Potentially Suspicious Execution From Tmp Folder

Title: Potentially Suspicious Execution From Tmp Folder
Status: test
Description:Detects a potentially suspicious execution of a process located in the '/tmp/' folder
References:
  -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: Joseliyo Sanchez, @Joseliyo_Jstnk
Date: 2023-06-02
modified:2025-08-05
Tags:

• -'attack.stealth'
• -'attack.t1036'

Logsource:

• product: linux
• category: process_creation

Detection:
  selection:
    Image|startswith: '/tmp/'
  filter_optional_nextcloud:
    Image|endswith: '/usr/bin/nextcloud'
  condition:selection and not 1 of filter_optional_*
Falsepositives:
  -Unknown
Level: medium