Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%APPDATA%\Update\Windows Update.exe,'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Update' = '%APPDATA%\Update\Windows Update.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Update' = '%APPDATA%\Update\Windows Update.exe'
Malicious functions:
Creates and executes the following:
- '%TEMP%\Windows Check 6.exe'
- '%TEMP%\Windows Check 1.exe'
Executes the following:
- '<SYSTEM32>\ntvdm.exe' -f -i3
- '<SYSTEM32>\ntvdm.exe' -f -i4
- '<SYSTEM32>\ntvdm.exe' -f -i1
- '<SYSTEM32>\ntvdm.exe' -f -i2
Modifies file system :
Creates the following files:
- %WINDIR%\Temp\scs6.tmp
- %WINDIR%\Temp\scs5.tmp
- %TEMP%\Windows Check 5.exe
- %TEMP%\Windows Check 6.exe
- %APPDATA%\Update\Windows Update.exe
- %WINDIR%\Temp\scs8.tmp
- %WINDIR%\Temp\scs7.tmp
- %WINDIR%\Temp\scs4.tmp
- %TEMP%\Windows Check 3.exe
- %TEMP%\Windows Check 2.exe
- %TEMP%\Windows Check 1.exe
- %WINDIR%\Temp\scs1.tmp
- %WINDIR%\Temp\scs3.tmp
- %WINDIR%\Temp\scs2.tmp
- %TEMP%\Windows Check 4.exe
Deletes the following files:
- %WINDIR%\Temp\scs6.tmp
- %WINDIR%\Temp\scs5.tmp
- %WINDIR%\Temp\scs8.tmp
- %WINDIR%\Temp\scs7.tmp
- %WINDIR%\Temp\scs4.tmp
- %WINDIR%\Temp\scs2.tmp
- %WINDIR%\Temp\scs3.tmp
- %WINDIR%\Temp\scs1.tmp
Network activity:
Connects to:
- 'ch####p.dyndns.org':80
- 'wp#d':80
TCP:
HTTP GET requests:
- ch####p.dyndns.org/
- wp#d/wpad.dat
UDP:
- DNS ASK ch####p.dyndns.org
- DNS ASK wp#d
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'VMDragDetectWndClass' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-bc4.bc8.3b0008'
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-b90.b94.380001'
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-ba4.ba8.390002'
- ClassName: 'ConsoleWindowClass' WindowName: 'ntvdm-bb4.bb8.3a0007'
