Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command] '' = '"<LS_APPDATA>\yar.exe" -a "%PROGRAM_FILES%\Internet Explorer\iexplore.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = '<SYSTEM32>\ctfmon.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DisableNotifications' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
To complicate detection of its presence in the operating system,
blocks the following features:
- Windows Security Center
Creates and executes the following:
- <LS_APPDATA>\yar.exe -gav <Full path to virus>
Terminates or attempts to terminate
the following user processes:
- chrome.exe
- opera.exe
- iexplore.exe
- firefox.exe
Modifies file system :
Creates the following files:
- %TEMP%\25s5a1557o3a2533qy1xhcj32nc5qg56p53ov8gkd7l8h0r
- %HOMEPATH%\Templates\25s5a1557o3a2533qy1xhcj32nc5qg56p53ov8gkd7l8h0r
- %ALLUSERSPROFILE%\Application Data\25s5a1557o3a2533qy1xhcj32nc5qg56p53ov8gkd7l8h0r
- <LS_APPDATA>\yar.exe
- <LS_APPDATA>\25s5a1557o3a2533qy1xhcj32nc5qg56p53ov8gkd7l8h0r
Deletes itself.
Network activity:
Connects to:
- 'ka###akiduw.com':80
- 'qa###ekuzy.com':80
- 'ha####maduro.com':80
- 'pu###adajex.com':80
- 'di###emeb.com':80
- 'me####bugyluf.com':80
- 're####wanepexu.com':80
- 'vu###ewakoq.com':80
- 'pe###agyb.com':80
- 'mu####bugemiju.com':80
UDP:
- DNS ASK ry####bogociw.com
- DNS ASK ba###ybeqyk.com
- DNS ASK he####dacege.com
- DNS ASK la####popetaju.com
- DNS ASK mo###akib.com
- DNS ASK za###oqake.com
- DNS ASK ni####lybyhi.com
- DNS ASK xi###ymofi.com
- DNS ASK da####wydafa.com
- DNS ASK la####dumowa.com
- DNS ASK sa###uqurej.com
- DNS ASK microsoft.com
- DNS ASK je###ozis.com
- DNS ASK ji###eboza.com
- DNS ASK pe###ojuhep.com
- DNS ASK vu####girebymy.com
- DNS ASK va####sumuhor.com
- DNS ASK qa###ekuzy.com
- DNS ASK mu####bugemiju.com
- DNS ASK ha####maduro.com
- DNS ASK ka###akiduw.com
- DNS ASK me####bugyluf.com
- DNS ASK re####wanepexu.com
- DNS ASK pe###agyb.com
- DNS ASK vu###ewakoq.com
- DNS ASK la###ocot.com
- DNS ASK pi####gocide.com
- DNS ASK ci###ewytyl.com
- DNS ASK li####mezono.com
- DNS ASK pu###adajex.com
- DNS ASK di###emeb.com
- DNS ASK we####mysugamy.com
- DNS ASK la####tytudaxo.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'msascui_class' WindowName: ''
