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BackDoor.SpyBotNET.20
Added to the Dr.Web virus database:
2020-05-16
Virus description added:
2020-05-18
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Update' = '%TEMP%\Windows Updata\svchost.exe'
[<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,%TEMP%\Windows Updata\svchost.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Defender' = '%PROGRAMDATA%\InstallDir\svchost.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Windows Update' = '%PROGRAMDATA%\InstallDir\svchost.exe'
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Google Update' = '%PROGRAMDATA%\InstallDir\svchost.exe'
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Steam Client Bootstrapper' = '%PROGRAMDATA%\InstallDir\svchost.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'aaf8ee5db49e2bd3948fee2ac80945fe' = '"%TEMP%\svchost.exe" ..'
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'aaf8ee5db49e2bd3948fee2ac80945fe' = '"%TEMP%\svchost.exe" ..'
Creates or modifies the following files
%APPDATA%\microsoft\windows\start menu\programs\startup\steam client bootstrapper.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\aaf8ee5db49e2bd3948fee2ac80945fe.exe
<SYSTEM32>\tasks\stupdate
<SYSTEM32>\tasks\windows defender
Creates the following files on removable media
<Drive name for removable media>:\svchost.exe
<Drive name for removable media>:\autorun.inf
Malicious functions
To bypass firewall, removes or modifies the following registry keys
[<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Command Prompt (CMD)
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Windows Security Center
blocks the following features:
User Account Control (UAC)
Windows Security Center
Executes the following
'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%PROGRAMDATA%\InstallDir\svchost.exe" "svchost.exe" ENABLE
'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%TEMP%\svchost.exe" "svchost.exe" ENABLE
'%WINDIR%\syswow64\taskkill.exe' /F /IM Taskmgr.exe
Injects code into
the following system processes:
%WINDIR%\microsoft.net\framework\v2.0.50727\regasm.exe
the following user processes:
Modifies file system
Creates the following files
%TEMP%\svchost.exe
%WINDIR%\syswow64\svсѓhost.exe
D:\autorun.inf
C:\autorun.inf
D:\svchost.exe
C:\svchost.exe
%TEMP%\stupdate.exe
%PROGRAMDATA%\installdir\svchost.exe
%TEMP%\melt.txt
%APPDATA%\microsoft\svchost.exe
%TEMP%\windows updata\svchost.exe
%TEMP%\fckjosnkmc.txt
%TEMP%\svch0st.exe
%TEMP%\svГ±hГ®st.exe
%TEMP%\svГ±host.exe
%TEMP%\svchГ®st.exe
%WINDIR%\syswow64\windows\svсhost.exe
%APPDATA%\logs\05-16-2020
Sets the 'hidden' attribute to the following files
%TEMP%\svchost.exe
%TEMP%\windows updata\svchost.exe
%TEMP%\svchГ®st.exe
%TEMP%\svch0st.exe
C:\autorun.inf
D:\autorun.inf
<Drive name for removable media>:\svchost.exe
<Drive name for removable media>:\autorun.inf
%WINDIR%\syswow64\windows\svсhost.exe
Deletes the following files
%TEMP%\svchost.exe
%TEMP%\svГ±hГ®st.exe
Substitutes the following files
Network activity
Connects to
'ha#####aft.hopto.org':4444
TCP
UDP
DNS ASK ha#####aft.hopto.org
DNS ASK ip##pi.com
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: ''
Creates and executes the following
'%TEMP%\svchost.exe'
'%WINDIR%\syswow64\svсѓhost.exe'
'%APPDATA%\microsoft\svchost.exe'
'%TEMP%\windows updata\svchost.exe'
'%WINDIR%\syswow64\windows\svсhost.exe'
'%PROGRAMDATA%\installdir\svchost.exe'
'%TEMP%\svГ±host.exe'
'%TEMP%\svchГ®st.exe'
'%TEMP%\svch0st.exe'
'%TEMP%\svГ±hГ®st.exe'
'%WINDIR%\syswow64\cmd.exe' /k <SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f' (with hidden window)
'%WINDIR%\syswow64\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoControlPanel /t REG_DWORD /d 1 /f' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /k attrib "%TEMP%\svch0st.exe" +s +h' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /k attrib "%LOCALAPPDATA%\Temp" +s +h' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C attrib +s +h "%PROGRAMDATA%\InstallDir"' (with hidden window)
'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%PROGRAMDATA%\InstallDir\svchost.exe" "svchost.exe" ENABLE' (with hidden window)
'%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%TEMP%\svchost.exe" "svchost.exe" ENABLE' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /F /IM Taskmgr.exe' (with hidden window)
'%WINDIR%\syswow64\schtasks.exe' /create /sc minute /mo 1 /tn StUpdate /tr %LOCALAPPDATA%\Temp/StUpdate.exe' (with hidden window)
'%WINDIR%\syswow64\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoFolderOptions /t REG_DWORD /d 1 /f' (with hidden window)
Executes the following
'%WINDIR%\microsoft.net\framework\v2.0.50727\regasm.exe'
'%WINDIR%\syswow64\cmd.exe' /k attrib "%TEMP%\svch0st.exe" +s +h
'%WINDIR%\syswow64\cmd.exe' /k attrib "%LOCALAPPDATA%\Temp" +s +h
'%WINDIR%\syswow64\attrib.exe' "%TEMP%\svch0st.exe" +s +h
'%WINDIR%\syswow64\attrib.exe' "%LOCALAPPDATA%\Temp" +s +h
'%ProgramFiles(x86)%\internet explorer\iexplore.exe'
'%WINDIR%\syswow64\cmd.exe' /C attrib +s +h "%PROGRAMDATA%\InstallDir"
'%WINDIR%\syswow64\attrib.exe' +s +h "%PROGRAMDATA%\InstallDir"
'%WINDIR%\syswow64\schtasks.exe' /create /sc minute /mo 1 /tn StUpdate /tr %LOCALAPPDATA%\Temp/StUpdate.exe
'%WINDIR%\syswow64\cmd.exe' /k <SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
'%WINDIR%\syswow64\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoControlPanel /t REG_DWORD /d 1 /f
'%WINDIR%\syswow64\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoFolderOptions /t REG_DWORD /d 1 /f
'%WINDIR%\syswow64\schtasks.exe' /create /tn "Windows Defender" /sc ONLOGON /tr "%TEMP%\svГ±host.exe" /rl HIGHEST /f
'%WINDIR%\syswow64\schtasks.exe' /create /tn "Windows Defender" /sc ONLOGON /tr "%WINDIR%\SysWOW64\Windows\svсhost.exe" /rl HIGHEST /f
'<SYSTEM32>\taskeng.exe' {52E0BE05-E5E7-4AE7-B58D-BD9574A3205C} S-1-5-21-1960123792-2022915161-3775307078-1001:uzoxskrps\user:Interactive:[1]
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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