{"id":"4e762605-34a8-406d-b72e-c1a089313320","title":"Potential Fake Instance Of Hxtsr.EXE Executed","description":"HxTsr.exe is a Microsoft compressed executable file called Microsoft Outlook Communications.\nHxTsr.exe is part of Outlook apps, because it resides in a hidden \"WindowsApps\" subfolder of \"C:\\Program Files\".\nAny instances of hxtsr.exe not in this folder may be malware camouflaging itself as HxTsr.exe\n","author":"Sreeman","status":"test","level":"medium","date":"2020-04-17","modified":"2024-02-08","tags":["attack.stealth","attack.t1036"],"technique_ids":["T1036"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Unknown"],"references":["Internal Research"],"source_path":"rules/windows/process_creation/proc_creation_win_hxtsr_masquerading.yml","source_sha256":"63ae5cdd8699568776b47307067799a5d7ccb05851722cd5bbbfb8b04cc6fd42","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_hxtsr_masquerading.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Fake Instance Of Hxtsr.EXE Executed\nid: 4e762605-34a8-406d-b72e-c1a089313320\nstatus: test\ndescription: |\n    HxTsr.exe is a Microsoft compressed executable file called Microsoft Outlook Communications.\n    HxTsr.exe is part of Outlook apps, because it resides in a hidden \"WindowsApps\" subfolder of \"C:\\Program Files\".\n    Any instances of hxtsr.exe not in this folder may be malware camouflaging itself as HxTsr.exe\nreferences:\n    - Internal Research\nauthor: Sreeman\ndate: 2020-04-17\nmodified: 2024-02-08\ntags:\n    - attack.stealth\n    - attack.t1036\nlogsource:\n    product: windows\n    category: process_creation\ndetection:\n    # TODO: Link this to the more generic system process rule\n    selection:\n        Image|endswith: '\\hxtsr.exe'\n    filter_main_hxtsr:\n        Image|contains: ':\\program files\\windowsapps\\microsoft.windowscommunicationsapps_'\n        Image|endswith: '\\hxtsr.exe'\n    condition: selection and not 1 of filter_main_*\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/4e762605-34a8-406d-b72e-c1a089313320.json","kind":"sigma"}