Ruben Groenewoud
52 lines
1.7 KiB
TOML
52 lines
1.7 KiB
TOML
[metadata]
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creation_date = "2023/08/30"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/08/30"
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[rule]
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author = ["Elastic"]
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description = """
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This rule monitors for the usage of the which command with an unusual amount of process arguments. Attackers may leverage
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the which command to enumerate the system for useful installed utilities that may be used after compromising a system to
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escalate privileges or move latteraly across the network.
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"""
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from = "now-119m"
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interval = "60m"
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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 = "Suspicious which Enumeration"
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risk_score = 21
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rule_id = "5b18eef4-842c-4b47-970f-f08d24004bde"
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Discovery", "Data Source: Elastic Defend", "Rule Type: BBR"]
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timestamp_override = "event.ingested"
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type = "eql"
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building_block_type = "default"
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query = '''
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process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
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process.name == "which" and process.args_count >= 10
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/* potential tuning if rule would turn out to be noisy
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and process.args in ("nmap", "nc", "ncat", "netcat", nc.traditional", "gcc", "g++", "socat") and
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process.parent.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")
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*/
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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 = "T1082"
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name = "System Information Discovery"
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reference = "https://attack.mitre.org/techniques/T1082/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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