Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /o'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /a'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /f'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /r'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /I'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /c'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /M'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /Q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /t'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /h'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /S'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /V'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /g'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /u'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /Z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /X'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kybef' = '%HOMEPATH%\kybef.exe /J'
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>:\sjfn.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\kybef.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\kybefx.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%\kybef.exe'
Executes the following:
- '<SYSTEM32>\wermgr.exe' -queuereporting
Modifies file system :
Creates the following files:
- %HOMEPATH%\kybef.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\kybef.exe
- <Drive name for removable media>:\kybefx.exe
- <Drive name for removable media>:\sjfn.ico
- %HOMEPATH%\kybef.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- '20#.#6.232.182':80
- 'download.windowsupdate.com':80
- 'ns#.##ayer1532.com':8000
UDP:
- DNS ASK download.windowsupdate.com
- DNS ASK do#####d.microsoft.com
- DNS ASK ns#.##ayer1532.com
- DNS ASK dn#.##ftncsi.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'