From 75ed0f8f920139e80075cce2bc15cbdac8e85e57 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Wed, 18 Nov 2020 20:34:10 +0100
Subject: [PATCH] [New Rule] UAC Bypass via ICMLuaUtil Elevated COM interface
 (#383)

* [New Rule] Bypass UAC via ICMLuaUtil Elevated COM interface

* added tags

* Update privilege_escalation_uac_bypass_com_interface_icmluautil.toml

* adjusted args to avoid leading wildcard

* Update rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>

* Update rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>

* Update rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>

* replaced wildcard with In

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>
Co-authored-by: Ross Wolf <31489089+rw-access@users.noreply.github.com>
---
 ...n_uac_bypass_com_interface_icmluautil.toml | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml

diff --git a/rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml b/rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml
new file mode 100644
index 000000000..856d4989e
--- /dev/null
+++ b/rules/windows/privilege_escalation_uac_bypass_com_interface_icmluautil.toml
@@ -0,0 +1,43 @@
+[metadata]
+creation_date = "2020/10/19"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/10/19"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies User Account Control (UAC) bypass attempts via the ICMLuaUtil Elevated COM interface. Attackers may attempt
+to bypass UAC to stealthily execute code with elevated permissions.
+"""
+from = "now-9m"
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License"
+name = "UAC Bypass via ICMLuaUtil Elevated COM Interface"
+risk_score = 73
+rule_id = "68d56fdc-7ffa-4419-8e95-81641bd6f845"
+severity = "high"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Privilege Escalation"]
+type = "eql"
+
+query = '''
+process where event.type in ("start", "process_started") and
+ process.parent.name == "dllhost.exe" and
+ process.parent.args in ("/Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}", "/Processid:{D2E7041B-2927-42FB-8E9F-7CE93B6DC937}") and
+ process.pe.original_file_name != "WerFault.exe"
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1088"
+name = "Bypass User Account Control"
+reference = "https://attack.mitre.org/techniques/T1088/"
+
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"