Win32.HLLW.Autoruner2.36254

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /U'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /R'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /C'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /N'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /j'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /w'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /Q'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /m'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /V'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /I'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /K'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /f'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /g'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /o'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /d'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /H'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /E'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /t'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /p'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /B'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /L'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /A'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /z'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /Y'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /S'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mjnoef' = '%HOMEPATH%\mjnoef.exe /x'

Creates the following files on removable media:

<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\mjnoef.exe
<Drive name for removable media>:\Secret.exe
<Drive name for removable media>:\Sexy.exe
<Drive name for removable media>:\RCX1.tmp

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%\mjnoef.exe

Sets the 'hidden' attribute to the following files:

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

Deletes the following files:

<Drive name for removable media>:\Sexy.exe

Substitutes the following files:

<Drive name for removable media>:\Sexy.exe

Network activity:

Connects to:

'ns#.##ayer1352.com':8000

UDP:

DNS ASK ns#.##ayer1352.com

Miscellaneous:

Creates and executes the following:

'%HOMEPATH%\mjnoef.exe'

Technologies

Terminology

Training and education

Myths

Technical Information