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Trojan.DownLoader7.25104

Added to the Dr.Web virus database: 2012-11-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\prvdisk] 'Start' = '00000001'
  • [<HKLM>\SYSTEM\ControlSet001\Services\sgcloudupsrv] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\PolicyAgent] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
  • %TEMP%\nsrA.tmp\nsD.tmp sc start sgcloudupsrv
  • %CommonProgramFiles%\naviagou\sougoucloud.exe
  • %TEMP%\nsrA.tmp\nsB.tmp sc create sgcloudupsrv binpath= "%CommonProgramFiles%\naviagou\sougoucloud.exe" type= share start= auto displayname= "Navia Web Cache Services"
  • %TEMP%\nsrA.tmp\nsC.tmp sc description sgcloudupsrv "К№УГNavia CahceјјКхМṩЅшРР»ҐБЄНшдЇААФ¤¶БјУЛЩ·юОсЎЈИз№ыНЈЦ№ёГ·юОсЈ¬ФтјЖЛг»ъЅ«І»ѕЯ±ёХвР©јјКхМṩµДјУЛЩ№¦ДЬЎЈ"
  • %PROGRAM_FILES%\uynutbdea\un0709205600888.exe
  • %TEMP%\~nsu.tmp\Au_.exe _?=%PROGRAM_FILES%\uynutbdea\
  • %TEMP%\nsrA.tmp\nsE.tmp sc create prvdisk binpath= <SYSTEM32>\PrvMon\prvdisk.sys type= kernel start= system group= Base tag= yes
  • %TEMP%\nsb2.tmp\nsF.tmp cmd /c "<Current directory>\regdllt.bat"
  • %TEMP%\nsb2.tmp\ns5.tmp cmd /c "<Current directory>\regdllc.bat"
  • %TEMP%\nsb2.tmp\ns6.tmp sc start PolicyAgent
  • %TEMP%\nsb2.tmp\ns3.tmp cmd /c ipconfig /all >"<Current directory>\ip.txt"
  • %TEMP%\nsb2.tmp\ns4.tmp cmd /c arp -a >"<Current directory>\ft.txt"
  • %PROGRAM_FILES%\uynutbdea\octaravlnd.exe -file qggfon.txt
  • %PROGRAM_FILES%\uynutbdea\mysetup.exe
  • %TEMP%\nsb2.tmp\ns7.tmp sc config PolicyAgent start= auto
  • %TEMP%\nsb2.tmp\ns8.tmp "octaravlnd.exe" -file qggfon.txt
Executes the following:
  • <SYSTEM32>\sc.exe start sgcloudupsrv
  • <SYSTEM32>\sc.exe description sgcloudupsrv "К№УГNavia CahceјјКхМṩЅшРР»ҐБЄНшдЇААФ¤¶БјУЛЩ·юОсЎЈИз№ыНЈЦ№ёГ·юОсЈ¬ФтјЖЛг»ъЅ«І»ѕЯ±ёХвР©јјКхМṩµДјУЛЩ№¦ДЬЎЈ"
  • <SYSTEM32>\sc.exe create sgcloudupsrv binpath= "%CommonProgramFiles%\naviagou\sougoucloud.exe" type= share start= auto displayname= "Navia Web Cache Services"
  • <SYSTEM32>\cmd.exe /c "<Current directory>\regdllt.bat"
  • <SYSTEM32>\wscript.exe "%CommonProgramFiles%\naviagou\note.vbs"
  • <SYSTEM32>\sc.exe create prvdisk binpath= <SYSTEM32>\PrvMon\prvdisk.sys type= kernel start= system group= Base tag= yes
  • <SYSTEM32>\cmd.exe /c "<Current directory>\regdllc.bat"
  • <SYSTEM32>\arp.exe -a
  • <SYSTEM32>\ipconfig.exe /all
  • <SYSTEM32>\sc.exe config PolicyAgent start= auto
  • <SYSTEM32>\arp.exe -s 10.0.0.1 00-00-00-00-00-01 10.0.0.2
  • <SYSTEM32>\sc.exe start PolicyAgent
Modifies file system :
Creates the following files:
  • %CommonProgramFiles%\naviagou\suject.db
  • %CommonProgramFiles%\naviagou\sougoucloud.exe
  • %CommonProgramFiles%\naviagou\vison.txt
  • %CommonProgramFiles%\naviagou\config-n.xml
  • %CommonProgramFiles%\naviagou\config-s.xml
  • %CommonProgramFiles%\naviagou\prvdisk.sys
  • %PROGRAM_FILES%\Common\ppscode.dat
  • %PROGRAM_FILES%\uynutbdea\mysetup.exe
  • %TEMP%\nsb2.tmp\ns8.tmp
  • %CommonProgramFiles%\naviagou\note.txt
  • %CommonProgramFiles%\naviagou\ypac.txt
  • %CommonProgramFiles%\naviagou\sqlite3.dll
  • %TEMP%\nsrA.tmp\nsE.tmp
  • <SYSTEM32>\PrvMon\prvdisk.sys
  • %CommonProgramFiles%\naviagou\newsousuo.pac
  • %TEMP%\~nsu.tmp\Au_.exe
  • %TEMP%\nsb2.tmp\nsF.tmp
  • %CommonProgramFiles%\naviagou\note.vbs
  • %TEMP%\nsrA.tmp\nsExec.dll
  • %TEMP%\nsrA.tmp\System.dll
  • %TEMP%\nsrA.tmp\AccessControl.dll
  • %TEMP%\nsrA.tmp\nsD.tmp
  • %TEMP%\nsrA.tmp\nsC.tmp
  • %TEMP%\nsrA.tmp\nsB.tmp
  • %TEMP%\nsb2.tmp\InetLoad.dll
  • %TEMP%\nsb2.tmp\nsRandom.dll
  • %PROGRAM_FILES%\uynutbdea\un0709205600888.exe
  • <Current directory>\op.ini
  • %TEMP%\nsb2.tmp\nsplugin.dll
  • %TEMP%\nsb2.tmp\Internet.dll
  • %PROGRAM_FILES%\uynutbdea\reginfo.xml
  • %PROGRAM_FILES%\uynutbdea\s0001.xml
  • %PROGRAM_FILES%\uynutbdea\menu.xml
  • %PROGRAM_FILES%\uynutbdea\temp0709205600888.ini
  • %TEMP%\nsb2.tmp\System.dll
  • %PROGRAM_FILES%\uynutbdea\ser000.xml
  • <Current directory>\regdllc.bat
  • <Current directory>\ft.txt
  • %TEMP%\nsb2.tmp\ns4.tmp
  • %TEMP%\nsb2.tmp\ns7.tmp
  • %TEMP%\nsb2.tmp\ns6.tmp
  • %TEMP%\nsb2.tmp\ns5.tmp
  • %PROGRAM_FILES%\uynutbdea\qggfon.txt
  • <Current directory>\tx.ini
  • %PROGRAM_FILES%\uynutbdea\octaravlnd.exe
  • <Current directory>\ip.txt
  • %TEMP%\nsb2.tmp\ns3.tmp
  • %TEMP%\nsb2.tmp\nsExec.dll
Deletes the following files:
  • <Current directory>\ip.txt
  • %PROGRAM_FILES%\uynutbdea\octaravlnd.exe
  • <Current directory>\regdllc.bat
  • <Current directory>\ft.txt
  • %PROGRAM_FILES%\uynutbdea\s0001.xml
  • %PROGRAM_FILES%\uynutbdea\ser000.xml
  • %PROGRAM_FILES%\uynutbdea\reginfo.xml
  • %PROGRAM_FILES%\uynutbdea\menu.xml
  • %TEMP%\nsb2.tmp\nsplugin.dll
  • %TEMP%\nsb2.tmp\nsExec.dll
  • %TEMP%\nsb2.tmp\System.dll
  • %TEMP%\nsb2.tmp\nsRandom.dll
  • %TEMP%\nsb2.tmp\nsF.tmp
  • %CommonProgramFiles%\naviagou\note.vbs
  • %TEMP%\nsb2.tmp\Internet.dll
  • %TEMP%\nsb2.tmp\InetLoad.dll
  • %PROGRAM_FILES%\uynutbdea\mysetup.exe
  • %TEMP%\nsb2.tmp\ns6.tmp
  • %TEMP%\nsb2.tmp\ns5.tmp
  • %TEMP%\nsb2.tmp\ns8.tmp
  • %TEMP%\nsb2.tmp\ns7.tmp
  • <Current directory>\tx.ini
  • <Current directory>\op.ini
  • %TEMP%\nsb2.tmp\ns4.tmp
  • %TEMP%\nsb2.tmp\ns3.tmp
  • %TEMP%\nsrA.tmp\AccessControl.dll
  • %CommonProgramFiles%\naviagou\prvdisk.sys
  • %TEMP%\nsrA.tmp\System.dll
  • %TEMP%\nsrA.tmp\nsExec.dll
  • %TEMP%\nsrA.tmp\nsC.tmp
  • %TEMP%\nsrA.tmp\nsB.tmp
  • %TEMP%\nsrA.tmp\nsE.tmp
  • %TEMP%\nsrA.tmp\nsD.tmp
Network activity:
Connects to:
  • 'g.###ips.com':82
  • 'localhost':1040
  • 'm.###nong.com':888
  • 'www.39##.com':80
TCP:
HTTP GET requests:
  • www.39##.com/svr.asp?c=#######################################
UDP:
  • DNS ASK g.###ips.com
  • DNS ASK www.39##.com
  • DNS ASK m.###nong.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''

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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