[New Rule] Evasion via Renamed AutoIt Scripts Interpreter (#234)

* [New Rule] Evasion via Renamed AutoIt Scripts Interpreter * Update defense_evasion_masquerading_renamed_autoit.toml * Update defense_evasion_masquerading_renamed_autoit.toml * Update defense_evasion_masquerading_renamed_autoit.toml * Update defense_evasion_masquerading_renamed_autoit.toml * Update defense_evasion_masquerading_renamed_autoit.toml * Update rules/windows/defense_evasion_masquerading_renamed_autoit.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/defense_evasion_masquerading_renamed_autoit.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
2020-09-22 14:39:04 +02:00
parent 4948582d7c
commit c2e95a35dc
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+[metadata]
+creation_date = "2020/09/01"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/09/01"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies a suspicious AutoIt process execution. Malware written as AutoIt scripts tend to rename the AutoIt
+executable to avoid detection. 
+"""
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "lucene"
+license = "Elastic License"
+name = "Renamed AutoIt Scripts Interpreter"
+risk_score = 47
+rule_id = "2e1e835d-01e5-48ca-b9fc-7a61f7f11902"
+severity = "medium"
+tags = ["Elastic", "Windows"]
+type = "query"
+
+query = '''
+event.category:process AND event.type:(start OR process_started) AND
+  process.pe.original_file_name:/[aA][uU][tT][oO][iI][tT]\d\.[eE][xX][eE]/ AND
+  NOT process.name:/[aA][uU][tT][oO][iI][tT]\d{1,3}\.[eE][xX][eE]/
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1036"
+name = "Masquerading"
+reference = "https://attack.mitre.org/techniques/T1036/"
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"