Terrance DeJesus
2b22d066fd
* add beats compatability to NPC rules
* added filebeat compatibility to 'Accepted Default Telnet Port Connection'
* added filebeat compatibility to 'Cobalt Strike Command and Control Beacon'
* added filebeat compatibility to 'Default Cobalt Strike Team Server Certificate'
* added filebeat compatibility to 'Roshal Archive (RAR) or PowerShell File Downloaded from the Internet'
* added filebeat compatibility to 'Possible FIN7 DGA Command and Control Behavior'
* added filebeat compatibility to 'Halfbaked Command and Control Beacon'
* added filebeat compatibility to 'IPSEC NAT Traversal Port Activity'
* added filebeat compatibility to 'SMTP on Port 26/TCP'
* added filebeat compatibility to 'RDP (Remote Desktop Protocol) from the Internet'
* added filebeat compatibility to 'VNC (Virtual Network Computing) from the Internet'
* added filebeat compatibility to 'VNC (Virtual Network Computing) to the Internet'
* added filebeat compatibility to 'RPC (Remote Procedure Call) from the Internet'
* added filebeat compatibility to 'RPC (Remote Procedure Call) to the Internet'
* added filebeat compatibility to 'SMB (Windows File Sharing) Activity to the Internet'
* removed extra space in query
* added filebeat compatibility to 'Inbound Connection to an Unsecure Elasticsearch Node'
* added filebeat compatibility to 'Abnormally Large DNS Response'
* fixed missing ending parenthesis
* added auditbeat to compatible rules
* addressed feedback
* removed filebeat and auditbeat due to incompatibility
* Update rules/network/command_and_control_cobalt_strike_beacon.toml
* Update rules/network/command_and_control_accepted_default_telnet_port_connection.toml
Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com>
---------
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com>
(cherry picked from commit b8ae2218f8)
71 lines
2.3 KiB
TOML
71 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 = "2023/07/31"
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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 port scan. A port scan is a method utilized by attackers to systematically scan a
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target system or network for open ports, allowing them to identify available services and potential vulnerabilities.
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By mapping out the open ports, attackers can gather critical information to plan and execute targeted attacks, gaining
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unauthorized access, compromising security, and potentially leading to data breaches, unauthorized control, or further
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exploitation of the targeted system or network. This rule proposes threshold logic to check for connection attempts
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from one source host to 20 or more destination ports.
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'''
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from = "now-9m"
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index = ["logs-endpoint.events.network-*", "logs-network_traffic.*", "packetbeat-*", "filebeat-*", "auditbeat-*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Potential Network Scan Detected"
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risk_score = 21
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rule_id = "0171f283-ade7-4f87-9521-ac346c68cc9b"
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severity = "low"
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tags = ["Domain: Network", "Tactic: Discovery", "Tactic: Reconnaissance", "Use Case: Network Security Monitoring"]
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type = "threshold"
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query = '''
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destination.port : * and event.action : "network_flow" and 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 = ["destination.ip", "source.ip"]
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value = 1
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[[rule.threshold.cardinality]]
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field = "destination.port"
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value = 250
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