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BackDoor.XWorm.421
Added to the Dr.Web virus database:
2025-09-15
Virus description added:
2025-09-16
Техническая информация
Для обеспечения автозапуска и распространения
Модифицирует следующие ключи реестра
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'win32svc' = '%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\x.exe'
[HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce] 'win32svc' = '%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\x.exe'
[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'win32svc' = '%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\x.exe'
[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Session AntiVirus' = 'C:\Users\Public\Windows Session AntiVirus.exe'
[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MipDlp' = 'C:\Users\Public\MipDlp.exe'
Создает или изменяет следующие файлы
%APPDATA%\microsoft\windows\start menu\programs\startup\win32svc.lnk
<SYSTEM32>\tasks\windows session antivirus
<SYSTEM32>\tasks\mipdlp
%APPDATA%\microsoft\windows\start menu\programs\startup\windows session antivirus.lnk
%APPDATA%\microsoft\windows\start menu\programs\startup\mipdlp.lnk
Вредоносные функции
Для затруднения выявления своего присутствия в системе
добавляет исключения антивируса:
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -WindowStyle Hidden -EncodedCommand QQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgACIAQwA6AFwAIgA=
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\Windows AntiVirus.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\Windows Session AntiVirus.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows AntiVirus.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Session AntiVirus.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Windows Session AntiVirus.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\MipDlp.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MipDlp.exe'
Изменения в файловой системе
Создает следующие файлы
%TEMP%\_mei28362\vcruntime140.dll
%TEMP%\_mei28362\_bz2.pyd
%TEMP%\_mei28362\_ctypes.pyd
%TEMP%\_mei28362\_decimal.pyd
%TEMP%\_mei28362\_hashlib.pyd
%TEMP%\_mei28362\_lzma.pyd
%TEMP%\_mei28362\_socket.pyd
%TEMP%\_mei28362\base_library.zip
%TEMP%\_mei28362\libcrypto-3.dll
%TEMP%\_mei28362\libffi-8.dll
%TEMP%\_mei28362\python313.dll
%TEMP%\_mei28362\select.pyd
%TEMP%\_mei28362\startup.bat
%TEMP%\_mei28362\unicodedata.pyd
%TEMP%\_mei28362\x.exe.dead
nul
%ALLUSERSPROFILE%\microsoft\windows defender\support\x.exe.dead
%ALLUSERSPROFILE%\microsoft\windows defender\support\startup.bat
%ALLUSERSPROFILE%\microsoft\windows defender\support\x.exe
%ALLUSERSPROFILE%\microsoft\windows defender\support\create_shortcut.vbs
%LOCALAPPDATA%\microsoft\clr_v4.0\usagelogs\x.exe.log
%LOCALAPPDATA%\st-setup-1.8.16.exe
%LOCALAPPDATA%\windows session antivirus.exe
%LOCALAPPDATA%\windows antivirus.exe
%TEMP%\nsr8cfa.tmp
%TEMP%\nsr8cfb.tmp\modern-header.bmp
%TEMP%\nsr8cfb.tmp\modern-wizard.bmp
%TEMP%\nsr8cfb.tmp\nsdialogs.dll
C:\users\public\windows session antivirus.exe
C:\users\public\mipdlp.exe
Сетевая активность
Подключается к
'ip##pi.com':80
'as######-58548.portmap.io':58548
'pu########experience.gl.at.ply.gg':24397
TCP
Запросы HTTP GET
http://ip##pi.com/line/?fi############
UDP
DNS ASK ip##pi.com
DNS ASK pu########experience.gl.at.ply.gg
DNS ASK as######-58548.portmap.io
Другое
Создает и запускает на исполнение
'%ALLUSERSPROFILE%\microsoft\windows defender\support\x.exe'
'%LOCALAPPDATA%\st-setup-1.8.16.exe'
'%LOCALAPPDATA%\windows session antivirus.exe'
'%LOCALAPPDATA%\windows antivirus.exe'
'C:\users\public\mipdlp.exe'
'C:\users\public\windows session antivirus.exe'
Перезапускает анализируемый образец
Запускает на исполнение
'<SYSTEM32>\cmd.exe' /c "powershell -WindowStyle Hidden -EncodedCommand QQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgACIAQwA6AFwAIgA=" (со скрытым окном)
'<SYSTEM32>\cmd.exe' /c "%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\x.exe" (со скрытым окном)
'<SYSTEM32>\cmd.exe' /c "%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\startup.bat" (со скрытым окном)
'<SYSTEM32>\wscript.exe' "%ALLUSERSPROFILE%\Microsoft\Windows Defender\Support\create_shortcut.vbs"
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Session AntiVirus" /tr "C:\Users\Public\Windows Session AntiVirus.exe" (со скрытым окном)
'<SYSTEM32>\schtasks.exe' /create /f /RL HIGHEST /sc minute /mo 1 /tn "MipDlp" /tr "C:\Users\Public\MipDlp.exe" (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\Windows AntiVirus.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%LOCALAPPDATA%\Windows Session AntiVirus.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows AntiVirus.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Session AntiVirus.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Windows Session AntiVirus.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\MipDlp.exe' (со скрытым окном)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MipDlp.exe' (со скрытым окном)
Curing recommendations
Windows
macOS
Linux
Android
If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space .
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
Switch off your device and turn it on as normal.
Find out more about Dr.Web for Android
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