Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Yahoo Messengger' = '<SYSTEM32>\gphone.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe gphone.exe'
Creates or modifies the following files:
- %WINDIR%\Tasks\At1.job
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\winlogon.exe' = '<SYSTEM32>\winlogon.exe:*:enabled:@shell32.dll,-1'
- <Auxiliary element>
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\SMRTNTKY.exe' = '%TEMP%\SMRTNTKY.exe:*:Enabled:ipsec'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
blocks the following features:
- User Account Control (UAC)
- Windows Security Center
Creates and executes the following:
- '<SYSTEM32>\DEFAULT_NOT_SET.exe'
- '%TEMP%\svchost.exe'
- '%TEMP%\SMRTNTKY.exe'
- '<SYSTEM32>\DEFAULT_NOT_SET.exe' (downloaded from the Internet)
Executes the following:
- '<SYSTEM32>\at.exe' /delete /yes
- '<SYSTEM32>\at.exe' 09:00 /interactive /EVERY:m,t,w,th,f,s,su <SYSTEM32>\gphone.exe
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /noconfig @"%TEMP%\wh8b3p02.cmdline"
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES2.tmp" "%TEMP%\vbc1.tmp"
Injects code into
the following system processes:
- <SYSTEM32>\cmd.exe
a large number of user processes.
Restores hooked functions in System Service Descriptor Table (SSDT).
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NofolderOptions' = '00000001'
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
- %TEMP%\Temporary Internet Files\Content.IE5\KF7H5W9K\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\P26F1N9M\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\Q1WTO7ID\desktop.ini
- <SYSTEM32>\autorun.ini
- %TEMP%\Temporary Internet Files\Content.IE5\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\Z58VO58D\desktop.ini
- %TEMP%\History\History.IE5\desktop.ini
- <SYSTEM32>\DEFAULT_NOT_SET.exe
- <DRIVERS>\mnloo.sys
- %TEMP%\winxjxk.exe
- %TEMP%\Temporary Internet Files\Content.IE5\Z58VO58D\setting[1].ini
- <SYSTEM32>\setting.ini
- %TEMP%\Temporary Internet Files\Content.IE5\KF7H5W9K\DEFAULT_NOT_SET[1].xls
- %TEMP%\winppkg.exe
- %TEMP%\O1BiL30.resources
- %TEMP%\MSNPSharp.dll
- %TEMP%\wh8b3p02.0.vb
- %TEMP%\kncyrj.resources
- %TEMP%\SMRTNTKY.exe
- %TEMP%\svchost.exe
- %TEMP%\wh8b3p02.cmdline
- %TEMP%\wh8b3p02.exe
- <SYSTEM32>\gphone.exe
- %WINDIR%\gphone.exe
- %TEMP%\wh8b3p02.out
- %TEMP%\vbc1.tmp
- %TEMP%\RES2.tmp
Sets the 'hidden' attribute to the following files:
- %TEMP%\Temporary Internet Files\Content.IE5\Q1WTO7ID\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\P26F1N9M\desktop.ini
- %TEMP%\History\History.IE5\desktop.ini
- <SYSTEM32>\DEFAULT_NOT_SET.exe
- <SYSTEM32>\setting.ini
- <SYSTEM32>\autorun.ini
- <SYSTEM32>\gphone.exe
- %TEMP%\Temporary Internet Files\Content.IE5\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\KF7H5W9K\desktop.ini
- %TEMP%\Temporary Internet Files\Content.IE5\Z58VO58D\desktop.ini
Deletes the following files:
- %TEMP%\wh8b3p02.0.vb
- %TEMP%\wh8b3p02.out
- %TEMP%\winppkg.exe
- %TEMP%\winxjxk.exe
- <DRIVERS>\mnloo.sys
- %TEMP%\wh8b3p02.exe
- %TEMP%\svchost.exe
- %TEMP%\SMRTNTKY.exe
- %TEMP%\RES2.tmp
- %TEMP%\wh8b3p02.cmdline
- %TEMP%\vbc1.tmp
Network activity:
Connects to:
- 'rn####.googlepages.com':80
- 'il#.#renz.pl':80
TCP:
HTTP GET requests:
- rn####.googlepages.com/DEFAULT_NOT_SET.xls
- rn####.googlepages.com/setting.ini
UDP:
- DNS ASK rn####.googlepages.com
- DNS ASK il#.#renz.pl
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
