Win32.HLLW.Autoruner2.15520
Added to the Dr.Web virus database:
2014-06-12
Virus description added:
2014-06-19
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Winupdate' = '"%APPDATA%\explorer.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Winupdate' = '"%APPDATA%\explorer.exe" ..'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf.lnk
- <Drive name for removable media>:\youtube.avi.exe.lnk
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\Image1.jpeg.exe
- <Drive name for removable media>:\youtube.avi.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\explorer.exe' = '%APPDATA%\explorer.exe:*:Enabled:explorer.exe'
Creates and executes the following:
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\explorer.exe" "explorer.exe" ENABLE
Modifies file system :
Creates the following files:
- C:\autorun.inf
- C:\youtube.avi.exe
- %APPDATA%\explorer.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\youtube.avi.exe
- C:\autorun.inf
- <Drive name for removable media>:\Image1.jpeg.exe
Network activity:
Connects to:
UDP:
- DNS ASK sk####r.zapto.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
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