From e3ff45e20c5bd6dc0310735e017f7fafaa79f00e Mon Sep 17 00:00:00 2001
From: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
Date: Wed, 18 Jan 2023 13:01:57 +0100
Subject: [PATCH] [New Rule] System Time Discovery (#2475)

* [New Rule] System Time Discovery

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>

* Update rules/windows/discovery_system_time_discovery.toml

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>

Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
---
 .../discovery_system_time_discovery.toml      | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 rules/windows/discovery_system_time_discovery.toml

diff --git a/rules/windows/discovery_system_time_discovery.toml b/rules/windows/discovery_system_time_discovery.toml
new file mode 100644
index 000000000..489d5f95a
--- /dev/null
+++ b/rules/windows/discovery_system_time_discovery.toml
@@ -0,0 +1,45 @@
+[metadata]
+creation_date = "2023/01/17"
+integration = ["windows", "endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: required_fields, related_integrations, setup"
+min_stack_version = "8.3.0"
+updated_date = "2023/01/17"
+
+[rule]
+author = ["Elastic"]
+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 = ["Elastic", "Host", "Windows", "Threat Detection", "Discovery", "Elastic Endgame"]
+timestamp_override = "event.ingested"
+type = "eql"
+
+query = '''
+process where 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")
+)
+'''
+
+[[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/"