[New Rule] Encoded Executable Stored in the Registry (#636)

* [New Rule] Encoded Executable Stored in the Registry * eql syntax * ecs_version * Update rules/windows/defense_evasion_hide_encoded_executable_registry.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * Update rules/windows/defense_evasion_hide_encoded_executable_registry.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
2020-12-08 20:51:14 +01:00
parent 19e0de3bed
commit afb00d7097
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+[metadata]
+creation_date = "2020/11/25"
+maturity = "production"
+updated_date = "2020/11/25"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies registry write modifications to hide an encoded portable executable. This could be indicative of adversary
+defense evasion by avoiding the storing of malicious content directly on disk.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*", "winlogbeat-*"]
+language = "eql"
+license = "Elastic License"
+name = "Encoded Executable Stored in the Registry"
+risk_score = 47
+rule_id = "93c1ce76-494c-4f01-8167-35edfb52f7b1"
+severity = "medium"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
+type = "eql"
+
+query = '''
+registry where
+/* update here with encoding combinations */
+ registry.data.strings : "TVqQAAMAAAAEAAAA*"
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1140"
+name = "Deobfuscate/Decode Files or Information"
+reference = "https://attack.mitre.org/techniques/T1140/"
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"