Justin Ibarra
46d5e37b76
* min_stack all rules to 8.3 * bump date Co-authored-by: Mika Ayenson <mika.ayenson@elastic.co>
63 lines
1.9 KiB
TOML
63 lines
1.9 KiB
TOML
[metadata]
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creation_date = "2020/12/21"
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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 = "2022/08/24"
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[rule]
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author = ["Elastic"]
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description = """
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Adversaries may modify SSH related binaries for persistence or credential access by patching sensitive functions to
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enable unauthorized access or by logging SSH credentials for exfiltration.
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"""
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false_positives = [
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"Trusted OpenSSH executable updates. It's recommended to verify the integrity of OpenSSH binary changes.",
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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 = "kuery"
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license = "Elastic License v2"
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name = "Modification of OpenSSH Binaries"
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references = ["https://blog.angelalonso.es/2016/09/anatomy-of-real-linux-intrusion-part-ii.html"]
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risk_score = 47
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rule_id = "0415f22a-2336-45fa-ba07-618a5942e22c"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Credential Access", "Persistence"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:file and event.type:change and
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process.name:* and
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(file.path:(/usr/sbin/sshd or /usr/bin/ssh or /usr/bin/sftp or /usr/bin/scp) or file.name:libkeyutils.so) and
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not process.name:("dpkg" or "yum" or "dnf" or "dnf-automatic")
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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 = "T1543"
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name = "Create or Modify System Process"
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reference = "https://attack.mitre.org/techniques/T1543/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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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 = "T1556"
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name = "Modify Authentication Process"
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reference = "https://attack.mitre.org/techniques/T1556/"
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[rule.threat.tactic]
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id = "TA0006"
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name = "Credential Access"
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reference = "https://attack.mitre.org/tactics/TA0006/"
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