Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'status' = 'thb'
- [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'winlogon' = '<SYSTEM32>\win.dll\win.exe <SYSTEM32>\win.dll\std.txt'
Creates the following files on removable media
- <Drive name for removable media>:\autorun.inf
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Modifies file system
Creates the following files
- %TEMP%\winthb\autorun.inf
- %WINDIR%\syswow64\win.dll\reproduce.txt
- %WINDIR%\syswow64\win.dll\reg.bkp\autorun.inf
- %WINDIR%\syswow64\win.dll\desktop.ini
- C:\autorun.inf
- C:\thb.ico
- %WINDIR%\syswow64\win.dll\dll.ico
- %WINDIR%\syswow64\win.dll\thb.ico
- %WINDIR%\syswow64\win.dll\icon.ico
- %WINDIR%\syswow64\win.dll\win.mp3
- %WINDIR%\syswow64\win.dll\drivelist.txt
- %WINDIR%\syswow64\win.dll\avgs.exe
- %WINDIR%\syswow64\win.dll\win.exe
- %TEMP%\winthb\win.mp3
- %TEMP%\winthb\win.exe
- %TEMP%\winthb\thb.ico
- %TEMP%\winthb\pathlist.txt
- %TEMP%\winthb\install.txt
- %TEMP%\winthb\icon.ico
- %TEMP%\winthb\drivelist.txt
- %TEMP%\winthb\dll.ico
- %TEMP%\winthb\avgs.exe
- %WINDIR%\syswow64\win.dll\std.txt
- %WINDIR%\syswow64\win.dll\script1.txt
Sets the 'hidden' attribute to the following files
- %TEMP%\winthb\autorun.inf
- %TEMP%\winthb\avgs.exe
- %TEMP%\winthb\dll.ico
- %TEMP%\winthb\drivelist.txt
- %TEMP%\winthb\icon.ico
- %TEMP%\winthb\install.txt
- %TEMP%\winthb\pathlist.txt
- %TEMP%\winthb\thb.ico
- %TEMP%\winthb\win.exe
- %TEMP%\winthb\win.mp3
- %WINDIR%\syswow64\win.dll\desktop.ini
- %WINDIR%\syswow64\win.dll\reg.bkp\autorun.inf
Miscellaneous
Searches for the following windows
- ClassName: 'EDIT' WindowName: ''
- ClassName: 'AutoHotkey' WindowName: '<SYSTEM32>\win.dll\std.txt - AutoHotkey v1.0.46.08'
- ClassName: 'AutoHotkey' WindowName: '<SYSTEM32>\win.dll\script1.txt - AutoHotkey v1.0.46.08'
- ClassName: 'AutoHotkey' WindowName: '<SYSTEM32>\win.dll\reproduce.txt - AutoHotkey v1.0.46.08'
Creates and executes the following
- '%TEMP%\winthb\win.exe' winthb\install.txt
- '%WINDIR%\syswow64\win.dll\avgs.exe' <SYSTEM32>\win.dll\std.txt
- '%WINDIR%\syswow64\win.dll\win.exe' <SYSTEM32>\win.dll\script1.txt
- '%WINDIR%\syswow64\win.dll\avgs.exe' <SYSTEM32>\win.dll\reproduce.txt
