45 lines
1.3 KiB
TOML
45 lines
1.3 KiB
TOML
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[metadata]
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creation_date = "2022/02/24"
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maturity = "production"
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updated_date = "2022/02/24"
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[rule]
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author = ["Elastic"]
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description = "Identifies Linux binary env abuse to break out from restricted environments by spawning an interactive system shell"
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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 env Shell Evasion"
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references = ["https://gtfobins.github.io/gtfobins/env/"]
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risk_score = 47
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rule_id = "72d33577-f155-457d-aad3-379f9b750c97"
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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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process where event.type == "start" and process.name : "env" and process.args_count == 2 and process.args : ("/bin/sh", "/bin/bash", "sh", "bash")
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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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