Justin Ibarra
97ee8cc9ac
* Refresh beats and ecs schemas and default to use latest to validate * remove incorrect ecs_version from zoom rule * remove stale ecs_version from rules
53 lines
1.6 KiB
TOML
53 lines
1.6 KiB
TOML
[metadata]
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creation_date = "2020/04/23"
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maturity = "production"
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updated_date = "2020/11/03"
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[rule]
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author = ["Elastic"]
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description = """
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Telnet provides a command line interface for communication with a remote device or server. This rule identifies Telnet
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network connections to publicly routable IP addresses.
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"""
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false_positives = [
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"""
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Telnet can be used for both benign or malicious purposes. Telnet is included by default in some Linux distributions,
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so its presence is not inherently suspicious. The use of Telnet to manage devices remotely has declined in recent
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years in favor of more secure protocols such as SSH. Telnet usage by non-automated tools or frameworks may be
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suspicious.
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""",
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]
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from = "now-9m"
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index = ["auditbeat-*", "logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License"
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name = "Connection to External Network via Telnet"
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risk_score = 47
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rule_id = "e19e64ee-130e-4c07-961f-8a339f0b8362"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Lateral Movement"]
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type = "eql"
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query = '''
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sequence by process.entity_id
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[process where process.name == "telnet" and event.type == "start"]
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[network where process.name == "telnet" and
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not cidrmatch(destination.ip, "127.0.0.0/8", "10.0.0.0/8", "172.16.0.0/12",
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"192.168.0.0/16", "FE80::/10", "::1/128")]
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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 = "T1021"
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name = "Remote Services"
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reference = "https://attack.mitre.org/techniques/T1021/"
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[rule.threat.tactic]
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id = "TA0008"
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name = "Lateral Movement"
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reference = "https://attack.mitre.org/tactics/TA0008/"
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