Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /b'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /s'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /t'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /V'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /K'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /Z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'weicaoy' = '%HOMEPATH%\weicaoy.exe /R'
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>:\EyPL.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\weicaoy.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\weicaoyx.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%\weicaoy.exe'
Modifies file system :
Creates the following files:
- %HOMEPATH%\weicaoy.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\weicaoy.exe
- <Drive name for removable media>:\weicaoyx.exe
- <Drive name for removable media>:\EyPL.ico
- %HOMEPATH%\weicaoy.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- 'ns#.##ayer1532.com':8000
UDP:
- DNS ASK ns#.##ayer1532.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
