Ruben Groenewoud
4cdf52129a
* [Tuning] Win DR Tuning for UEBA * Need to get used to Windows formatting * Added additional content * Updated min stack * Added additional tuning * Fixed unit testing for KQL optimization * Update rules_building_block/discovery_internet_capabilities.toml * Additional tuning * Kuery optimization * Additional tuning * Additional tuning * Additional tuning * Additional tuning * Unit testing optimization fix * optimization * tuning * Optimization * Update rules/windows/discovery_privileged_localgroup_membership.toml * Added feedback * Update rules/windows/discovery_privileged_localgroup_membership.toml Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com> * Update rules/windows/discovery_remote_system_discovery_commands_windows.toml Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com> * Update rules/windows/discovery_system_service_discovery.toml Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com> * added host.id as additional new_terms field * Reworked a lot. * kibana.alert.rule.rule_id to non-ecs-schema.json * Fixed index by adding a dot * fixed typo * Added host.os.type:windows for signals * Added additional tag * Added Higher-Order Rule tag * Stripped down signal rules down to two * revert * Update rules/windows/discovery_admin_recon.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> * Update rules/windows/discovery_enumerating_domain_trusts_via_nltest.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> * Update rules_building_block/discovery_generic_registry_query.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> * Update rules_building_block/discovery_system_time_discovery.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> * Update rules/windows/discovery_privileged_localgroup_membership.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> * Update discovery_generic_registry_query.toml * Readded exclusions * Added trailing wildcards for KQL * Update discovery_privileged_localgroup_membership.toml * Update rules_building_block/discovery_signal_unusual_user_host.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/windows/discovery_signal_unusual_discovery_signal_proc_cmdline.toml Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com> * Formatting fix --------- Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com> Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
69 lines
2.0 KiB
TOML
69 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2023/07/14"
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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 = "2023/09/21"
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bypass_bbr_timing = true
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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This rule identifies the execution of commands that can be used to enumerate network connections. Adversaries may
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attempt to get a listing of network connections to or from a compromised system to identify targets within an environment.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Windows System Network Connections Discovery"
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risk_score = 21
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rule_id = "c4e9ed3e-55a2-4309-a012-bc3c78dad10a"
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severity = "low"
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tags = ["Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Discovery",
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"Rule Type: BBR",
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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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process where event.type == "start" and
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(
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process.name : "netstat.exe" or
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(
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(
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(process.name : "net.exe" or process.pe.original_file_name == "net.exe") or
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(
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(process.name : "net1.exe" or process.pe.original_file_name == "net1.exe") and
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not process.parent.name : "net.exe"
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)
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) and process.args : ("use", "user", "session", "config") and not process.args: ("/persistent:*", "/delete", "\\\\*")
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) or
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(process.name : "nbtstat.exe" and process.args : "-s*")
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) and not user.id : "S-1-5-18"
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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 = "T1049"
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name = "System Network Connections Discovery"
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reference = "https://attack.mitre.org/techniques/T1049/"
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[[rule.threat.technique]]
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id = "T1082"
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name = "System Information Discovery"
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reference = "https://attack.mitre.org/techniques/T1082/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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