Terrance DeJesus
b8ae2218f8
* 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>
70 lines
2.2 KiB
TOML
70 lines
2.2 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 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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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", "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 : (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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