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Trojan.DownLoader6.58263

Added to the Dr.Web virus database: 2012-09-23

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\QuickDownload Update] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\QuickDownload Service] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\QuickDownload Agent] 'Start' = '00000002'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%PROGRAM_FILES%\QuickDownloadService\qdownservice.exe' = '%PROGRAM_FILES%\QuickDownloadService\qdownservice.exe:*:Enabled:QuickDownloadSvc'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%PROGRAM_FILES%\QuickDownloadService\qdownservice.exe' = '%PROGRAM_FILES%\QuickDownloadService\qdownservice.exe:*:Enabled:QuickDownloadService'
Creates and executes the following:
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "QuickDownload Update"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "QuickDownload Agent"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "QuickDownload Agent"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "QuickDownload Service"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "QuickDownload Service"
  • %PROGRAM_FILES%\QuickDownloadService\qdownservice.exe
  • %PROGRAM_FILES%\QuickDownloadService\qdownupdate.exe
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "QuickDownload Update"
  • %PROGRAM_FILES%\QuickDownloadService\qdownagent.exe
  • %PROGRAM_FILES%\QuickDownloadService\StopMegaService.exe
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "Mega Network Manager"
  • %TEMP%\is-JBQNP.tmp\<Virus name>.tmp /SL5="$30092,225503,54272,<Full path to virus>"
  • %PROGRAM_FILES%\QuickDownloadService\ElevationWrap.exe
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "Mega Network Manager"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "Mega Network Update"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "Mega Network Update"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe STOP "Mega Network Service"
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe DELETE "Mega Network Service"
Executes the following:
  • <SYSTEM32>\sc.exe FAILURE "QuickDownload Service" reset= 180 actions= "restart/180000/restart/180000/restart/180000"
  • <SYSTEM32>\sc.exe FAILURE "QuickDownload Agent" reset= 180 actions= "restart/180000/restart/180000/restart/180000"
  • <SYSTEM32>\sc.exe start "QuickDownload Update"
  • <SYSTEM32>\sc.exe FAILURE "QuickDownload Update" reset= 180 actions= "restart/180000/restart/180000/restart/180000"
  • <SYSTEM32>\sc.exe description "QuickDownload Update" "°нјУ ґЩїо·Оµе ј­єсЅєАЗ »уЕВё¦ ЗЧ»у ГЦ»уАё·О АЇБцЗП±в А§ЗС ѕчµҐАМЖ®ё¦ Б¦°шЗХґПґЩ"
  • <SYSTEM32>\sc.exe description "QuickDownload Service" "ДБЕЩГч ґЩїо·ОµеЅГ ґЩїо·Оµе јУµµ Зв»уА» А§ЗС ј­єсЅєё¦ Б¦°шЗХґПґЩ."
  • <SYSTEM32>\sc.exe description "QuickDownload Agent" "ДБЕЩГч ґЩїо·ОµеЅГ ґЩїо·Оµе јУµµ Зв»уА» А§ЗС ј­єсЅєё¦ Б¦°шЗХґПґЩ."
  • <SYSTEM32>\sc.exe create "QuickDownload Agent" binPath= "%PROGRAM_FILES%\QuickDownloadService\qdownagent.exe" start= auto error= ignore
  • <SYSTEM32>\netsh.exe firewall add allowedprogram "%PROGRAMFILES%\QuickDownloadService\qdownservice.exe" "QuickDownloadService" ENABLE
  • <SYSTEM32>\wscript.exe "%PROGRAM_FILES%\QuickDownloadService\Firewall.vbs"
  • <SYSTEM32>\sc.exe create "QuickDownload Service" binPath= "%PROGRAM_FILES%\QuickDownloadService\qdownservice.exe" start= auto error= ignore
  • <SYSTEM32>\sc.exe start "QuickDownload Service"
  • <SYSTEM32>\sc.exe start "QuickDownload Agent"
  • <SYSTEM32>\sc.exe create "QuickDownload Update" binPath= "%PROGRAM_FILES%\QuickDownloadService\qdownupdate.exe" start= auto error= ignore
Modifies file system :
Creates the following files:
  • %PROGRAM_FILES%\QuickDownloadService\conf\data3.cfg
  • %PROGRAM_FILES%\QuickDownloadService\unins000.dat
  • %PROGRAM_FILES%\QuickDownloadService\is-OV4KC.tmp
  • %PROGRAM_FILES%\QuickDownloadService\conf\is-GQKB4.tmp
  • %PROGRAM_FILES%\QuickDownloadService\conf\data4.cfg
  • C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\CJCTQ25G\maxuploadspeed[1].txt
  • %PROGRAM_FILES%\QuickDownloadService\maxuploadspeed.txt
  • %PROGRAM_FILES%\QuickDownloadService\conf\data2.cfg
  • %PROGRAM_FILES%\QuickDownloadService\conf\data6.tmp
  • %PROGRAM_FILES%\QuickDownloadService\conf\data2.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-FHGI9.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-C8SVP.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-2IKPT.tmp
  • %TEMP%\is-9OD5K.tmp\_isetup\_shfoldr.dll
  • %TEMP%\is-JBQNP.tmp\<Virus name>.tmp
  • %TEMP%\is-9OD5K.tmp\_isetup\_RegDLL.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-MMVGM.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-E9MSF.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-FSS1N.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-3Q5UR.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-UAV7Q.tmp
  • %PROGRAM_FILES%\QuickDownloadService\is-MJOLP.tmp
Deletes the following files:
  • %TEMP%\is-9OD5K.tmp\_isetup\_RegDLL.tmp
  • %PROGRAM_FILES%\QuickDownloadService\Firewall.vbs
  • %TEMP%\is-JBQNP.tmp\<Virus name>.tmp
  • %TEMP%\is-9OD5K.tmp\_isetup\_shfoldr.dll
  • %PROGRAM_FILES%\QuickDownloadService\conf\data2.tmp
  • %PROGRAM_FILES%\QuickDownloadService\conf\data6.tmp
  • %PROGRAM_FILES%\QuickDownloadService\sc.exe
  • %PROGRAM_FILES%\QuickDownloadService\StopMegaService.exe
Moves the following files:
  • from %PROGRAM_FILES%\QuickDownloadService\is-FSS1N.tmp to %PROGRAM_FILES%\QuickDownloadService\qdownagent.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-E9MSF.tmp to %PROGRAM_FILES%\QuickDownloadService\HoleAddon.dll
  • from %PROGRAM_FILES%\QuickDownloadService\is-FHGI9.tmp to %PROGRAM_FILES%\QuickDownloadService\qdownservice.exe
  • from %PROGRAM_FILES%\QuickDownloadService\conf\is-GQKB4.tmp to %PROGRAM_FILES%\QuickDownloadService\conf\Version.cfg
  • from %PROGRAM_FILES%\QuickDownloadService\is-OV4KC.tmp to %PROGRAM_FILES%\QuickDownloadService\qdownupdate.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-3Q5UR.tmp to %PROGRAM_FILES%\QuickDownloadService\sc.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-2IKPT.tmp to %PROGRAM_FILES%\QuickDownloadService\Firewall.vbs
  • from %PROGRAM_FILES%\QuickDownloadService\is-C8SVP.tmp to %PROGRAM_FILES%\QuickDownloadService\unins000.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-MMVGM.tmp to %PROGRAM_FILES%\QuickDownloadService\ElevationWrap.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-MJOLP.tmp to %PROGRAM_FILES%\QuickDownloadService\StopMegaService.exe
  • from %PROGRAM_FILES%\QuickDownloadService\is-UAV7Q.tmp to %PROGRAM_FILES%\QuickDownloadService\Firewall.exe
Network activity:
Connects to:
  • 'localhost':1040
  • 'in##cdn.com':80
  • '12#.#8.119.138':30555
  • 'sv##.#imesis.co.kr':30294
TCP:
HTTP GET requests:
  • in##cdn.com/service/maxuploadspeed.txt
UDP:
  • DNS ASK in##cdn.com
  • DNS ASK sv##.#imesis.co.kr
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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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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.

Find out more about Dr.Web for Android