Analytics Story: Network Discovery

Updated Date: 2026-05-13 ID: af228995-f182-49d7-90b3-2a732944f00f Author: Teoderick Contreras, Splunk Product: Splunk Enterprise Security

Description

Leverage searches that allow you to detect and investigate unusual activities that might relate to the network discovery, including looking for network configuration, settings such as IP, MAC address, firewall settings and many more.

Why it matters

Adversaries may use the information from System Network Configuration Discovery during automated discovery to shape follow-on behaviors, including determining certain access within the target network and what actions to do next.

Detections

Name ▲▼	Technique ▲▼	Type ▲▼
Internal Vertical Port Scan	Network Service Discovery	TTP
Internal Horizontal Port Scan	Network Service Discovery	TTP
Windows Netspy Network Scanner Execution	Remote System Discovery, Active Scanning	Anomaly
Windows Detect Network Scanner Behavior	Scanning IP Blocks, Vulnerability Scanning	Anomaly
Internal Horizontal Port Scan NMAP Top 20	Network Service Discovery	TTP
Linux System Network Discovery	System Network Configuration Discovery	Anomaly
MacOS List Firewall Rules	System Network Configuration Discovery	Anomaly
Internal Vulnerability Scan	Network Service Discovery, Vulnerability Scanning	TTP
Windows Network Share Interaction Via Net	Data from Network Shared Drive, Network Share Discovery	Hunting

Data Sources

Name ▲▼	Platform ▲▼	Sourcetype ▲▼	Source ▲▼
AWS CloudWatchLogs VPCflow	AWS	`aws:cloudwatchlogs:vpcflow`	`aws_cloudwatchlogs_vpcflow`
Cisco Secure Firewall Threat Defense Connection Event	Other	`cisco:sfw:estreamer`	`not_applicable`
CrowdStrike ProcessRollup2	Other	`crowdstrike:events:sensor`	`crowdstrike`
Sysmon EventID 1	Windows	`XmlWinEventLog`	`XmlWinEventLog:Microsoft-Windows-Sysmon/Operational`
Windows Event Log Security 4688	Windows	`XmlWinEventLog`	`XmlWinEventLog:Security`
Sysmon EventID 3	Windows	`XmlWinEventLog`	`XmlWinEventLog:Microsoft-Windows-Sysmon/Operational`
Sysmon for Linux EventID 1	Linux	`sysmon:linux`	`Syslog:Linux-Sysmon/Operational`
Osquery Results	Other	`osquery:results`	`osquery`

References

Source: GitHub | Version: 2