Skulls How to fix this mobile threat

 

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Skulls is a highly destructive mobile Trojan program. It may arrive on a phone disguised as an installer for normal applications or theme packages. Some known names it may use include the following:

Extended Theme.sis
ICONS.sis

When these malicious SIS packages are executed, they overwrite normal application files in the device’s C drive with damaged copies. Some of the popular applications it disables in this way include the following:

C:\System\Apps\Voicerecorder\Voicerecorder.app
C:\System\Apps\Voicerecorder\Voicerecorder.aif
C:\System\Apps\Vm\Vm.app
C:\System\Apps\Vm\Vm.aif
C:\System\Apps\VCommand\VCommand.app
C:\System\Apps\VCommand\VCommand.aif
C:\System\Apps\Ussd\Ussd.app
C:\System\Apps\Ussd\Ussd.aif
C:\System\Apps\ToDo\ToDo.app
C:\System\Apps\ToDo\ToDo.aif
C:\System\Apps\SysAp\SysAp.app
C:\System\Apps\SysAp\SysAp.aif
C:\System\Apps\Startup\Startup.app
C:\System\Apps\Startup\Startup.aif
C:\System\Apps\Speeddial\Speeddial.app
C:\System\Apps\Speeddial\Speeddial.aif
C:\System\Apps\SmsViewer\SmsViewer.app
C:\System\Apps\SmsViewer\SmsViewer.aif
C:\System\Apps\SmsEditor\SmsEditor.app
C:\System\Apps\SmsEditor\SmsEditor.aif
C:\System\Apps\SimDirectory\SimDirectory.app
C:\System\Apps\SimDirectory\SimDirectory.aif
C:\System\Apps\Sdn\Sdn.app
C:\System\Apps\Sdn\Sdn.aif
C:\System\Apps\ScreenSaver\ScreenSaver.app
C:\System\Apps\ScreenSaver\ScreenSaver.aif
C:\System\Apps\SchemeApp\SchemeApp.app
C:\System\Apps\SchemeApp\SchemeApp.aif
C:\System\Apps\Satui\Satui.app
C:\System\Apps\Satui\Satui.aif
C:\System\Apps\PushViewer\PushViewer.app
C:\System\Apps\PushViewer\PushViewer.aif
C:\System\Apps\PSLN\PSLN.app
C:\System\Apps\PSLN\PSLN.aif
C:\System\Apps\ProvisioningCx\ProvisioningCx.app
C:\System\Apps\ProvisioningCx\ProvisioningCx.aif
C:\System\Apps\ProfileApp\profileapp.app
C:\System\Apps\ProfileApp\profileapp.aif
C:\System\Apps\PRESENCE\PRESENCE.APP
C:\System\Apps\PRESENCE\PRESENCE.AIF
C:\System\Apps\Pinboard\Pinboard.app
C:\System\Apps\Pinboard\Pinboard.aif
C:\System\Apps\Phonebook\Phonebook.app
C:\System\Apps\Phonebook\Phonebook.aif
C:\System\Apps\Phone\Phone.app
C:\System\Apps\Phone\Phone.aif
C:\System\Apps\NSmlDSSync\NSmlDSSync.app
C:\System\Apps\NSmlDSSync\NSmlDSSync.aif
C:\System\Apps\NSmlDMSync\NSmlDMSync.app
C:\System\Apps\NSmlDMSync\NSmlDMSync.aif
C:\System\Apps\NpdViewer\NpdViewer.app
C:\System\Apps\NpdViewer\NpdViewer.aif
C:\System\Apps\Notepad\Notepad.app
C:\System\Apps\Notepad\notepad.aif
C:\System\Apps\MusicPlayer\MusicPlayer.app
C:\System\Apps\MusicPlayer\MusicPlayer.aif
C:\System\Apps\MsgMailViewer\MsgMailViewer.app
C:\System\Apps\MsgMailViewer\MsgMailViewer.aif
C:\System\Apps\MsgMailEditor\MsgMailEditor.app
C:\System\Apps\MsgMailEditor\MsgMailEditor.aif
C:\System\Apps\MmsViewer\MmsViewer.app
C:\System\Apps\MmsViewer\MmsViewer.aif
C:\System\Apps\MmsEditor\MmsEditor.app
C:\System\Apps\MmsEditor\MmsEditor.aif
C:\System\Apps\MMM\MMM.app
C:\System\Apps\MMM\Mmm.aif
C:\System\Apps\mmcapp\mmcapp.app
C:\System\Apps\mmcapp\mmcapp.aif
C:\System\Apps\Menu\Menu.app
C:\System\Apps\Menu\Menu.aif
C:\System\Apps\MediaSettings\MediaSettings.app
C:\System\Apps\MediaSettings\MediaSettings.aif
C:\System\Apps\MediaPlayer\MediaPlayer.app
C:\System\Apps\MediaPlayer\MediaPlayer.aif
C:\System\Apps\MediaGallery\MediaGallery.app
C:\System\Apps\MediaGallery\MediaGallery.aif
C:\System\Apps\mce\mce.app
C:\System\Apps\mce\mce.aif
C:\System\Apps\Logs\Logs.app
C:\System\Apps\Logs\Logs.aif
C:\System\Apps\location\location.app
C:\System\Apps\location\location.aif
C:\System\Apps\ImageViewer\ImageViewer.app
C:\System\Apps\ImageViewer\ImageViewer.aif
C:\System\Apps\GS\gs.app
C:\System\Apps\GS\GS.aif
C:\System\Apps\FileManager\FileManager.app
C:\System\Apps\FileManager\FileManager.aif
C:\System\Apps\DdViewer\DdViewer.app
C:\System\Apps\DdViewer\DdViewer.aif
C:\System\Apps\cshelp\cshelp.app
C:\System\Apps\cshelp\cshelp.aif
C:\System\Apps\Converter\converter.app
C:\System\Apps\Converter\Converter.aif
C:\System\Apps\ConnectionMonitorUi\ConnectionMonitorUi.app
C:\System\Apps\ConnectionMonitorUi\ConnectionMonitorUi.aif
C:\System\Apps\CodViewer\CodViewer.app
C:\System\Apps\CodViewer\CodViewer.aif
C:\System\Apps\ClockApp\ClockApp.app
C:\System\Apps\ClockApp\ClockApp.aif
C:\System\Apps\Chat\Chat.app
C:\System\Apps\Chat\Chat.aif
C:\System\Apps\CERTSAVER\CERTSAVER.APP
C:\System\Apps\CERTSAVER\CERTSAVER.AIF
C:\System\Apps\CbsUiApp\CbsUiApp.app
C:\System\Apps\CbsUiApp\cbsuiapp.aif
C:\System\Apps\CamTimer\camtimer.rsc
C:\System\Apps\CamTimer\camtimer.app
C:\System\Apps\Camcorder\Camcorder.app
C:\System\Apps\Camcorder\Camcorder.aif
C:\System\Apps\Calendar\Calendar.app
C:\System\Apps\Calendar\Calendar.aif
C:\System\Apps\Calcsoft\Calcsoft.app
C:\System\Apps\Calcsoft\Calcsoft.aif
C:\System\Apps\bva\bva.app
C:\System\Apps\bva\bva.aif
C:\System\Apps\BtUi\BtUi.app
C:\System\Apps\BtUi\BtUi.aif
C:\System\Apps\Browser\Browser.app
C:\System\Apps\Browser\Browser.aif
C:\System\Apps\Autolock\Autolock.app
C:\System\Apps\Autolock\Autolock.aif
C:\System\Apps\AppMngr\Appmngr.app
C:\System\Apps\AppMngr\AppMngr.aif
C:\System\Apps\AppInst\Appinst.app
C:\System\Apps\AppInst\Appinst.aif
C:\System\Apps\About\About.app
C:\System\Apps\About\About.aif

A trademark of the Skulls family of mobilewares is that it replaces the icon of all the disabled application with a skulls and crossbones image (some variant may use different images, such as that of a jigsaw piece).

SymbOS/Skulls affects phones running the Symbian S60 platform. Some affected phones include the following:

Nokia 3650, 3600
Nokia 3660, 3620
Nokia 6600
Nokia 6620
Nokia 7610
Nokia 7650
Nokia N-Gage
Panasonic X700
Sendo X
Siemens SX1

Other Details

SymbOS/Skulls may also drop and execute other mobilewares, such as SymbOS/Cabir, in the affected phone.

Some variants also drop DLL, ZIP, or RAR files that when opened actually contain different strings. Some known strings are:

T-VIRUS Notification.

T(heme) Virus for 7610
I hope you like it :)

==============================

What is T-VIRUS hideout?
ask your self...

==============================

Why do T-VIRUS created?
Cuz i love you so much... :)

==============================

Why do T-VIRUS belongs in this world?
Cuz i hate you very much... :)

==============================
Why do T-VIRUS infect phones?
Cuz it loves your phone very much... :)

Manual Disinfection

To disinfect a compromised device, it is necessary to reinstall all overwritten applications. The SymbOS/Skulls SIS installer must then be deleted. If this does not restore the phone, a formatting the phone may be necessary. All data saved in the C drive will be lost during a format.

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