Win32.HLLW.Autoruner.56586

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /e'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /n'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /t'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /D'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /r'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /k'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /Z'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /W'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /i'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /V'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /c'
[<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\3005545008] 'Name' = '"%TEMP%\2.tmp"'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Sxikihuvuw' = 'rundll32.exe "%WINDIR%\wmcaldi.dll",Startup'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /q'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /x'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /L'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /J'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'nkwum' = '%HOMEPATH%\nkwum.exe /H'

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>:\MoIN.ico
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\nkwum.exe
<Drive name for removable media>:\New Folder.lnk
<Drive name for removable media>:\nkwumx.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%\qond.exe
%HOMEPATH%\nkwum.exe
%HOMEPATH%\pond.exe
%HOMEPATH%\aspant.exe
%HOMEPATH%\OYFCF41EX1A8pM8D.exe

Executes the following:

<SYSTEM32>\rundll32.exe "%WINDIR%\wmcaldi.dll",iep
<SYSTEM32>\tasklist.exe
<SYSTEM32>\rundll32.exe "%WINDIR%\wmcaldi.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:

%TEMP%\1.tmp
%WINDIR%\wmcaldi.dll
%WINDIR%\Temp\3.tmp
%HOMEPATH%\nkwum.exe
%HOMEPATH%\aspant.dll
%HOMEPATH%\OYFCF41EX1A8pM8D.exe
%HOMEPATH%\aspant.exe
%HOMEPATH%\qond.exe
%HOMEPATH%\pond.exe

Sets the 'hidden' attribute to the following files:

<Drive name for removable media>:\nkwum.exe
<Drive name for removable media>:\nkwumx.exe
<Drive name for removable media>:\MoIN.ico
%HOMEPATH%\nkwum.exe
<Drive name for removable media>:\autorun.inf

Deletes the following files:

%WINDIR%\Temp\3.tmp
%HOMEPATH%\OYFCF41EX1A8pM8D.exe
%TEMP%\2.tmp
<DRIVERS>\etc\hosts

Deletes itself.

Miscellaneous:

Searches for the following windows:

ClassName: 'Indicator' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''

Technologies

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Training and education

Myths

Technical Information