System Network Connections Discovery - Linux

Title: System Network Connections Discovery - Linux
Status: test
Description:Detects usage of system utilities to discover system network connections
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1049/T1049.md
Author: Daniil Yugoslavskiy, oscd.community
Date: 2020-10-19
modified:2023-01-17
Tags:

• -'attack.discovery'
• -'attack.t1049'

Logsource:

• category: process_creation
• product: linux

Detection:
  selection:
    Image|endswith:
      -'/who'
      -'/w'
      -'/last'
      -'/lsof'
      -'/netstat'

  filter_landscape_sysinfo:
    ParentCommandLine|contains: '/usr/bin/landscape-sysinfo'
    Image|endswith: '/who'
  condition:selection and not 1 of filter_*
Falsepositives:
  -Legitimate activities
Level: low