Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /f'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /x'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /U'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /S'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /H'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /Z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /Q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /r'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /P'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vfyuul' = '%HOMEPATH%\vfyuul.exe /J'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\ZWUO.ico
- <Drive name for removable media>:\vfyuul.exe
- <Drive name for removable media>:\vfyuulx.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\Video.lnk
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Modifies file system:
Creates the following files:
- %HOMEPATH%\vfyuul.exe
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\vfyuul.exe
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\ZWUO.ico
- <Drive name for removable media>:\vfyuul.exe
- <Drive name for removable media>:\vfyuulx.exe
Network activity:
Connects to:
- 'ns#.##ayer1532.com':8000
UDP:
- DNS ASK ns#.##ayer1532.com
Miscellaneous:
Creates and executes the following:
- '%HOMEPATH%\vfyuul.exe'