Palo Alto - possible nmap scan on with top 100 option

Back


Id	4d61bb9a-7f6d-45b1-ac0e-517e2a92f6fd
Rulename	Palo Alto - possible nmap scan on with top 100 option
Description	Detect possible execution of Nmap top 100 option. This detection will detect scanning of 90% of Top 100 port of NMAP in less than 2 minutes. Unusual port only access through a scan are present in this list which is a good indicator of reconnaissance tactics. Whitelisting of Company scanners is required with implementation of the rule. Ref : https://nmap.org/book/performance-port-selection.html
Severity	Medium
Tactics	Reconnaissance
Techniques	T1595
Required data connectors	CefAma
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAlto-PAN-OS/Analytic Rules/PaloAlto-Top100_NmapScan.yaml
Version	1.0.0
Arm template	4d61bb9a-7f6d-45b1-ac0e-517e2a92f6fd.json

KQL

CommonSecurityLog
| where ipv4_is_private(SourceIP)
| where DestinationPort in (7, 9, 13, 21, 22, 23, 25, 26, 37, 79, 81, 88, 106, 110, 111, 119, 135, 139, 143, 144, 179, 199, 389, 427, 444, 445, 465, 513, 514, 515, 543, 544, 548, 554, 587, 631, 646, 873, 990, 993, 995, 1025, 1026, 1027, 1028, 1029, 1110, 1433, 1720, 1723, 1755, 1900, 2000, 2001, 2049, 2121, 2717, 3000, 3128, 3306, 3389, 3986, 4899, 5000, 5009, 5051, 5060, 5101, 5190, 5357, 5432, 5631, 5666, 5800, 5900, 6000, 6001, 6646, 7070, 8000, 8008, 8009, 8080, 8081, 8443, 8888, 9100, 9999, 10000, 32768, 49152, 49153, 49154, 49155, 49156, 49157)
| summarize
    dcount(DestinationPort),
    make_set(DestinationPort),
    make_set(ApplicationProtocol),
    make_set(Activity),
    make_set(SourcePort),
    StartTime = min(TimeGenerated),
    EndTime = max(TimeGenerated)
    by SourceIP, DestinationIP, Computer, bin(TimeGenerated, 2m)
| where dcount_DestinationPort > 90

YAML

id: 4d61bb9a-7f6d-45b1-ac0e-517e2a92f6fd
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAlto-PAN-OS/Analytic Rules/PaloAlto-Top100_NmapScan.yaml
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: DestinationIP
  entityType: IP
- fieldMappings:
  - identifier: FullName
    columnName: Computer
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
queryFrequency: 5m
queryPeriod: 5m
status: Available
query: |
  CommonSecurityLog
  | where ipv4_is_private(SourceIP)
  | where DestinationPort in (7, 9, 13, 21, 22, 23, 25, 26, 37, 79, 81, 88, 106, 110, 111, 119, 135, 139, 143, 144, 179, 199, 389, 427, 444, 445, 465, 513, 514, 515, 543, 544, 548, 554, 587, 631, 646, 873, 990, 993, 995, 1025, 1026, 1027, 1028, 1029, 1110, 1433, 1720, 1723, 1755, 1900, 2000, 2001, 2049, 2121, 2717, 3000, 3128, 3306, 3389, 3986, 4899, 5000, 5009, 5051, 5060, 5101, 5190, 5357, 5432, 5631, 5666, 5800, 5900, 6000, 6001, 6646, 7070, 8000, 8008, 8009, 8080, 8081, 8443, 8888, 9100, 9999, 10000, 32768, 49152, 49153, 49154, 49155, 49156, 49157)
  | summarize
      dcount(DestinationPort),
      make_set(DestinationPort),
      make_set(ApplicationProtocol),
      make_set(Activity),
      make_set(SourcePort),
      StartTime = min(TimeGenerated),
      EndTime = max(TimeGenerated)
      by SourceIP, DestinationIP, Computer, bin(TimeGenerated, 2m)
  | where dcount_DestinationPort > 90  
name: Palo Alto - possible nmap scan on with top 100 option
kind: Scheduled
tactics:
- Reconnaissance
severity: Medium
relevantTechniques:
- T1595
triggerThreshold: 0
version: 1.0.0
description: |
    'Detect possible execution of Nmap top 100 option. This detection will detect scanning of 90% of Top 100 port of NMAP in less than 2 minutes. Unusual port only access through a scan are present in this list which is a good indicator of reconnaissance tactics. Whitelisting of Company scanners is required with implementation of the rule. Ref : https://nmap.org/book/performance-port-selection.html'

ARM