Jonhnathan
d21d94a8f8
* [Rule Tuning] Windows BBR Rule Tuning - 3
* Update non-ecs-schema.json
* Update rules_building_block/execution_settingcontent_ms_file_creation.toml
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
* Update persistence_startup_folder_lnk.toml
---------
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
(cherry picked from commit c5addae009)
103 lines
3.4 KiB
TOML
103 lines
3.4 KiB
TOML
[metadata]
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creation_date = "2023/08/25"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2024/04/05"
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bypass_bbr_timing = true
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[rule]
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author = ["Elastic"]
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description = """
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Identifies unusual process executions using MSSQL Service accounts, which can indicate the exploitation/compromise of SQL
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instances. Attackers may exploit exposed MSSQL instances for initial access or lateral movement.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.process-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Unusual Process For MSSQL Service Accounts"
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references = [
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"https://www.microsoft.com/en-us/security/blog/2023/08/24/flax-typhoon-using-legitimate-software-to-quietly-access-taiwanese-organizations/",
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"https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/configure-windows-service-accounts-and-permissions?view=sql-server-ver16"
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]
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risk_score = 21
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rule_id = "e74d645b-fec6-431e-bf93-ca64a538e0de"
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Lateral Movement", "Tactic: Persistence", "Data Source: Elastic Defend", "Rule Type: BBR"]
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timestamp_override = "event.ingested"
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type = "eql"
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building_block_type = "default"
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query = '''
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process where event.type == "start" and host.os.type == "windows" and
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user.name : (
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"SQLSERVERAGENT", "SQLAGENT$*",
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"MSSQLSERVER", "MSSQL$*",
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"MSSQLServerOLAPService",
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"ReportServer*", "MsDtsServer150",
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"MSSQLFDLauncher*",
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"SQLServer2005SQLBrowserUser$*",
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"SQLWriter", "winmgmt"
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) and user.domain : "NT SERVICE" and
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not (
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(
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process.name : (
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"sqlceip.exe", "sqlservr.exe", "sqlagent.exe",
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"msmdsrv.exe", "ReportingServicesService.exe",
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"MsDtsSrvr.exe", "sqlbrowser.exe", "DTExec.exe",
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"SQLPS.exe", "fdhost.exe", "fdlauncher.exe",
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"SqlDumper.exe", "sqlsqm.exe", "DatabaseMail.exe",
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"ISServerExec.exe", "Microsoft.ReportingServices.Portal.WebHost.exe",
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"bcp.exe", "SQLCMD.exe", "DatabaseMail.exe"
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) or
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process.executable : (
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"?:\\Windows\\System32\\wermgr.exe",
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"?:\\Windows\\System32\\conhost.exe",
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"?:\\Windows\\System32\\WerFault.exe"
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)
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) and
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(
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process.code_signature.subject_name : ("Microsoft Corporation", "Microsoft Windows") and
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process.code_signature.trusted == true
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)
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) and
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not (
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(process.name : "cmd.exe" and process.parent.name : "sqlservr.exe") or
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(process.name : "cmd.exe" and process.parent.name : "forfiles.exe" and process.command_line : "/c echo *")
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)
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1210"
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name = "Exploitation of Remote Services"
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reference = "https://attack.mitre.org/techniques/T1210/"
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[rule.threat.tactic]
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id = "TA0008"
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name = "Lateral Movement"
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reference = "https://attack.mitre.org/tactics/TA0008/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1505"
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name = "Server Software Component"
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reference = "https://attack.mitre.org/techniques/T1505/"
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[[rule.threat.technique.subtechnique]]
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id = "T1505.001"
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name = "SQL Stored Procedures"
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reference = "https://attack.mitre.org/techniques/T1505/001/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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