Ruben Groenewoud
9b2e74b220
* [Rule Tuning] [WIP] Linux DR
* Update defense_evasion_binary_copied_to_suspicious_directory.toml
* Fixed tag
* Added additional tuning
* unit test fix
* Additional tuning
* tuning
* added max signals
* Added max_signals=1 to brute force rules
* Cross-Platform Tuning
* Small fix
* new_terms conversion
* typo
* new_terms conversion
* Ransomware rule tuning
* performance tuning
* new_terms conversion for auditd_manager
* tune
* Need coffee
* kql/eql stuff
* formatting improvement
* new_terms sudo hijacking conversion
* exclusion
* Deprecations that were added last tuning
* Deprecations that were added last tuning
* Increased max timespan for brute force rules
* version bump
* added domain tag
* Two tunings
* More tuning
* Additional tuning
* updated_date bump
* query optimization
* Tuning
* Readded the exclusions for this one
* Changed int comparison
* Some tunings
* Update persistence_systemd_scheduled_timer_created.toml
* Update rules/linux/privilege_escalation_ld_preload_shared_object_modif.toml
Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
* [New Rule] Potential curl CVE-2023-38545 Exploitation
* Revert "[New Rule] Potential curl CVE-2023-38545 Exploitation"
This reverts commit 9c04d1b53d3d63678289f43ec0c7b617d26f1ce0.
* Update rules/cross-platform/command_and_control_non_standard_ssh_port.toml
* Update rules/linux/command_and_control_cat_network_activity.toml
* Update persistence_message_of_the_day_execution.toml
* Changed max_signals
* Revert "Merge branch 'main' into rule-tuning-ongoing-dr"
This reverts commit 1106b5d2eba1a3529eff325226d6baabfd4b0bf3, reversing
changes made to 5ff510757f25b0cb32e1ef18e9e2c34c8ec325a8.
* Revertable merge
* Update defense_evasion_ld_preload_env_variable_process_injection.toml
* File name change
---------
Co-authored-by: Isai <59296946+imays11@users.noreply.github.com>
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
(cherry picked from commit 020fff3aea)
75 lines
2.3 KiB
TOML
75 lines
2.3 KiB
TOML
[metadata]
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creation_date = "2023/05/17"
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integration = ["endpoint", "network_traffic"]
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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 = "2023/09/22"
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[rule]
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author = ["Elastic"]
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description = '''
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This rule identifies a potential network sweep. A network sweep is a method used by attackers to scan a target
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network, identifying active hosts, open ports, and available services to gather information on vulnerabilities and
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weaknesses. This reconnaissance helps them plan subsequent attacks and exploit potential entry points for unauthorized
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access, data theft, or other malicious activities. This rule proposes threshold logic to check for connection attempts
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from one source host to 10 or more destination hosts on commonly used network services.
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'''
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from = "now-9m"
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index = ["packetbeat-*", "auditbeat-*", "filebeat-*", "logs-network_traffic.*", "logs-endpoint.events.network-*",]
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language = "kuery"
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license = "Elastic License v2"
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max_signals = 5
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name = "Potential Network Sweep Detected"
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risk_score = 21
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rule_id = "781f8746-2180-4691-890c-4c96d11ca91d"
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severity = "low"
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tags = ["Domain: Network",
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"Tactic: Discovery",
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"Tactic: Reconnaissance",
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"Use Case: Network Security Monitoring"
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]
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type = "threshold"
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query = '''
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destination.port : (21 or 22 or 23 or 25 or 139 or 445 or 3389 or 5985 or 5986) and
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source.ip : (10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16)
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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 = "T1046"
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name = "Network Service Discovery"
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reference = "https://attack.mitre.org/techniques/T1046/"
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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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1595"
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name = "Active Scanning"
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reference = "https://attack.mitre.org/techniques/T1595/"
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[[rule.threat.technique.subtechnique]]
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id = "T1595.001"
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name = "Scanning IP Blocks"
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reference = "https://attack.mitre.org/techniques/T1595/001/"
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[rule.threat.tactic]
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id = "TA0043"
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name = "Reconnaissance"
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reference = "https://attack.mitre.org/tactics/TA0043/"
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[rule.threshold]
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field = ["source.ip"]
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value = 1
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[[rule.threshold.cardinality]]
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field = "destination.ip"
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value = 100
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