From 3f8a7573f78554320abce8eccc24a508d1e8106f Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Tue, 8 Dec 2020 11:31:03 +0100
Subject: [PATCH] [New Rule] Remotely Started Services (#542)

* [New Rule] Remotely Started Services

* added a common FP msiexec

* Update lateral_movement_remote_services.toml

* eql syntax

* Update rules/windows/lateral_movement_remote_services.toml

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>

* Update lateral_movement_remote_services.toml

* port numb

* ecs_version

* added RPC to alert name

* Update rules/windows/lateral_movement_remote_services.toml

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
---
 .../lateral_movement_remote_services.toml     | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 rules/windows/lateral_movement_remote_services.toml

diff --git a/rules/windows/lateral_movement_remote_services.toml b/rules/windows/lateral_movement_remote_services.toml
new file mode 100644
index 000000000..64cef67cf
--- /dev/null
+++ b/rules/windows/lateral_movement_remote_services.toml
@@ -0,0 +1,51 @@
+[metadata]
+creation_date = "2020/11/16"
+maturity = "production"
+updated_date = "2020/11/16"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies remote execution of Windows services over remote procedure call (RPC). This could be indicative of lateral
+movement, but will be noisy if commonly done by administrators."
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*", "winlogbeat-*"]
+language = "eql"
+license = "Elastic License"
+name = "Remotely Started Services via RPC"
+risk_score = 47
+rule_id = "aa9a274d-6b53-424d-ac5e-cb8ca4251650"
+severity = "medium"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Lateral Movement", "Execution"]
+type = "eql"
+
+query = '''
+sequence with maxspan=1s
+   [network where process.name : "services.exe" and
+      network.direction == "incoming" and network.transport == "tcp" and 
+      source.port >= 49152 and destination.port >= 49152 and source.address not in ("127.0.0.1", "::1")
+   ] by host.id, process.entity_id
+
+   [process where event.type in ("start", "process_started") and process.parent.name : "services.exe" and 
+       not (process.name : "svchost.exe" and process.args : "tiledatamodelsvc") and 
+       not (process.name : "msiexec.exe" and process.args : "/V")
+   
+    /* uncomment if psexec is noisy in your environment */
+    /* and not process.name : "PSEXESVC.exe" */
+   ] by host.id, process.parent.entity_id
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1035"
+name = "Service Execution"
+reference = "https://attack.mitre.org/techniques/T1035/"
+
+
+[rule.threat.tactic]
+id = "TA0008"
+name = "Lateral Movement"
+reference = "https://attack.mitre.org/tactics/TA0008/"