Jonhnathan
67 lines
2.1 KiB
TOML
67 lines
2.1 KiB
TOML
[metadata]
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creation_date = "2021/08/24"
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maturity = "production"
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updated_date = "2021/08/24"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies suspicious commands executed via a web server, which may suggest a vulnerability and remote shell access.
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"""
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false_positives = [
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"""
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Security audits, maintenance, and network administrative scripts may trigger this alert when run under web processes.
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""",
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]
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Webshell Detection: Script Process Child of Common Web Processes"
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note = """## Triage and analysis
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Detections should be investigated to identify if the activity corresponds to legitimate activity. As this rule detects post-exploitation process activity, investigations into this should be prioritized."""
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references = ["https://www.microsoft.com/security/blog/2020/02/04/ghost-in-the-shell-investigating-web-shell-attacks/"]
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risk_score = 73
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rule_id = "2917d495-59bd-4250-b395-c29409b76086"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Persistence"]
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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 event.type == "start" and
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process.parent.name : ("w3wp.exe", "httpd.exe", "nginx.exe", "php.exe", "php-cgi.exe", "tomcat.exe") and
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process.name : ("cmd.exe", "cscript.exe", "powershell.exe", "pwsh.exe", "wmic.exe", "wscript.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 = "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 = "T1505.003"
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name = "Web Shell"
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reference = "https://attack.mitre.org/techniques/T1505/003/"
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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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1190"
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name = "Exploit Public-Facing Application"
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reference = "https://attack.mitre.org/techniques/T1190/"
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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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