shashank-elastic
95 lines
2.6 KiB
TOML
95 lines
2.6 KiB
TOML
[metadata]
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creation_date = "2023/09/25"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2024/05/21"
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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Identifies child processes of frequently targeted Microsoft Office applications (Word, PowerPoint, Excel) with unusual
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process arguments and path. This behavior is often observed during exploitation of Office applications or from documents
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with malicious macros.
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"""
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from = "now-119m"
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index = ["logs-endpoint.events.process-*"]
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interval = "60m"
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Process Injection from Malicious Document"
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risk_score = 21
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rule_id = "1c5a04ae-d034-41bf-b0d8-96439b5cc774"
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Defense Evasion",
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"Tactic: Privilege Escalation",
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"Tactic: Initial Access",
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"Rule Type: BBR",
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"Data Source: Elastic Defend",
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]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where host.os.type == "windows" and event.action == "start" and
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process.parent.name : ("excel.exe", "powerpnt.exe", "winword.exe") and
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process.args_count == 1 and
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process.executable : (
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"?:\\Windows\\SysWOW64\\*.exe", "?:\\Windows\\system32\\*.exe"
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) and
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not (process.executable : "?:\\Windows\\System32\\spool\\drivers\\x64\\*" and
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process.code_signature.trusted == true and not process.code_signature.subject_name : "Microsoft *") and
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not process.executable : (
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"?:\\Windows\\Sys*\\Taskmgr.exe",
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"?:\\Windows\\Sys*\\ctfmon.exe",
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"?:\\Windows\\System32\\notepad.exe")
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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 = "T1055"
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name = "Process Injection"
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reference = "https://attack.mitre.org/techniques/T1055/"
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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 = "T1055"
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name = "Process Injection"
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reference = "https://attack.mitre.org/techniques/T1055/"
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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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1566"
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name = "Phishing"
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reference = "https://attack.mitre.org/techniques/T1566/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.001"
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name = "Spearphishing Attachment"
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reference = "https://attack.mitre.org/techniques/T1566/001/"
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[rule.threat.tactic]
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id = "TA0001"
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name = "Initial Access"
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reference = "https://attack.mitre.org/tactics/TA0001/"
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