{"id":"312b42b1-bded-4441-8b58-163a3af58775","title":"Potentially Suspicious Execution From Tmp Folder","description":"Detects a potentially suspicious execution of a process located in the '/tmp/' folder","author":"Joseliyo Sanchez, @Joseliyo_Jstnk","status":"test","level":"medium","date":"2023-06-02","modified":"2025-08-05","tags":["attack.stealth","attack.t1036"],"technique_ids":["T1036"],"logsource":{"product":"linux","category":"process_creation"},"falsepositives":["Unknown"],"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"],"source_path":"rules/linux/process_creation/proc_creation_lnx_susp_execution_tmp_folder.yml","source_sha256":"70079d6229ed039d1dd45b6c730fb8f9d3be4bfe51211e7d786d59cbcea16e9d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/process_creation/proc_creation_lnx_susp_execution_tmp_folder.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potentially Suspicious Execution From Tmp Folder\nid: 312b42b1-bded-4441-8b58-163a3af58775\nstatus: test\ndescription: Detects a potentially suspicious execution of a process located in the '/tmp/' folder\nreferences:\n    - https://blogs.jpcert.or.jp/en/2023/05/gobrat.html\n    - https://jstnk9.github.io/jstnk9/research/GobRAT-Malware/\n    - https://www.virustotal.com/gui/file/60bcd645450e4c846238cf0e7226dc40c84c96eba99f6b2cffcd0ab4a391c8b3/detection\n    - https://www.virustotal.com/gui/file/3e44c807a25a56f4068b5b8186eee5002eed6f26d665a8b791c472ad154585d1/detection\nauthor: Joseliyo Sanchez, @Joseliyo_Jstnk\ndate: 2023-06-02\nmodified: 2025-08-05\ntags:\n    - attack.stealth\n    - attack.t1036\nlogsource:\n    product: linux\n    category: process_creation\ndetection:\n    selection:\n        Image|startswith: '/tmp/'\n    filter_optional_nextcloud:\n        Image|endswith: '/usr/bin/nextcloud'\n    condition: selection and not 1 of filter_optional_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"}],"data_path":"data/detection-rules/312b42b1-bded-4441-8b58-163a3af58775.json","kind":"sigma"}