Overview

overview

8

Static

static

3

backrooms.exe

windows10-2004-x64

7

backrooms.exe

windows10-ltsc_2021-x64

7

backrooms.exe

windows11-21h2-x64

7

backrooms.exe

windows11-ltsc_2024-x64

8

Analysis

  • user interaction
    yes
  • max time kernel
    237s
  • max time network
    209s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    20/06/2026, 10:47

Sharing

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General

  • Target
    backrooms.exe
  • Size 105.8MB
  • Sample260620-mvxbrsev2m
  • SHA256 90604a40452363896d5f3125ee551fecb73d5229b4efb5dee739f784cb7ca96d
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarepersistenceransomwarespyware

Malware Config

Signatures

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Loads dropped DLL 51 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Checks SCSI registry key(s) 3 TTPs 64 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 38 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of SendNotifyMessage 45 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\backrooms.exe
    "C:\Users\Admin\AppData\Local\Temp\backrooms.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5252
    • C:\Users\Admin\AppData\Local\Temp\backrooms.exe
      "C:\Users\Admin\AppData\Local\Temp\backrooms.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious behavior: GetForegroundWindowSpam
      PID:2488
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004EC 0x00000000000004E4
    1⤵
      PID:2924
    • C:\Windows\system32\sihost.exe
      sihost.exe
      1⤵
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2196
      • C:\Windows\explorer.exe
        explorer.exe /LOADSAVEDWINDOWS
        2⤵
        • Boot or Logon Autostart Execution: Active Setup
        • Enumerates connected drives
        • Checks SCSI registry key(s)
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4992
        • C:\Windows\system32\mspaint.exe
          "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Desktop\InstallUnprotect.jpg"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:5064
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:3656
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:2404
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
      1⤵
      • Checks SCSI registry key(s)
      PID:4424

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          prep_Activatable Class_Hermes_perf.cache
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
          • Size 599B
          • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          81d243bd2c585b0f4821__mypyc.cp314-win_amd64.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\81d243bd2c585b0f4821__mypyc.cp314-win_amd64.pyd
          • Size 211KB
          • SHA256 ab64835b63093c31975df2692756c8008e7ec190e4aa86f15a713bcc62e1d432
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _imaging.cp314-win_amd64.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PIL\_imaging.cp314-win_amd64.pyd
          • Size 2.5MB
          • SHA256 b4e06283c347910b5973bd5732159ea9eb26eda48e3eed183be2e3382db26597
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSVCP140.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PyQt5\Qt5\bin\MSVCP140.dll
          • Size 576KB
          • SHA256 88f55d86b50b0a7e55e71ad2d8f7552146ba26e927230daf2e26ad3a971973c5
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSVCP140_1.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PyQt5\Qt5\bin\MSVCP140_1.dll
          • Size 30KB
          • SHA256 446c48c1224c289bd3080087fe15d6759416d64f4136addf30086abd5415d83f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Qt5Core.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PyQt5\Qt5\bin\Qt5Core.dll
          • Size 5.7MB
          • SHA256 8d2ff4ce9096ddccc4f4cd62c2e41fc854cfd1b0d6e8d296645a7f5fd4ae565a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          QtCore.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PyQt5\QtCore.pyd
          • Size 2.4MB
          • SHA256 d6e45fd8c3b3f93f52c4d1b6f9e3ee220454a73f80f65f3d70504bd55415ea37
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          sip.cp314-win_amd64.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\PyQt5\sip.cp314-win_amd64.pyd
          • Size 119KB
          • SHA256 d28abbdd34489218c228dbbd3b6d2dfad87e172e975e8d69d2e8f3c4d6d4d376
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          VCRUNTIME140.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\VCRUNTIME140.dll
          • Size 117KB
          • SHA256 052ad6a20d375957e82aa6a3c441ea548d89be0981516ca7eb306e063d5027f4
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          VCRUNTIME140_1.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\VCRUNTIME140_1.dll
          • Size 48KB
          • SHA256 6a99bc0128e0c7d6cbbf615fcc26909565e17d4ca3451b97f8987f9c6acbc6c8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _bz2.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_bz2.pyd
          • Size 86KB
          • SHA256 ef5277eb670219274e7d1e92190ddf7f4bb94d4922ca1c1a12efadfd2c4c66f6
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _ctypes.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_ctypes.pyd
          • Size 139KB
          • SHA256 fd4847b99cd504a66bdc4739f15181b562774e6736bb88775880b073276dede1
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _hashlib.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_hashlib.pyd
          • Size 67KB
          • SHA256 9bc6ffcd2ab4ac87c4035f18b432e888d0d4a36795c97bf3f28ddf32cc34e40f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _lzma.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_lzma.pyd
          • Size 157KB
          • SHA256 39e5bc3624a26c9f6ad2e2df412543b0bd697a1d75338b44fe99763358d6d8cb
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _queue.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_queue.pyd
          • Size 35KB
          • SHA256 acf60e246f6a83a914fb6c411f04bd3eb8bba83070612ca44af99d74f06c5524
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _socket.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_socket.pyd
          • Size 85KB
          • SHA256 65caaa6f35c329d901ba3f3d9f7fc4d7443dcde89907dccbd6748786cc517476
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _ssl.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_ssl.pyd
          • Size 180KB
          • SHA256 12e31f50739e33b115c7e10febf1ccedeb5d9353cd539c608cc5dd164bee17a7
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _tkinter.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_tkinter.pyd
          • Size 67KB
          • SHA256 14f0b750f800ed529a06052369428f75f204005be1633400c9fe0ca544d82f85
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _wmi.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_wmi.pyd
          • Size 39KB
          • SHA256 6fb2c6316628664319b2abcf961f0cbbac809966a65b653c86e7864ad8701496
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _zstd.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\_zstd.pyd
          • Size 491KB
          • SHA256 54e6acfbc1cb27c9afea0e133cadac68b89869ff1a14eb0c678d40eb9c655347
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          base_library.zip
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\base_library.zip
          • Size 1.3MB
          • SHA256 9fddc3fd386b78a8f5a59ffa88b7c1457a490469c0e9582278147a0173e60323
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          cd.cp314-win_amd64.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\charset_normalizer\cd.cp314-win_amd64.pyd
          • Size 10KB
          • SHA256 da3ce780d6d58ae8c6920b99f806f64d58a1b33f4a01382861b01b50549199f8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libcrypto-3.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\libcrypto-3.dll
          • Size 5.0MB
          • SHA256 8b27ebae75cc99f20075322446af36c9ffcb4e3b400a77d712ef43f007f47f7d
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libffi-8.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\libffi-8.dll
          • Size 38KB
          • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          libssl-3.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\libssl-3.dll
          • Size 776KB
          • SHA256 56dd50fb903b860ace831d0cd6c6250cd57e8655867c3a0fa16eac2d4cc0ba0b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          python3.DLL
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\python3.DLL
          • Size 72KB
          • SHA256 f3d0cd260a46a9617a8b1d4d5e8703278478c22a910165bffb4e4ddf6562d93f
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          python314.DLL
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\python314.DLL
          • Size 6.5MB
          • SHA256 18310593c50ad109fc5c95db1fd5c92ecec9e1bfc66c976df9fc11dd62616d5a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          select.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\select.pyd
          • Size 32KB
          • SHA256 8c3ee20776d8eb7c441f2006ed46b9ba932060c6b66df4c1e156dcf7738d56ce
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Lorem ipsum.txt
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\setuptools\_vendor\jaraco\text\Lorem ipsum.txt
          • Size 1KB
          • SHA256 37fedcffbf73c4eb9f058f47677cb33203a436ff9390e4d38a8e01c9dad28e0b
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          tcl86t.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\tcl86t.dll
          • Size 1.8MB
          • SHA256 77c41c2d5850224b21d1f35d29cff87ac4d5d847e3694c52f5f63f5eaac7d1f2
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          tk86t.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\tk86t.dll
          • Size 1.5MB
          • SHA256 c85f46920f82c05ac7eb6ea27dcf85d716377edaede778bcd2c40d991e341f22
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          unicodedata.pyd
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\unicodedata.pyd
          • Size 740KB
          • SHA256 a7a2bfeed5d0480d8c458b3a61ee32c478ae10c694e8be61c3ba0e8cc2a6e1c6
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          zlib1.dll
          • Path C:\Users\Admin\AppData\Local\Temp\_MEI52522\zlib1.dll
          • Size 144KB
          • SHA256 4f4168a375d3628f96846f5a9319f55521a501e30d9b7e91c384e64fb3245d4c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/2404-1274-0x0000022176CE0000-0x0000022176DE0000-memory.dmp
          Download

          memory/2404-1305-0x000002297C3D0000-0x000002297C3F0000-memory.dmp
          Download

          memory/2404-1319-0x000002297C850000-0x000002297C870000-memory.dmp
          Download

          memory/2404-1286-0x000002297C450000-0x000002297C550000-memory.dmp
          Download

          memory/2404-1284-0x000002297BFF0000-0x000002297C010000-memory.dmp
          Download

          memory/2488-1222-0x00007FFBEAA30000-0x00007FFBEAC93000-memory.dmp
          Download

          memory/2488-1250-0x00007FFBF71F0000-0x00007FFBF7219000-memory.dmp
          Download

          memory/2488-1457-0x00007FFBF71F0000-0x00007FFBF7219000-memory.dmp
          Download