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Win32.HLLW.Autoruner1.35863
Added to the Dr.Web virus database:
2013-04-28
Virus description added:
2013-05-03
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /W'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /j'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /G'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /m'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /E'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /y'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /n'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /L'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /Z'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /K'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /C'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /Q'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /x'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /D'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /I'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /u'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /p'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /S'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /f'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /h'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /O'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /t'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /V'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /r'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /b'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoavuok' = '%HOMEPATH%\yoavuok.exe /A'
Creates the following files on removable media:
<Drive name for removable media>:\Pictures.lnk
<Drive name for removable media>:\Documents.lnk
<Drive name for removable media>:\Video.lnk
<Drive name for removable media>:\Music.lnk
<Drive name for removable media>:\Passwords.lnk
<Drive name for removable media>:\yoavuok.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\New Folder.lnk
<Drive name for removable media>:\yoavuokx.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
Modifies file system :
Creates the following files:
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\yoavuok.exe
<Drive name for removable media>:\yoavuokx.exe
%HOMEPATH%\yoavuok.exe
<Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
'ns#.##deconline.biz':8000
UDP:
DNS ASK ns#.##deconline.biz
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
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