[New Rule] UAC Bypass via DiskCleanup Task Hijack (#160)

* [New Rule] UAC Bypass via DiskCleanup Task Hijack * Update privilege_escalation_uac_bypass_diskcleanup_hijack.toml * Update rules/windows/privilege_escalation_uac_bypass_diskcleanup_hijack.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/privilege_escalation_uac_bypass_diskcleanup_hijack.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/privilege_escalation_uac_bypass_diskcleanup_hijack.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 13:57:37 +02:00
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commit ff097719af
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+[metadata]
+creation_date = "2020/08/18"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/08/18"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies User Account Control (UAC) bypass via hijacking DiskCleanup Scheduled Task. Attackers bypass UAC to
+stealthily execute code with elevated permissions.
+"""
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "UAC Bypass via DiskCleanup Scheduled Task Hijack"
+risk_score = 47
+rule_id = "1dcc51f6-ba26-49e7-9ef4-2655abb2361e"
+severity = "medium"
+tags = ["Elastic", "Windows"]
+type = "query"
+
+query = '''
+event.category:process and event.type:(start or process_started) and
+  process.args:(/autoclean or /AUTOCLEAN) and
+  process.parent.name:svchost.exe and
+  not process.executable:("C:\Windows\System32\cleanmgr.exe" or "C:\Windows\SysWOW64\cleanmgr.exe")
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1088"
+name = "Bypass User Account Control"
+reference = "https://attack.mitre.org/techniques/T1088/"
+
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"