Justin Ibarra
6bdfddac8e
* Expand timestamp_override tests * removed timestamp_override from eql sequence rules * add config entry for eql rules with beats index and t_o * add timestamp_override to missing fields
52 lines
1.7 KiB
TOML
52 lines
1.7 KiB
TOML
[metadata]
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creation_date = "2022/03/09"
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maturity = "production"
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updated_date = "2022/03/31"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies Linux binary gcc abuse to break out from restricted environments by spawning an interactive system shell.The
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gcc utility is a complier system for various languages and mainly used to complie C and C++ programs and the activity of
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spawning shell is not a standard use of this binary for a user or system administrator.It indicates a potentially
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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 gcc command"
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references = ["https://gtfobins.github.io/gtfobins/gcc/"]
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risk_score = 47
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rule_id = "da986d2c-ffbf-4fd6-af96-a88dbf68f386"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Execution", "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 in ("sh", "dash", "bash") and
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process.parent.name == "gcc" and process.parent.args == "-wrapper" and
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process.parent.args in ("sh,-s", "bash,-s", "dash,-s", "/bin/sh,-s", "/bin/bash,-s", "/bin/dash,-s")
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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 = "T1059"
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name = "Command and Scripting Interpreter"
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reference = "https://attack.mitre.org/techniques/T1059/"
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[[rule.threat.technique.subtechnique]]
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id = "T1059.004"
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name = "Unix Shell"
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reference = "https://attack.mitre.org/techniques/T1059/004/"
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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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