Ruben Groenewoud
5a80423003
* [BBR Promotion] Linux BBR --> DR Promotion * [BBR Promotion] Linux BBR --> DR Promotion --------- Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
115 lines
4.2 KiB
TOML
115 lines
4.2 KiB
TOML
[metadata]
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creation_date = "2023/07/25"
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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 = "2024/02/22"
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integration = ["endpoint"]
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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 potential edit of a suspicious file. In Linux, when editing a file through an editor, a
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temporary .swp file is created. By monitoring for the creation of this .swp file, we can detect potential file edits of
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suspicious files. The execution of this rule is not a clear sign of the file being edited, as just opening the file
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through an editor will trigger this event. Attackers may alter any of the files added in this rule to establish
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persistence, escalate privileges or perform reconnaisance on the system.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "endgame-*"]
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language = "eql"
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license = "Elastic License v2"
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max_signals = 1
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name = "Potential Suspicious File Edit"
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risk_score = 21
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rule_id = "3728c08d-9b70-456b-b6b8-007c7d246128"
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Linux",
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"Use Case: Threat Detection",
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"Tactic: Persistence",
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"Tactic: Privilege Escalation",
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"Data Source: Elastic Endgame",
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"Data Source: Elastic Defend"
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]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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file where event.action in ("creation", "file_create_event") and file.extension == "swp" and
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file.path : (
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/* common interesting files and locations */
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"/etc/.shadow.swp", "/etc/.shadow-.swp", "/etc/.shadow~.swp", "/etc/.gshadow.swp", "/etc/.gshadow-.swp",
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"/etc/.passwd.swp", "/etc/.pwd.db.swp", "/etc/.master.passwd.swp", "/etc/.spwd.db.swp", "/etc/security/.opasswd.swp",
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"/etc/.environment.swp", "/etc/.profile.swp", "/etc/sudoers.d/.*.swp", "/etc/ld.so.conf.d/.*.swp",
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"/etc/init.d/.*.swp", "/etc/.rc.local.swp", "/etc/rc*.d/.*.swp", "/dev/shm/.*.swp", "/etc/update-motd.d/.*.swp",
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"/usr/lib/update-notifier/.*.swp",
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/* service, timer, want, socket and lock files */
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"/etc/systemd/system/.*.swp", "/usr/local/lib/systemd/system/.*.swp", "/lib/systemd/system/.*.swp",
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"/usr/lib/systemd/system/.*.swp","/home/*/.config/systemd/user/.*.swp", "/run/.*.swp", "/var/run/.*.swp/",
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/* profile and shell configuration files */
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"/home/*.profile.swp", "/home/*.bash_profile.swp", "/home/*.bash_login.swp", "/home/*.bashrc.swp", "/home/*.bash_logout.swp",
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"/home/*.zshrc.swp", "/home/*.zlogin.swp", "/home/*.tcshrc.swp", "/home/*.kshrc.swp", "/home/*.config.fish.swp",
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"/root/*.profile.swp", "/root/*.bash_profile.swp", "/root/*.bash_login.swp", "/root/*.bashrc.swp", "/root/*.bash_logout.swp",
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"/root/*.zshrc.swp", "/root/*.zlogin.swp", "/root/*.tcshrc.swp", "/root/*.kshrc.swp", "/root/*.config.fish.swp"
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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.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.technique]]
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id = "T1037"
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name = "Boot or Logon Initialization Scripts"
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reference = "https://attack.mitre.org/techniques/T1037/"
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[[rule.threat.technique.subtechnique]]
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id = "T1037.004"
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name = "RC Scripts"
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reference = "https://attack.mitre.org/techniques/T1037/004/"
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[[rule.threat.technique]]
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id = "T1574"
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name = "Hijack Execution Flow"
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reference = "https://attack.mitre.org/techniques/T1574/"
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[[rule.threat.technique.subtechnique]]
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id = "T1574.006"
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name = "Dynamic Linker Hijacking"
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reference = "https://attack.mitre.org/techniques/T1574/006/"
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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.technique.subtechnique]]
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id = "T1543.002"
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name = "Systemd Service"
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reference = "https://attack.mitre.org/techniques/T1543/002/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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[[rule.threat.technique]]
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id = "T1548"
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name = "Abuse Elevation Control Mechanism"
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reference = "https://attack.mitre.org/techniques/T1548/"
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[[rule.threat.technique.subtechnique]]
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id = "T1548.003"
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name = "Sudo and Sudo Caching"
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reference = "https://attack.mitre.org/techniques/T1548/003/"
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