[New Rule] Creation or Modification of Root Certificate (#927)

* Create defense_evasion_create_mod_root_certificate.toml * update description * Update defense_evasion_create_mod_root_certificate.toml * spacing * Update rules/windows/defense_evasion_create_mod_root_certificate.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * removing process names that could lead to fn Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2021-02-08 10:01:59 -05:00
parent 0b568e5740
commit 02ee8195ab
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+[metadata]
+creation_date = "2021/02/01"
+maturity = "production"
+updated_date = "2021/02/01"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies the creation or modification of a local trusted root certificate in Windows. The install of a malicious root
+certificate would allow an attacker the ability to masquerade malicious files as valid signed components from any entity
+(e.g. Microsoft). It could also allow an attacker to decrypt SSL traffic.
+"""
+false_positives = ["Certain applications may install root certificates for the purpose of inspecting SSL traffic."]
+from = "now-9m"
+index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
+language = "eql"
+license = "Elastic License"
+name = "Creation or Modification of Root Certificate"
+references = [
+    "https://posts.specterops.io/code-signing-certificate-cloning-attacks-and-defenses-6f98657fc6ec",
+    "https://www.ired.team/offensive-security/persistence/t1130-install-root-certificate",
+]
+risk_score = 21
+rule_id = "203ab79b-239b-4aa5-8e54-fc50623ee8e4"
+severity = "low"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
+type = "eql"
+
+query = '''
+registry where event.type in ("creation", "change") and
+  registry.path :
+    (
+      "HKLM\\Software\\Microsoft\\SystemCertificates\\Root\\Certificates\\*\\Blob",
+      "HKLM\\Software\\Microsoft\\SystemCertificates\\AuthRoot\\Certificates\\*\\Blob",
+      "HKLM\\Software\\Policies\\Microsoft\\SystemCertificates\\Root\\Certificates\\*\\Blob",
+      "HKLM\\Software\\Policies\\Microsoft\\SystemCertificates\\AuthRoot\\Certificates\\*\\Blob"
+    )
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1553"
+name = "Subvert Trust Controls"
+reference = "https://attack.mitre.org/techniques/T1553/"
+[[rule.threat.technique.subtechnique]]
+id = "T1553.004"
+name = "Install Root Certificate"
+reference = "https://attack.mitre.org/techniques/T1553/004/"
+
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"