Analytics Story: Network Discovery

Date: 2022-02-14 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 ▲▼
Windows Network Share Interaction With Net	Network Share Discovery, Data from Network Shared Drive	TTP
Linux System Network Discovery	System Network Configuration Discovery	Anomaly
Windows Detect Network Scanner Behavior	Active Scanning, Scanning IP Blocks, Vulnerability Scanning	Anomaly
Windows Network Share Interaction Via Net	Network Share Discovery, Data from Network Shared Drive	Anomaly
Internal Horizontal Port Scan	Network Service Discovery	TTP
Internal Horizontal Port Scan NMAP Top 20	Network Service Discovery	TTP
Internal Vertical Port Scan	Network Service Discovery	TTP
Internal Vulnerability Scan	Vulnerability Scanning, Network Service Discovery	TTP

Data Sources

Name ▲▼	Platform ▲▼	Sourcetype ▲▼	Source ▲▼
AWS CloudWatchLogs VPCflow	AWS	`aws:cloudwatchlogs:vpcflow`	`aws_cloudwatchlogs_vpcflow`
CrowdStrike ProcessRollup2	N/A	`crowdstrike:events:sensor`	`crowdstrike`
Sysmon EventID 1	Windows	`xmlwineventlog`	`XmlWinEventLog:Microsoft-Windows-Sysmon/Operational`
Sysmon EventID 3	Windows	`xmlwineventlog`	`XmlWinEventLog:Microsoft-Windows-Sysmon/Operational`
Sysmon for Linux EventID 1	Linux	`sysmon:linux`	`Syslog:Linux-Sysmon/Operational`
Windows Event Log Security 4688	Windows	`xmlwineventlog`	`XmlWinEventLog:Security`

References

Source: GitHub | Version: 1