From fb3267992196a9877a2c98055f48f683247f74cd Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Mon, 8 Feb 2021 23:02:02 +0100
Subject: [PATCH] [New Rule] Access to SystemKey via Hexdump (#815)

* [New Rule] Access to SystemKey via Hexdump

* Update rules/macos/credential_access_systemkey_dumping.toml

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

* Update rules/macos/credential_access_systemkey_dumping.toml

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

* Update rules/macos/credential_access_systemkey_dumping.toml

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

* Update credential_access_systemkey_dumping.toml

* relinted

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 .../credential_access_systemkey_dumping.toml  | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 rules/macos/credential_access_systemkey_dumping.toml

diff --git a/rules/macos/credential_access_systemkey_dumping.toml b/rules/macos/credential_access_systemkey_dumping.toml
new file mode 100644
index 000000000..70c7a8d3e
--- /dev/null
+++ b/rules/macos/credential_access_systemkey_dumping.toml
@@ -0,0 +1,48 @@
+[metadata]
+creation_date = "2020/01/07"
+maturity = "production"
+updated_date = "2020/01/07"
+
+[rule]
+author = ["Elastic"]
+description = """
+Keychains are the built-in way for macOS to keep track of users' passwords and credentials for many services and
+features, including Wi-Fi and website passwords, secure notes, certificates, and Kerberos. Adversaries may collect the
+keychain storage data from a system to acquire credentials.
+"""
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "SystemKey Access via Hexdump"
+references = ["https://github.com/AlessandroZ/LaZagne/blob/master/Mac/lazagne/softwares/system/chainbreaker.py"]
+risk_score = 73
+rule_id = "d75991f2-b989-419d-b797-ac1e54ec2d61"
+severity = "high"
+tags = ["Elastic", "Host", "macOS", "Threat Detection", "Credential Access"]
+type = "query"
+
+query = '''
+event.category:process and event.type:(start or process_started) and
+  process.name:hexdump and process.args:"/private/var/db/SystemKey"
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1555"
+name = "Credentials from Password Stores"
+reference = "https://attack.mitre.org/techniques/T1555/"
+[[rule.threat.technique.subtechnique]]
+id = "T1555.001"
+name = "Keychain"
+reference = "https://attack.mitre.org/techniques/T1555/001/"
+
+
+
+[rule.threat.tactic]
+id = "TA0006"
+name = "Credential Access"
+reference = "https://attack.mitre.org/tactics/TA0006/"
+