sigmalowHunting

Hidden Files and Directories

Detects adversary creating hidden file or directory, by detecting directories or files with . as the first character

MITRE ATT&CK

defense-evasion

Detection Query

selection_commands:
  type: EXECVE
  a0:
    - mkdir
    - nano
    - touch
    - vi
    - vim
selection_arguments:
  - a1|re: (^|\/)\.[^.\/]
  - a2|re: (^|\/)\.[^.\/]
condition: all of selection_*

Author

Pawel Mazur

Created

2021-09-06

Data Sources

linuxauditd

Platforms

linux

References

https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1564.001/T1564.001.md

Tags

attack.defense-evasionattack.t1564.001

Raw Content

title: Hidden Files and Directories
id: d08722cd-3d09-449a-80b4-83ea2d9d4616
status: test
description: Detects adversary creating hidden file or directory, by detecting directories or files with . as the first character
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1564.001/T1564.001.md
author: 'Pawel Mazur'
date: 2021-09-06
modified: 2025-06-16
tags:
    - attack.defense-evasion
    - attack.t1564.001
logsource:
    product: linux
    service: auditd
detection:
    selection_commands:
        type: 'EXECVE'
        a0:
            - 'mkdir'
            - 'nano'
            - 'touch'
            - 'vi'
            - 'vim'
    selection_arguments:
        - a1|re: '(^|\/)\.[^.\/]'
        - a2|re: '(^|\/)\.[^.\/]'
    condition: all of selection_*
falsepositives:
    - Unknown
level: low