Ross Wolf
5fcece8416
Co-Authored-By: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-Authored-By: Craig Chamberlain <randomuserid@users.noreply.github.com> Co-Authored-By: David French <56409778+threat-punter@users.noreply.github.com> Co-Authored-By: Derek Ditch <dcode@users.noreply.github.com> Co-Authored-By: Justin Ibarra <brokensound77@users.noreply.github.com>
49 lines
1.5 KiB
TOML
49 lines
1.5 KiB
TOML
[metadata]
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creation_date = "2020/04/23"
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ecs_version = ["1.4.0"]
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maturity = "production"
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updated_date = "2020/04/23"
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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 non-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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index = ["auditbeat-*"]
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language = "kuery"
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license = "Elastic License"
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name = "Connection to Internal Network via Telnet"
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risk_score = 47
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rule_id = "1b21abcc-4d9f-4b08-a7f5-316f5f94b973"
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severity = "medium"
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tags = ["Elastic", "Linux"]
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type = "query"
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query = '''
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event.action:("connected-to" or "network_flow") and process.name:telnet and destination.ip:((10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16 or "FE80::/10") and not (127.0.0.0/8 or "::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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