Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'AVG AntiVirus Scan' = 'avgscn.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\applaunch.exe
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\Desktop.ini
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- System Restore (SR)
Creates and executes the following:
- <SYSTEM32>\avgscn.exe
Executes the following:
- <SYSTEM32>\ipconfig.exe /flushdns
Injects code into
the following system processes:
- %WINDIR%\Explorer.EXE
Terminates or attempts to terminate
the following user processes:
- MCAGENT.EXE
- fsav32.exe
- fsav.exe
- zlclient.exe
- spidernt.exe
- nod32.exe
- bdagent.exe
- 360tray.exe
- GUARD.EXE
- Drweb32w.exe
- ClamWin.exe
- bdss.exe
Searches for windows to
detect programs and games:
- ClassName: 'MSBLWindowClass' WindowName: ''
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
Hides the following processes:
- <SYSTEM32>\avgscn.exe
Modifies file system :
Creates the following files:
- <SYSTEM32>\avgscn.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\RECYCLER\S-1-6-20-3802918391-3809376219-530039213-2313\applaunch.exe
- <SYSTEM32>\avgscn.exe
Deletes itself.
Network activity:
Connects to:
- 'bu###.##publicofskorea.info':5276
UDP:
- DNS ASK bu###.##publicofskorea.info
- '<Private IP address>':1035
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
