Suspicious Wget Creating Files in Tmp Directory (via file_event)

title: Suspicious Wget Creating Files in Tmp Directory (via file_event)
id: 6eed2654-1f19-5d30-b058-25add425ff0e
status: stable
description: This rule detects the use of wget to download content in a temporary directory such as "/tmp" or "/var/tmp"
references:
    - https://attack.mitre.org/techniques/T1105/
    - https://blogs.jpcert.or.jp/en/2023/05/gobrat.html
    - https://jstnk9.github.io/jstnk9/research/GobRAT-Malware/
    - https://www.virustotal.com/gui/file/60bcd645450e4c846238cf0e7226dc40c84c96eba99f6b2cffcd0ab4a391c8b3/detection
    - https://www.virustotal.com/gui/file/3e44c807a25a56f4068b5b8186eee5002eed6f26d665a8b791c472ad154585d1/detection
author: Huntrule Team
date: 2026-07-28
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    product: linux
    category: file_event
detection:
    selection:
        Image|endswith: '/wget'
        TargetFilename|startswith:
            - '/tmp/'
            - '/var/tmp/'
    condition: selection
falsepositives:
    - Unknown
level: medium