Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yaiibuv' = '%HOMEPATH%\yaiibuv.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Sxikihuvuw' = 'rundll32.exe "%WINDIR%\kbdigrat.dll",Startup'
- [<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\3693828104] 'Name' = '"%TEMP%\2.tmp"'
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>:\UHb.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yaiibuv.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\yaiibuvx.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%\sasta.exe
- %HOMEPATH%\yaiibuv.exe
- %HOMEPATH%\PeTL0ysAqe2Bj59lf7.exe
- %HOMEPATH%\rasta.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
- <SYSTEM32>\rundll32.exe "%WINDIR%\kbdigrat.dll",Startup
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] '1208' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1200' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1001' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '2000' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1405' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1209' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{A8A88C49-5EB2-4990-A1A2-0876022C854F}' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '{AEBA21FA-782A-4A90-978D-B72164C80120}' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1A10' = '00000000'
Modifies file system :
Creates the following files:
- %WINDIR%\kbdigrat.dll
- %HOMEPATH%\yaiibuv.exe
- %WINDIR%\Temp\3.tmp
- %TEMP%\1.tmp
- %HOMEPATH%\PeTL0ysAqe2Bj59lf7.exe
- %HOMEPATH%\rasta.exe
- %HOMEPATH%\sasta.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\yaiibuv.exe
- <Drive name for removable media>:\yaiibuvx.exe
- <Drive name for removable media>:\UHb.ico
- %HOMEPATH%\yaiibuv.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %WINDIR%\Temp\3.tmp
- %HOMEPATH%\PeTL0ysAqe2Bj59lf7.exe
- %TEMP%\2.tmp
- <DRIVERS>\etc\hosts
Deletes itself.
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
