
title: Detecting Fake Instances Of Hxtsr.exe
author: Sreeman
date: 2020/04/17
description: HxTsr.exe is a Microsoft compressed executable file called Microsoft
  Outlook Communications.HxTsr.exe is part of Outlook apps, because it resides in
  a hidden "WindowsApps" subfolder of "C:\Program Files". Its path includes a version
  number, e.g., "C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7466.41167.0_x64__8wekyb3d8bbwe\HxTsr.exe".
  Any instances of hxtsr.exe not in this folder may be malware camouflaging itself
  as HxTsr.exe
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    Image: hxtsr.exe
  SELECTION_3:
    CurrentDirectory|re: (?i)c:\\\\program files\\\\windowsapps\\\\microsoft\.windowscommunicationsapps_.*\\\\hxtsr\.exe
  condition: (SELECTION_1 and SELECTION_2 and  not (SELECTION_3))
falsepositives:
- unknown
id: 4e762605-34a8-406d-b72e-c1a089313320
level: medium
logsource:
  category: process_creation
  product: windows
modified: 2021/07/07
status: experimental
tags:
- attack.defense_evasion
- attack.t1036
ruletype: SIGMA
