From cccd91bc1a1f5fb4c8df579607f614020d3c5616 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Tue, 29 Sep 2020 18:53:05 +0200
Subject: [PATCH] [New Rule] - Persistence via Update Orchestrator Service
 Hijack (#152)

* [New Rule] - Persistence via Update Orchestrator Service Hijack

* Update persistence_via_update_orchestrator_service_hijack.toml

* Update rules/windows/persistence_via_update_orchestrator_service_hijack.toml

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

* Update rules/windows/persistence_via_update_orchestrator_service_hijack.toml

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

* Update rules/windows/persistence_via_update_orchestrator_service_hijack.toml

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

* Update rules/windows/persistence_via_update_orchestrator_service_hijack.toml

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

* Update rules/windows/persistence_via_update_orchestrator_service_hijack.toml

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

Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 ...ia_update_orchestrator_service_hijack.toml | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 rules/windows/persistence_via_update_orchestrator_service_hijack.toml

diff --git a/rules/windows/persistence_via_update_orchestrator_service_hijack.toml b/rules/windows/persistence_via_update_orchestrator_service_hijack.toml
new file mode 100644
index 000000000..6c3dc345f
--- /dev/null
+++ b/rules/windows/persistence_via_update_orchestrator_service_hijack.toml
@@ -0,0 +1,44 @@
+[metadata]
+creation_date = "2020/08/17"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/08/17"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies potential hijacking of the Microsoft Update Orchestrator Service to establish persistence with an integrity level of
+SYSTEM.
+"""
+from = "now-9m"
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Persistence via Update Orchestrator Service Hijack"
+references = ["https://github.com/irsl/CVE-2020-1313"]
+risk_score = 73
+rule_id = "265db8f5-fc73-4d0d-b434-6483b56372e2"
+severity = "high"
+tags = ["Elastic", "Windows"]
+type = "query"
+
+query = '''
+event.category:process and event.type:(start or process_started) and
+  process.parent.name:svchost.exe and
+  process.parent.args:(UsoSvc or usosvc) and
+  not process.name:(UsoClient.exe or usoclient.exe or MusNotification.exe or musnotification.exe or MusNotificationUx.exe or musnotificationux.exe)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1050"
+name = "New Service"
+reference = "https://attack.mitre.org/techniques/T1050/"
+
+
+[rule.threat.tactic]
+id = "TA0003"
+name = "Persistence"
+reference = "https://attack.mitre.org/tactics/TA0003/"