shashank-elastic
51 lines
1.7 KiB
TOML
51 lines
1.7 KiB
TOML
[metadata]
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creation_date = "2022/03/10"
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maturity = "production"
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updated_date = "2022/03/10"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies Linux binary ssh abuse to break out from restricted environments by spawning an interactive system shell.This
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activity is not standard use with this binary for a user or system administrator and could potentially indicate
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malicious actor attempting to improve the capabilities or stability of their access.
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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 = "Linux Restricted Shell Breakout via the ssh command"
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references = ["https://gtfobins.github.io/gtfobins/ssh/"]
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risk_score = 47
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rule_id = "97da359b-2b61-4a40-b2e4-8fc48cf7a294"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Defense Evasion", "GTFOBins"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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sequence by host.id, process.pid with maxspan=1m
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[process where process.name == "ssh" and process.args == "-o" and process.args : ("ProxyCommand=;sh*", "ProxyCommand=;bash*", "ProxyCommand=;dash*", "ProxyCommand=;/bin/sh*", "ProxyCommand=;/bin/bash*", "ProxyCommand=;/bin/dash*")]
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[process where process.parent.name == "ssh" and process.name : ("bash", "sh", "dash")]
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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 = "T1548"
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name = "Abuse Elevation Control Mechanism"
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reference = "https://attack.mitre.org/techniques/T1548/"
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[[rule.threat.technique.subtechnique]]
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id = "T1548.004"
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name = "Elevated Execution with Prompt"
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reference = "https://attack.mitre.org/techniques/T1548/004/"
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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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