Overview

overview

8

Static

static

3

771-Tool.exe

windows10-2004-x64

8

771-Tool.exe

windows11-ltsc_2024-x64

8

Analysis

  • user interaction
    yes
  • max time kernel
    900s
  • max time network
    548s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/11/2026, 22:46

Sharing

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General

  • Target
    771-Tool.exe
  • Size 18.9MB
  • Sample261104-2p3zpavydw
  • SHA256 31d7646ff4a2373956c18727a8d6c70f1a7020686cf5b24f958499e43a585542
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarediscoveryexecutionpersistenceransomwarespyware

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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

    execution
  • Loads dropped DLL 36 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 43 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 5 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\771-Tool.exe
    "C:\Users\Admin\AppData\Local\Temp\771-Tool.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4100
    • C:\Users\Admin\AppData\Local\Temp\771-Tool.exe
      C:\Users\Admin\AppData\Local\Temp\771-Tool.exe
      2⤵
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • Suspicious use of WriteProcessMemory
      PID:2776
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c
        3⤵
        • Executes a command shell one-liner
        PID:1636
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -WindowStyle Hidden -Command " [Windows.UI.Notifications.ToastNotificationManager, Windows.UI.Notifications, ContentType = WindowsRuntime] | Out-Null [Windows.Data.Xml.Dom.XmlDocument, Windows.Data.Xml.Dom.XmlDocument, ContentType = WindowsRuntime] | Out-Null $template = @\" <toast> <visual> <binding template=\"ToastGeneric\"> <text>welcome , to 771_Gr0up Tool</text> <text>discord.gg/771</text> </binding> </visual> </toast> \"@ $xml = New-Object Windows.Data.Xml.Dom.XmlDocument $xml.LoadXml($template) $toast = New-Object Windows.UI.Notifications.ToastNotification $xml [Windows.UI.Notifications.ToastNotificationManager]::CreateToastNotifier(\"771_Gr0up\").Show($toast) "
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1512
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c cls
        3⤵
        • Executes a command shell one-liner
        PID:3224
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5832
    • 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 use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:6076
  • 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:4812
  • 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:2804
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:1972
    • C:\Windows\System32\SecurityHealthHost.exe
      \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
      1⤵
        PID:4244

      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

            Gr0up_771-nuker.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\Gr0up_771-nuker.dll
            • Size 38.6MB
            • SHA256 8b535109c3dd935a04094b4877f6fb1c5f2e8237b9ee99ca4c94fb7b298a4f0d
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _asyncio.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_asyncio.pyd
            • Size 76KB
            • SHA256 f9594a2a4f45570dbfdf1f3471194ae7b27dc117c54b9af6bc22df9c93830f8b
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _brotli.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_brotli.pyd
            • Size 836KB
            • SHA256 44f02bcf2b15519a487cf653e16b5f9c65f26d0be559592878988ad47148fc5e
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _bz2.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_bz2.pyd
            • Size 86KB
            • SHA256 b938073c85cf6b9fe80556d7899ed1901e5e60b7adea2832442376239fb36b36
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _ctypes.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_ctypes.pyd
            • Size 139KB
            • SHA256 408cc4e7a22ffa418ca52f5e13fe9268a3c50a2bc9de02b0530b555ef591bc5a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _hashlib.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_hashlib.pyd
            • Size 67KB
            • SHA256 5933ef5eda7c0bca0b3874a6e2c5f13b91b8f2cfc29bc46160df3212a1dbee79
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _lzma.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_lzma.pyd
            • Size 157KB
            • SHA256 d2abf8db7fb0cf6285663b177991691a41b37e215c3d71fd087a98d8ec1bee63
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _overlapped.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_overlapped.pyd
            • Size 56KB
            • SHA256 1d7028683e6ec50c159139238f90a6c8431ece139a4764900ca11c941ba05d46
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _socket.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_socket.pyd
            • Size 85KB
            • SHA256 02265dd0d0287f3ffd287ea5d8e3c918a5a056e8ef2c4529857f5e84ec9e2519
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _ssl.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_ssl.pyd
            • Size 186KB
            • SHA256 4cfb154c7cc525d57020c0e64f2dd876a78b46cd38419446392478de6b7b13b8
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _uuid.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_uuid.pyd
            • Size 27KB
            • SHA256 fbfd7fe8583b346ba20b174b2510c0830237f5092bdf9fc26da9d6b25b018385
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _wmi.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_wmi.pyd
            • Size 39KB
            • SHA256 b6fd41f079da0c0054829855360e88b8b762f5c42bb474c2fa02eae367839ad2
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _zstd.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\_zstd.pyd
            • Size 491KB
            • SHA256 33c6eca99470c3eb9d776b617c550ad41b002a668336f062a9ab7be677a7409a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _http_parser.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\aiohttp\_http_parser.pyd
            • Size 258KB
            • SHA256 44e90b54298a360c85678e0a4e45713bcf72305c1dc05dcb06aa0a6200eef7dd
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _http_writer.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\aiohttp\_http_writer.pyd
            • Size 43KB
            • SHA256 471d44a62f269545f4608aef5c84a5d75fbd7a99fef2fed680fa5bccf389432d
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            mask.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\aiohttp\_websocket\mask.pyd
            • Size 34KB
            • SHA256 5f5c3de90b92c76af16b3773cb95f39d27acf2631adfa1da4e7dbf66e6be9d8a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            reader_c.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\aiohttp\_websocket\reader_c.pyd
            • Size 138KB
            • SHA256 ace655e0e595d5f29f5347e85ed294402ea624cb57ed73a879db78c3b68b792f
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _audioop.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\audioop\_audioop.pyd
            • Size 48KB
            • SHA256 c9f875e7f6eb8ca8c9dddcf8f875e330f1b831b8ac042cfdb838fb2ae6cd40ef
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _frozenlist.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\frozenlist\_frozenlist.pyd
            • Size 68KB
            • SHA256 054e5d97884e8d833528aa3a98868204a3ec46cabb6a656e72432634d117880a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            libcrypto-3.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\libcrypto-3.dll
            • Size 6.0MB
            • SHA256 53c529145339fb042a3dcd3a09c2d7753204f8b4fc79d99e0d31e69a33985958
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            libffi-8.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\libffi-8.dll
            • Size 38KB
            • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            libssl-3.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\libssl-3.dll
            • Size 1.3MB
            • SHA256 b17a87979862d19241edc4318f967e24c3ec356ed6c2368f561179fab2311001
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _multidict.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\multidict\_multidict.pyd
            • Size 86KB
            • SHA256 0d3c5eb151a543acdd30d82a9cf0ea411a09dd97c369c154d4874f0aa97df76e
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _helpers_c.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\propcache\_helpers_c.pyd
            • Size 64KB
            • SHA256 cb2e3b34bafecbe41b058cf858916b092659745e3112dae913a9e390ca3b2827
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            python3.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\python3.dll
            • Size 72KB
            • SHA256 6c45910e7c82617ca6360820de861699cc99f9efee434df290aa4c6e38f39886
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            python314.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\python314.dll
            • Size 6.5MB
            • SHA256 0f9857ffdfe010fe6b99328d58c2e3c7472ce75f336bf9c2ad9bd5bca3bce700
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            select.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\select.pyd
            • Size 32KB
            • SHA256 722328e7fad8048057fc966474ba73966d2ceebaa32e7344cce09640ab4dc9bd
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            unicodedata.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\unicodedata.pyd
            • Size 741KB
            • SHA256 280b09bd97b598d18c0ed9542dc18ed35fa57a16e84f8e65fd9c6e96516c28d6
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            vcruntime140.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\vcruntime140.dll
            • Size 174KB
            • SHA256 d1f4225df2cd877dbf130d5668a021dce3f94118455ff5ec952061c30afc9ce7
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            vcruntime140_1.dll
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\vcruntime140_1.dll
            • Size 48KB
            • SHA256 a7146c08f89fe5b04541ab507cdb59ff7b44534d4ba3c668a426c6450a03434e
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            _quoting_c.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\yarl\_quoting_c.pyd
            • Size 80KB
            • SHA256 3912a5ed94d6928ea73abf3308dcd40fe67223a037846d10d3a773203d807beb
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            backend_c.pyd
            • Path C:\Users\Admin\AppData\Local\Temp\onefile_4100_094969_Xd89yQDx1Sg\zstandard\backend_c.pyd
            • Size 510KB
            • SHA256 da3beaa10d453d8af37f650d04e031f2d83004c05d77d540b46407f8beda2e4f
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            memory/1512-111-0x000001D34A4A0000-0x000001D34A4AA000-memory.dmp
            Download

            memory/1512-112-0x000001D362740000-0x000001D362748000-memory.dmp
            Download

            memory/1512-108-0x000001D34A440000-0x000001D34A462000-memory.dmp
            Download

            memory/2804-141-0x0000017283A10000-0x0000017283A30000-memory.dmp
            Download

            memory/2804-180-0x00000172941F0000-0x0000017294210000-memory.dmp
            Download

            memory/2804-143-0x0000017283E30000-0x0000017283F30000-memory.dmp
            Download

            memory/2804-152-0x0000017283C70000-0x0000017283C90000-memory.dmp
            Download

            memory/2804-135-0x00000172801E0000-0x00000172802E0000-memory.dmp
            Download