Samirbous
14fe63bb1e
* [Rule Tuning] Unusual Parent-Child Relationship and Suspicious MS Office Child Process * replaced path with name for faster comparaison * added few more cases and refurl also organized items per anomaly category * added extra refurl plus few excep * Update execution_suspicious_ms_office_child_process.toml * added parenthesis * excluded an FP
50 lines
2.1 KiB
TOML
50 lines
2.1 KiB
TOML
[metadata]
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creation_date = "2020/02/18"
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maturity = "production"
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updated_date = "2020/12/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies suspicious child processes of frequently targeted Microsoft Office applications (Word, PowerPoint, Excel).
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These child processes are often launched during exploitation of Office applications or from documents with malicious
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macros.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License"
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name = "Suspicious MS Office Child Process"
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risk_score = 47
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rule_id = "a624863f-a70d-417f-a7d2-7a404638d47f"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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type = "eql"
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query = '''
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process where event.type in ("start", "process_started") and
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process.parent.name : ("eqnedt32.exe", "excel.exe", "fltldr.exe", "msaccess.exe", "mspub.exe", "powerpnt.exe", "winword.exe") and
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process.name : ("Microsoft.Workflow.Compiler.exe", "arp.exe", "atbroker.exe", "bginfo.exe", "bitsadmin.exe", "cdb.exe", "certutil.exe",
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"cmd.exe", "cmstp.exe", "cscript.exe", "csi.exe", "dnx.exe", "dsget.exe", "dsquery.exe", "forfiles.exe", "fsi.exe",
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"ftp.exe", "gpresult.exe", "hostname.exe", "ieexec.exe", "iexpress.exe", "installutil.exe", "ipconfig.exe", "mshta.exe",
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"msxsl.exe", "nbtstat.exe", "net.exe", "net1.exe", "netsh.exe", "netstat.exe", "nltest.exe", "odbcconf.exe", "ping.exe",
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"powershell.exe", "pwsh.exe", "qprocess.exe", "quser.exe", "qwinsta.exe", "rcsi.exe", "reg.exe", "regasm.exe", "regsvcs.exe",
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"regsvr32.exe", "sc.exe", "schtasks.exe", "systeminfo.exe", "tasklist.exe", "tracert.exe", "whoami.exe",
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"wmic.exe", "wscript.exe", "xwizard.exe", "explorer.exe", "rundll32.exe", "hh.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 = "T1193"
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name = "Spearphishing Attachment"
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reference = "https://attack.mitre.org/techniques/T1193/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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