From 18a4e468cedfe9d1abacc299fffa1137fab11f74 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Mon, 8 Feb 2021 22:22:16 +0100
Subject: [PATCH] [New Rule] Attempt to Unload Elastic Endpoint Security Kernel
 Extension (#807)

* [New Rule] Attempt to Unload Elastic Endpoint Security Kernel Extension

* Update rules/macos/defense_evasion_unload_endpointsecurity_kext.toml

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

* Update rules/macos/defense_evasion_unload_endpointsecurity_kext.toml

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

* Update rules/macos/defense_evasion_unload_endpointsecurity_kext.toml

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

* added subtechnique

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 ..._evasion_unload_endpointsecurity_kext.toml | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 rules/macos/defense_evasion_unload_endpointsecurity_kext.toml

diff --git a/rules/macos/defense_evasion_unload_endpointsecurity_kext.toml b/rules/macos/defense_evasion_unload_endpointsecurity_kext.toml
new file mode 100644
index 000000000..e36d1d443
--- /dev/null
+++ b/rules/macos/defense_evasion_unload_endpointsecurity_kext.toml
@@ -0,0 +1,43 @@
+[metadata]
+creation_date = "2020/01/05"
+maturity = "production"
+updated_date = "2020/01/05"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies attempts to unload the Elastic Endpoint Security kernel extension via the kextunload command.
+"""
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Attempt to Unload Elastic Endpoint Security Kernel Extension"
+risk_score = 73
+rule_id = "70fa1af4-27fd-4f26-bd03-50b6af6b9e24"
+severity = "high"
+tags = ["Elastic", "Host", "macOS", "Threat Detection", "Defense Evasion"]
+type = "query"
+
+query = '''
+event.category:process and event.type:(start or process_started) and
+ process.name:kextunload and process.args:("/System/Library/Extensions/EndpointSecurity.kext" or "EndpointSecurity.kext")
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1562"
+name = "Impair Defenses"
+reference = "https://attack.mitre.org/techniques/T1562/"
+[[rule.threat.technique.subtechnique]]
+id = "T1562.001"
+name = "Disable or Modify Tools"
+reference = "https://attack.mitre.org/techniques/T1562/001/"
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"