]
creation_date = "2023/01/24"
integration = ["windows", "endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/21"
bypass_bbr_timing = true

[rule]
author = ["Elastic"]
building_block_type = "default"
description = """
Detects the usage of commonly used system time discovery techniques, which attackers may use during the reconnaissance
phase after compromising a system. 
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "System Time Discovery"
risk_score = 21
rule_id = "06568a02-af29-4f20-929c-f3af281e41aa"
severity = "low"
tags = ["Domain: Endpoint",
        "OS: Windows",
        "Use Case: Threat Detection",
        "Tactic: Discovery",
        "Data Source: Elastic Defend",
        "Data Source: Elastic Endgame",
        "Rule Type: BBR"
        ]
timestamp_override = "event.ingested"
type = "eql"

query = '''
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") 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")
'''

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1124"
name = "System Time Discovery"
reference = "https://attack.mitre.org/techniques/T1124/"

[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"