Overview

overview

8

Static

static

3

LittleBigM....0.exe

windows10-2004-x64

8

LittleBigM....0.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    136s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    12/08/2026, 04:51

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General

  • Target
    LittleBigMouse_5.6.0.exe
  • Size 25.5MB
  • Sample260812-fgvgpaygqa
  • SHA256 9d49a6bb109336a037592b3bcca8934ead080a0a16d0670c7608e55100913b18
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
defense_evasiondiscoveryinstallerpersistence

Malware Config

Signatures

  • Downloads MZ/PE file 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • System Time Discovery 1 TTPs 4 IoCs

    Adversary may gather the system time and/or time zone settings from a local or remote system.

    discovery
  • Inno Setup is an open-source installation builder for Windows applications. 2 IoCs

    Inno Setup installer

    installer
  • Kills process with taskkill 4 IoCs
    defense_evasion
  • Modifies registry class 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\LittleBigMouse_5.6.0.exe
    "C:\Users\Admin\AppData\Local\Temp\LittleBigMouse_5.6.0.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3548
    • C:\Users\Admin\AppData\Local\Temp\is-F360FH8OIF.tmp\LittleBigMouse_5.6.0.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-F360FH8OIF.tmp\LittleBigMouse_5.6.0.tmp" /SL5="$4009E,25497437,880128,C:\Users\Admin\AppData\Local\Temp\LittleBigMouse_5.6.0.exe"
      2⤵
      • Downloads MZ/PE file
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:5108
      • C:\Users\Admin\AppData\Local\Temp\is-VDWVITOLGN.tmp\dotnet-runtime-win-x64.exe
        "C:\Users\Admin\AppData\Local\Temp\is-VDWVITOLGN.tmp\dotnet-runtime-win-x64.exe" /install /quiet /norestart
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • System Time Discovery
        • Suspicious use of WriteProcessMemory
        PID:5396
        • C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\wixstdba.exe
          "C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\wixstdba.exe" -burn.ba.apiver 569705357157400576 -burn.ba.pipe BurnPipe.{41D7AD24-2E2E-4A3E-84E3-CDB5150AF760} {A11B7341-778B-49D7-AEBA-628262D62CF9}
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:4640
        • C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.be\dotnet-runtime-10.0.11-win-x64.exe
          "C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.be\dotnet-runtime-10.0.11-win-x64.exe" -q -burn.elevated BurnPipe.{65BB2D47-9EDB-4F9C-9AD3-0547F45490CF} {E6039A4C-529F-4E86-B928-3D6ADA7AFA87} 5396
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • System Time Discovery
          • Modifies registry class
          • Suspicious use of AdjustPrivilegeToken
          PID:4484
      • C:\Windows\system32\taskkill.exe
        "C:\Windows\system32\taskkill.exe" /F /IM LittleBigMouse.Ui.Loader.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1092
      • C:\Windows\system32\taskkill.exe
        "C:\Windows\system32\taskkill.exe" /F /IM LittleBigMouse.Ui.Avalonia.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3452
      • C:\Windows\system32\taskkill.exe
        "C:\Windows\system32\taskkill.exe" /F /IM LittleBigMouse.Hook.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4616
      • C:\Windows\system32\taskkill.exe
        "C:\Windows\system32\taskkill.exe" /F /IM LittleBigMouse_Daemon.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3212
  • C:\ProgramData\Package Cache\{9515CC72-C8E1-498C-9423-E0DA05D6B55B}\dotnet-runtime-10.0.11-win-x64.exe
    "C:\ProgramData\Package Cache\{9515CC72-C8E1-498C-9423-E0DA05D6B55B}\dotnet-runtime-10.0.11-win-x64.exe" /burn.runonce
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • System Time Discovery
    • Suspicious use of WriteProcessMemory
    PID:5508
    • C:\ProgramData\Package Cache\{9515CC72-C8E1-498C-9423-E0DA05D6B55B}\dotnet-runtime-10.0.11-win-x64.exe
      "C:\ProgramData\Package Cache\{9515CC72-C8E1-498C-9423-E0DA05D6B55B}\dotnet-runtime-10.0.11-win-x64.exe" /burn.log.append "C:\Users\Admin\AppData\Local\Temp\Microsoft_.NET_Runtime_-_10.0.11_(x64)_20260812055207.log" /quiet /install /norestart
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • System Time Discovery
      • Suspicious use of WriteProcessMemory
      PID:5184
      • C:\Windows\TEMP\{B4ACB994-CBDA-42E8-9EDB-7400A48E48EB}\.ba\wixstdba.exe
        "C:\Windows\TEMP\{B4ACB994-CBDA-42E8-9EDB-7400A48E48EB}\.ba\wixstdba.exe" -burn.ba.apiver 569705357157400576 -burn.ba.pipe BurnPipe.{25792E29-B582-412B-8F48-51B2BA4807D7} {9F7F7E27-749C-49F9-8321-1337907A9242}
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3408
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1000
    • C:\Windows\System32\MsiExec.exe
      C:\Windows\System32\MsiExec.exe -Embedding FE7BC4999080925C634E8BCF2DDA8C7D
      2⤵
      • Loads dropped DLL
      • Suspicious use of SetWindowsHookEx
      PID:1964

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Microsoft_.NET_Runtime_-_10.0.11_(x64)_20260812055207.log
        • Path C:\Users\Admin\AppData\Local\Temp\Microsoft_.NET_Runtime_-_10.0.11_(x64)_20260812055207.log
        • Size 19KB
        • SHA256 f7a22569ca26652a325278e2e6bf60ba791b7fa3b947731482eb8135d0b24535
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        Microsoft_.NET_Runtime_-_10.0.11_(x64)_20260812055207_000_dotnet_runtime_10.0.11_win_x64.msi.log
        • Path C:\Users\Admin\AppData\Local\Temp\Microsoft_.NET_Runtime_-_10.0.11_(x64)_20260812055207_000_dotnet_runtime_10.0.11_win_x64.msi.log
        • Size 4KB
        • SHA256 4b5a85d1758488358dff6f50548f4b8e4e4ac7e8c6d029f6ec311db9b2ff8599
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        LittleBigMouse_5.6.0.tmp
        • Path C:\Users\Admin\AppData\Local\Temp\is-F360FH8OIF.tmp\LittleBigMouse_5.6.0.tmp
        • Size 4.2MB
        • SHA256 217a000063480a8866fad97ae3273f05e353be2bc5dc0ad17d5cdb2bed994826
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet-runtime-win-x64.exe
        • Path C:\Users\Admin\AppData\Local\Temp\is-VDWVITOLGN.tmp\dotnet-runtime-win-x64.exe
        • Size 29.2MB
        • SHA256 33de99eeda0f06f4b4ad43a1fd23977343e1358f5dbb4b0d5e1b84850dc18afc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet_host_10.0.11_win_x64.msi
        • Path C:\Users\Admin\AppData\Local\Temp\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\dotnet_host_10.0.11_win_x64.msi
        • Size 848KB
        • SHA256 9b5a284ef59186a406f17adba632320c9445283df25fc1d8c91e6cf9c0aebba6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet_hostfxr_10.0.11_win_x64.msi
        • Path C:\Users\Admin\AppData\Local\Temp\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\dotnet_hostfxr_10.0.11_win_x64.msi
        • Size 920KB
        • SHA256 f60018bbec2596c180a88e7a0b6ae8e752c415b2fc049c71225d8b2ce00fffb2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet_runtime_10.0.11_win_x64.msi
        • Path C:\Users\Admin\AppData\Local\Temp\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\dotnet_runtime_10.0.11_win_x64.msi
        • Size 28.0MB
        • SHA256 e82639829de6ee49da7b508ad629a747ec3a86b2ffab20f0f9983740644f32d3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        MSICD1A.tmp
        • Path C:\Windows\Installer\MSICD1A.tmp
        • Size 411KB
        • SHA256 ac54078e0387d2a8ddcdbee3967da6ea6ec6508172505aca3d27a75fa43ce34f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        thm.wxl
        • Path C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\1033\thm.wxl
        • Size 6KB
        • SHA256 e36d45456e8b5ccec5f482b19f39188fbc166ca38d33f3a225661ae322315219
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        BootstrapperApplicationData.xml
        • Path C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\BootstrapperApplicationData.xml
        • Size 6KB
        • SHA256 26e74b6adc1f168529932779f6b15194ba6f6bc9ba188877cf3dae251e876b02
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        DotNetLogo_256x.png
        • Path C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\DotNetLogo_256x.png
        • Size 2KB
        • SHA256 0f571f95d8eab48dbc81b0ec5e9f7225e349e26ef50868bfaab556f3c2443b01
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dotnet.ico
        • Path C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\dotnet.ico
        • Size 44KB
        • SHA256 61a2cbd12868cb9b359e0c78961d409b7875f072eb8e53ea88d3e6bfe2961a18
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        thm.xml
        • Path C:\Windows\TEMP\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\thm.xml
        • Size 11KB
        • SHA256 82f5f0e8a5f851af979675b7f726cc1948e0dece2e7def0f588c72dd04fdace9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        wixstdba.exe
        • Path C:\Windows\Temp\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.ba\wixstdba.exe
        • Size 431KB
        • SHA256 e9aad13949cd910523bf9547fc5c23bd2c26595e024809a9f8fa866c8d8e555b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dotnet-runtime-10.0.11-win-x64.exe
        • Path C:\Windows\Temp\{4DE9E04A-9A62-47AA-8222-64A44FDCAAF2}\.be\dotnet-runtime-10.0.11-win-x64.exe
        • Size 978KB
        • SHA256 83e80d2845801a685db318bc3540c300da5ec070ce888c4e1cfae0dbb9d184f5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1000-351-0x000001CB90A20000-0x000001CB913C4000-memory.dmp
        Download

        memory/3548-0-0x0000000000C70000-0x0000000000D55000-memory.dmp
        Download

        memory/3548-8-0x0000000000C70000-0x0000000000D55000-memory.dmp
        Download

        memory/5108-66-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-9-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-12-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-6-0x0000000001570000-0x0000000001571000-memory.dmp
        Download

        memory/5108-192-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-10-0x0000000001570000-0x0000000001571000-memory.dmp
        Download

        memory/5108-466-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-475-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5108-492-0x0000000000030000-0x0000000000470000-memory.dmp
        Download

        memory/5184-155-0x0000000000930000-0x00000000009F6000-memory.dmp
        Download