Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe] 'Debugger' = 'avgvsm.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = 'ctfmon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\CACHE-46892452\data32.sys
- <Drive name for removable media>:\CACHE-46892452\Desktop.ini
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List] '<SYSTEM32>\avgvsm.exe' = '<SYSTEM32>\avgvsm.exe:*:Enabled:Windows Live'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\avgvsm.exe' = '<SYSTEM32>\avgvsm.exe:*:Enabled:Windows Live'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
blocks the following features:
- System Restore (SR)
- Windows Security Center
Creates and executes the following:
- <SYSTEM32>\avgvsm.exe
Executes the following:
- <SYSTEM32>\ipconfig.exe /flushdns
- <SYSTEM32>\ping.exe -n 2 0.0.0.0
Injects code into
the following system processes:
- %WINDIR%\Explorer.EXE
Terminates or attempts to terminate
the following user processes:
- GUARD.EXE
Searches for windows to
detect analytical utilities:
- ClassName: '' WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
- ClassName: '' WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
- ClassName: '' WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
detect programs and games:
- ClassName: 'MSBLWindowClass' WindowName: ''
Hides the following processes:
- <Full path to virus>
- <SYSTEM32>\avgvsm.exe
Modifies file system :
Creates the following files:
- <SYSTEM32>\avgvsm.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\CACHE-46892452\data32.sys
- <SYSTEM32>\avgvsm.exe
Deletes itself.
Network activity:
Connects to:
- 'ga#####r.dwn-adobe.info':9103
- 'sc####.srv-adobe.info':9899
UDP:
- DNS ASK ga#####r.dwn-adobe.info
- DNS ASK sc####.srv-adobe.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: '' WindowName: 'The Wireshark Network Analyzer'
