Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /b'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /h'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /X'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /M'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'vousao' = '%HOMEPATH%\vousao.exe /e'
Creates the following files on removable media:
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Video.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\PYk.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\vousao.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\vousaox.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following:
- %HOMEPATH%\vousao.exe
Modifies file system :
Creates the following files:
- %HOMEPATH%\vousao.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\vousao.exe
- <Drive name for removable media>:\vousaox.exe
- <Drive name for removable media>:\PYk.ico
- %HOMEPATH%\vousao.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- 'ns#.##ayer1253.com':8000
UDP:
- DNS ASK ns#.##ayer1253.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
