Jonhnathan
f584fb6e31
* [Security Content] Adjust Mitre Att&ck Mappings - Windows Rules * Fix dates * Fix unit test errors * updated tags and fixed branch conflicts updated tags and fixed branch conflicts * description nit * Reverting unintended changes * Update initial_access_suspicious_ms_office_child_process.toml --------- Co-authored-by: imays11 <59296946+imays11@users.noreply.github.com>
107 lines
3.7 KiB
TOML
107 lines
3.7 KiB
TOML
[metadata]
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creation_date = "2021/07/14"
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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 = "2023/10/13"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies parent process spoofing used to thwart detection. Adversaries may spoof the parent process identifier (PPID)
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of a new process to evade process-monitoring defenses or to elevate privileges.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Parent Process PID Spoofing"
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references = ["https://blog.didierstevens.com/2017/03/20/"]
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risk_score = 73
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rule_id = "c88d4bd0-5649-4c52-87ea-9be59dbfbcf2"
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Tactic: Privilege Escalation", "Data Source: Elastic Defend"]
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type = "eql"
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query = '''
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/* This rule is compatible with Elastic Endpoint only */
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sequence by host.id, user.id with maxspan=3m
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[process where host.os.type == "windows" and event.type == "start" and
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process.Ext.token.integrity_level_name != "system" and
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(
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process.pe.original_file_name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe", "eqnedt32.exe",
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"fltldr.exe", "mspub.exe", "msaccess.exe", "powershell.exe", "pwsh.exe",
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"cscript.exe", "wscript.exe", "rundll32.exe", "regsvr32.exe", "msbuild.exe",
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"mshta.exe", "wmic.exe", "cmstp.exe", "msxsl.exe") or
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(process.executable : ("?:\\Users\\*.exe",
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"?:\\ProgramData\\*.exe",
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"?:\\Windows\\Temp\\*.exe",
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"?:\\Windows\\Tasks\\*") and
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(process.code_signature.exists == false or process.code_signature.status : "errorBadDigest")) or
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process.executable : "?:\\Windows\\Microsoft.NET\\*.exe"
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) and
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not process.executable :
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("?:\\Windows\\System32\\WerFaultSecure.exe",
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"?:\\WINDOWS\\SysWOW64\\WerFaultSecure.exe",
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"?:\\Windows\\System32\\WerFault.exe",
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"?:\\Windows\\SysWOW64\\WerFault.exe")
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] by process.pid
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[process where host.os.type == "windows" and event.type == "start" and
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process.parent.Ext.real.pid > 0 and
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/* process.parent.Ext.real.pid is only populated if the parent process pid doesn't match */
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not (process.name : "msedge.exe" and process.parent.name : "sihost.exe") and
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not process.executable :
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("?:\\Windows\\System32\\WerFaultSecure.exe",
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"?:\\WINDOWS\\SysWOW64\\WerFaultSecure.exe",
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"?:\\Windows\\System32\\WerFault.exe",
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"?:\\Windows\\SysWOW64\\WerFault.exe")
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] by process.parent.Ext.real.pid
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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 = "T1134"
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name = "Access Token Manipulation"
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reference = "https://attack.mitre.org/techniques/T1134/"
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[[rule.threat.technique.subtechnique]]
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id = "T1134.004"
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name = "Parent PID Spoofing"
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reference = "https://attack.mitre.org/techniques/T1134/004/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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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 = "T1134"
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name = "Access Token Manipulation"
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reference = "https://attack.mitre.org/techniques/T1134/"
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[[rule.threat.technique.subtechnique]]
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id = "T1134.004"
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name = "Parent PID Spoofing"
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reference = "https://attack.mitre.org/techniques/T1134/004/"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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