Ruben Groenewoud
7c5f17e30c
* [New Rules] user/group creation * Update rules/linux/persistence_linux_group_creation.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/linux/persistence_linux_user_account_creation.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/linux/persistence_linux_user_added_to_privileged_group.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * added backdoor user account * added host.os.type == linux for unit testing fix * unit testing fixes * Update rules/linux/persistence_linux_backdoor_user_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_linux_backdoor_user_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Added OSQuery to Investigation Guides * Update rules/linux/persistence_linux_backdoor_user_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_linux_backdoor_user_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * removed investigation guides to add in future PR * Fixed some issues with the rules * fixed typo * Update rules/linux/persistence_linux_backdoor_user_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_linux_user_account_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_linux_user_added_to_privileged_group.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_linux_group_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> --------- Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
55 lines
1.6 KiB
TOML
55 lines
1.6 KiB
TOML
[metadata]
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creation_date = "2023/02/13"
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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 = "2023/06/22"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies attempts to add a user to a privileged group. Attackers may add users to a privileged group in order to
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establish persistence on a 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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name = "Linux User Added to Privileged Group"
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risk_score = 47
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rule_id = "43d6ec12-2b1c-47b5-8f35-e9de65551d3b"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Persistence", "Elastic Endgame"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where host.os.type == "linux" and event.type == "start" and
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process.parent.name == "sudo" and
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process.args in ("root", "admin", "wheel", "staff", "sudo",
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"disk", "video", "shadow", "lxc", "lxd") and
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(
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process.name in ("usermod", "adduser") or
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process.name == "gpasswd" and
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process.args in ("-a", "--add", "-M", "--members")
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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 = "T1136"
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name = "Create Account"
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reference = "https://attack.mitre.org/techniques/T1136/"
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[[rule.threat.technique.subtechnique]]
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id = "T1136.001"
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name = "Local Account"
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reference = "https://attack.mitre.org/techniques/T1136/001/"
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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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