Win32.HLLW.Autoruner2.19173

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /g'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /s'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /d'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /m'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /u'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /b'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /i'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /n'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /l'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /o'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /w'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /h'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /c'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /x'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /r'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /k'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /t'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /y'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /p'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /v'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /a'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /j'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /q'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /e'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /z'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'krbuix' = '%HOMEPATH%\krbuix.exe /f'

Creates the following files on removable media:

<Drive name for removable media>:\Passwords.exe
<Drive name for removable media>:\RCX3.tmp
<Drive name for removable media>:\RCX2.tmp
<Drive name for removable media>:\RCX6.tmp
<Drive name for removable media>:\RCX5.tmp
<Drive name for removable media>:\RCX4.tmp
<Drive name for removable media>:\Secret.exe
<Drive name for removable media>:\krbuix.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\Porn.exe
<Drive name for removable media>:\RCX1.tmp
<Drive name for removable media>:\Sexy.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%\krbuix.exe'

Executes the following:

'<SYSTEM32>\wbem\wmiadap.exe' /R /T

Modifies file system :

Creates the following files:

%HOMEPATH%\krbuix.exe

Sets the 'hidden' attribute to the following files:

<Drive name for removable media>:\krbuix.exe
<Drive name for removable media>:\autorun.inf
%HOMEPATH%\krbuix.exe

Deletes the following files:

<SYSTEM32>\wbem\Performance\WmiApRpl.ini
<SYSTEM32>\PerfStringBackup.TMP
<Drive name for removable media>:\Passwords.exe
<Drive name for removable media>:\Sexy.exe
<Drive name for removable media>:\Porn.exe

Network activity:

Connects to:

'ns#.##siczipz.com':8003

UDP:

DNS ASK ns#.##siczipz.com

Miscellaneous:

Searches for the following windows:

ClassName: 'Indicator' WindowName: ''

Technologies

Terminology

Training and education

Myths

Technical Information