Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /K'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /H'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /c'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /r'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /a'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /g'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /o'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /u'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /N'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /L'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /S'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cuajo' = '%HOMEPATH%\cuajo.exe /x'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\ffhQ.ico
- <Drive name for removable media>:\cuajo.exe
- <Drive name for removable media>:\cuajox.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%\cuajo.exe
Sets the 'hidden' attribute to the following files:
- %HOMEPATH%\cuajo.exe
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\ffhQ.ico
- <Drive name for removable media>:\cuajo.exe
- <Drive name for removable media>:\cuajox.exe
Network activity:
Connects to:
- 'ns#.##ayer1532.com':8000
UDP:
- DNS ASK ns#.##ayer1532.com
Miscellaneous:
Creates and executes the following:
- '%HOMEPATH%\cuajo.exe'