Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /G'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /a'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /E'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /s'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /H'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /c'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /Y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /R'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /V'
- [<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\1955636688] 'Name' = '"%TEMP%\2.tmp"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /P'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /K'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /U'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /o'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'buenaos' = '%HOMEPATH%\buenaos.exe /x'
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>:\JJM.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\buenaos.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\buenaosx.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%\zmmon.exe
- %HOMEPATH%\spooldx.exe (downloaded from the Internet)
- %HOMEPATH%\buenaos.exe
- %HOMEPATH%\axsvr.exe
- %HOMEPATH%\ZKJxkNR73D83.exe
- %HOMEPATH%\zlmon.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
Injects code into
the following system processes:
- <SYSTEM32>\spoolsv.exe
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1A10' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{AEBA21FA-782A-4A90-978D-B72164C80120}' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{A8A88C49-5EB2-4990-A1A2-0876022C854F}' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'
Modifies file system :
Creates the following files:
- %TEMP%\1.tmp
- %HOMEPATH%\buenaos.exe
- %WINDIR%\Temp\3.tmp
- %HOMEPATH%\spooldx.exe
- %HOMEPATH%\axsvr.dll
- %HOMEPATH%\ZKJxkNR73D83.exe
- %HOMEPATH%\axsvr.exe
- %HOMEPATH%\zmmon.exe
- %HOMEPATH%\zlmon.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\buenaos.exe
- <Drive name for removable media>:\buenaosx.exe
- <Drive name for removable media>:\JJM.ico
- %HOMEPATH%\buenaos.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %WINDIR%\Temp\3.tmp
- %HOMEPATH%\ZKJxkNR73D83.exe
- %TEMP%\2.tmp
- <DRIVERS>\etc\hosts
Network activity:
Connects to:
- 'ag###roosi.com':80
TCP:
HTTP GET requests:
- ag###roosi.com/xxx
UDP:
- DNS ASK ag###roosi.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''
