[Rule Tuning] Scheduled Task Activity via pwsh (#3534)

(cherry picked from commit 760b99b)

Author: Aegrah

rules/windows/execution_scheduled_task_powershell_source.toml

@@ -4,7 +4,7 @@ integration = ["endpoint", "windows"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2024/03/08"
+updated_date = "2024/03/26"
 
 [rule]
 author = ["Elastic"]
@@ -24,40 +24,47 @@ references = [
 risk_score = 47
 rule_id = "5cd55388-a19c-47c7-8ec4-f41656c2fded"
 severity = "medium"
-tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Defend", "Data Source: Sysmon"]
+tags = [
+        "Domain: Endpoint",
+        "OS: Windows",
+        "Use Case: Threat Detection",
+        "Tactic: Execution",
+        "Data Source: Elastic Defend",
+        "Data Source: Sysmon"
+        ]
 type = "eql"
 
 query = '''
 sequence by host.id, process.entity_id with maxspan = 5s
  [any where host.os.type == "windows" and (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
   (?dll.name : "taskschd.dll" or file.name : "taskschd.dll") and process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe")]
- [network where host.os.type == "windows" and process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and destination.port == 135 and not destination.ip in ("127.0.0.1", "::1")]
+ [network where host.os.type == "windows" and process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and destination.port == 135 and not destination.address in ("127.0.0.1", "::1")]
 '''
 
-
 [[rule.threat]]
 framework = "MITRE ATT&CK"
+
 [[rule.threat.technique]]
 id = "T1053"
 name = "Scheduled Task/Job"
 reference = "https://attack.mitre.org/techniques/T1053/"
+
 [[rule.threat.technique.subtechnique]]
 id = "T1053.005"
 name = "Scheduled Task"
 reference = "https://attack.mitre.org/techniques/T1053/005/"
+
 [[rule.threat.technique]]
 id = "T1059"
 name = "Command and Scripting Interpreter"
 reference = "https://attack.mitre.org/techniques/T1059/"
+
 [[rule.threat.technique.subtechnique]]
 id = "T1059.001"
 name = "PowerShell"
 reference = "https://attack.mitre.org/techniques/T1059/001/"
 
-
-
 [rule.threat.tactic]
 id = "TA0002"
 name = "Execution"
 reference = "https://attack.mitre.org/tactics/TA0002/"
-