title: Linux Remote System Discovery
id: 11063ec2-de63-4153-935e-b1a8b9e616f1
status: experimental
description: Detects the enumeration of other remote systems.
author: Alejandro Ortuno, oscd.community
date: 2020/10/22
references:
  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1018/T1018.md
logsource:
  category: process_creation
  product: linux
detection:
  selection_1:
    Image|endswith: '/arp'
    CommandLine|contains: '-a'
  selection_2:
    Image|endswith: '/ping'
    CommandLine|contains:
      - ' 10.' #10.0.0.0/8
      - ' 192.168.' #192.168.0.0/16
      - ' 172.16.' #172.16.0.0/12
      - ' 172.17.'
      - ' 172.18.'
      - ' 172.19.'
      - ' 172.20.'
      - ' 172.21.'
      - ' 172.22.'
      - ' 172.23.'
      - ' 172.24.'
      - ' 172.25.'
      - ' 172.26.'
      - ' 172.27.'
      - ' 172.28.'
      - ' 172.29.'
      - ' 172.30.'
      - ' 172.31.'
      - ' 127.' #127.0.0.0/8
      - ' 169.254.' #169.254.0.0/16
  condition: 1 of them
falsepositives:
  - Legitimate administration activities
level: low
tags:
  - attack.discovery
  - attack.t1018
