File and Directory Discovery - Linux

Title: File and Directory Discovery - Linux
Status: test
Description:Detects usage of system utilities such as "find", "tree", "findmnt", etc, to discover files, directories and network shares.
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1083/T1083.md
Author: Daniil Yugoslavskiy, oscd.community, CheraghiMilad
Date: 2020-10-19
modified:2024-12-01
Tags:

• -'attack.discovery'
• -'attack.t1083'

Logsource:

• category: process_creation
• product: linux

Detection:
  selection_file_with_asterisk:
    Image|endswith: '/file'
    CommandLine|re: '(.){200,}'
  selection_recursive_ls:
    Image|endswith: '/ls'
    CommandLine|contains: '-R'
  selection_find_execution:
    Image|endswith: '/find'
  selection_tree_execution:
    Image|endswith: '/tree'
  selection_findmnt_execution:
    Image|endswith: '/findmnt'
  selection_locate_execution:
    Image|endswith: '/mlocate'
  condition:1 of selection_*
Falsepositives:
  -Legitimate activities
Level: informational