Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Yahoo Messengger' = '<SYSTEM32>\winfiles.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe winfiles.exe'
Creates or modifies the following files:
- %WINDIR%\Tasks\At1.job
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\winfiles.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
blocks the following features:
- System Restore (SR)
Creates and executes the following:
- '%WINDIR%\winnt.exe'
Executes the following:
- '<SYSTEM32>\at.exe' 09:00 /interactive /EVERY:m,t,w,th,f,s,su <SYSTEM32>\winfiles.exe
- '<SYSTEM32>\at.exe' /delete /yes
Injects code into
the following system processes:
- <SYSTEM32>\svchost.exe
Terminates or attempts to terminate
the following system processes:
- <SYSTEM32>\cmd.exe
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
- %TEMP%\4683C.dmp
- %TEMP%\4AF76.dmp
- %TEMP%\44F84.dmp
- %TEMP%\43852.dmp
- %TEMP%\440DE.dmp
- %TEMP%\5BC14.dmp
- %TEMP%\5C4CE.dmp
- %TEMP%\5AE0A.dmp
- %TEMP%\4BEB8.dmp
- %TEMP%\56FC8.dmp
- %TEMP%\3FC72.dmp
- %WINDIR%\winnt.exe
- %TEMP%\dw.log
- %TEMP%\aut1.tmp
- <SYSTEM32>\winfiles.exe
- %WINDIR%\winfiles.exe
- <SYSTEM32>\setting.ini
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\setting[1].nql
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\setting[1].nql
- <SYSTEM32>\autorun.ini
- %TEMP%\30E59.dmp
Sets the 'hidden' attribute to the following files:
- <SYSTEM32>\setting.ini
- <Drive name for removable media>:\autorun.inf
- <SYSTEM32>\autorun.ini
- <SYSTEM32>\winfiles.exe
- %WINDIR%\winfiles.exe
Deletes the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\winfiles.exe
- %TEMP%\aut1.tmp
Network activity:
Connects to:
- 'nh#####nglane4.t35.com':80
- 'nh#####nglane3.t35.com':80
TCP:
HTTP GET requests:
- nh#####nglane4.t35.com/setting.nql
- nh#####nglane3.t35.com/setting.nql
UDP:
- DNS ASK nh#####nglane4.t35.com
- DNS ASK nh#####nglane3.t35.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
