From 326bebdebe84aa347f18457210d1e28d6212abd2 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Fri, 29 Jan 2021 19:06:49 +0100
Subject: [PATCH] [New Rule] Execution via Electron Child Process Node.js
 Module (#817)

* [New Rule] Execution via Electron ChildProc Node.js Module

* relinted

* fixed TID and adjusted KQL for perf

* fixed kql

* Update rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml

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

* Update rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml

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

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>
---
 ...vasion_electron_app_childproc_node_js.toml | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml

diff --git a/rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml b/rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml
new file mode 100644
index 000000000..f297aa6af
--- /dev/null
+++ b/rules/macos/execution_defense_evasion_electron_app_childproc_node_js.toml
@@ -0,0 +1,56 @@
+[metadata]
+creation_date = "2020/01/07"
+maturity = "production"
+updated_date = "2020/01/07"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies attempts to execute a child process from within the context of an Electron application using the
+child_process Node.js module. Adversaries may abuse this technique to inherit permissions from parent processes.
+"""
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Execution via Electron Child Process Node.js Module"
+references = [
+    "https://www.matthewslipper.com/2019/09/22/everything-you-wanted-electron-child-process.html",
+    "https://www.trustedsec.com/blog/macos-injection-via-third-party-frameworks/",
+    "https://nodejs.org/api/child_process.html",
+]
+risk_score = 47
+rule_id = "35330ba2-c859-4c98-8b7f-c19159ea0e58"
+severity = "medium"
+tags = ["Elastic", "Host", "macOS", "Threat Detection", "Defense Evasion", "Execution"]
+type = "query"
+
+query = '''
+event.category:process and event.type:(start or process_started) and process.args:("-e" and const*require*child_process*)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1059"
+name = "Command and Scripting Interpreter"
+reference = "https://attack.mitre.org/techniques/T1059/"
+
+
+[rule.threat.tactic]
+id = "TA0002"
+name = "Execution"
+reference = "https://attack.mitre.org/tactics/TA0002/"
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1548"
+name = "Abuse Elevation Control Mechanism"
+reference = "https://attack.mitre.org/techniques/T1548/"
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"