Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winupdater' = 'C:\Windupdt\winupdate.exe'
- [<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,C:\Windupdt\winupdate.exe'
Malicious functions
To bypass firewall, removes or modifies the following registry keys
- [<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Security Center
blocks the following features:
- User Account Control (UAC)
- Windows Security Center
Injects code into
the following system processes:
- %WINDIR%\syswow64\explorer.exe
- %WINDIR%\syswow64\notepad.exe
Modifies file system
Creates the following files
- %TEMP%\crypted.exe
- C:\windupdt\winupdate.exe
Network activity
Connects to
- '255.255.255.255':999
- '255.255.255.255':99
- '255.255.255.255':81
- 'localhost':81
- 'localhost':99
- 'localhost':999
UDP
- DNS ASK fl####n74.no-ip.biz
Miscellaneous
Searches for the following windows
- ClassName: '#32770' WindowName: 'Program Manager'
- ClassName: '#32770' WindowName: ''
Creates and executes the following
- '%TEMP%\crypted.exe'
- '%WINDIR%\syswow64\notepad.exe' ' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\notepad.exe'
- '%WINDIR%\syswow64\explorer.exe'