Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,C:\Windupdt\winupdate.exe'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winupdater' = 'C:\Windupdt\winupdate.exe'
Malicious functions:
Creates and executes the following:
- %TEMP%\archivo2.exe
- C:\Windupdt\winupdate.exe
- %TEMP%\archivo1.exe
Executes the following:
- %WINDIR%\NOTEPAD.EXE
- %WINDIR%\explorer.exe
- <SYSTEM32>\notepad.exe
Modifies file system :
Creates the following files:
- C:\Windupdt\winupdate.exe
- %TEMP%\nsx2.tmp
- %TEMP%\archivo1.exe
- %TEMP%\archivo2.exe
Deletes the following files:
- %TEMP%\archivo1.exe
Network activity:
Connects to:
- 'ho####23.no-ip.org':3333
UDP:
- DNS ASK ho####23.no-ip.org
- '<Private IP address>':1035
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
