Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Windows Update System' = '%APPDATA%\winlogon.exe'
- [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Update System' = '%APPDATA%\winlogon.exe'
Creates the following files on removable media
- <Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\desktop.ini
- <Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\usbblock.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions
Injects code into
the following system processes:
- <SYSTEM32>\winlogon.exe
Modifies file system
Creates the following files
- %APPDATA%\explorer.exe
- %APPDATA%\winlogon.exe
- %TEMP%\google_cache2.tmp
Sets the 'hidden' attribute to the following files
- %APPDATA%\winlogon.exe
- <Drive name for removable media>:\gggkgkgaexrgyh\dfg-2352-26235-2322322-624621221-2622255\usbblock.exe
Network activity
UDP
- DNS ASK ga####585.no-ip.biz
Miscellaneous
Searches for the following windows
- ClassName: '' WindowName: 'Windows Security Alert'
- ClassName: '' WindowName: 'BitDefender Firewall Alert'
Creates and executes the following
- '%APPDATA%\explorer.exe'
- '%APPDATA%\winlogon.exe'
- '%APPDATA%\winlogon.exe' ' (with hidden window)
