Win32.HLLW.Autoruner2.2531
Added to the Dr.Web virus database:
2014-01-24
Virus description added:
2014-01-24
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Update' = '%APPDATA%\WindowsUpdate.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\Sys.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
- '%APPDATA%\Pin.exe'
- '%HOMEPATH%\utopred.exe'
Executes the following:
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe'
Injects code into
the following system processes:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe
Modifies file system :
Creates the following files:
- %TEMP%\2EE9C.dmp
- %APPDATA%\uTorrent\settings.dat.new
- %APPDATA%\Microsoft\Protect\S-1-5-21-2052111302-484763869-725345543-1003\Preferred
- %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-2052111302-484763869-725345543-1003\1f91d2d17ea675d4c2c3192e241743f9_23ef5514-3059-436f-a4a7-4cefaab20eb1
- %HOMEPATH%\Cookies\%USERNAME%@localhost[1].txt
- %TEMP%\3D2B2.dmp
- %HOMEPATH%\Cookies\%USERNAME%@localhost[2].txt
- %TEMP%\utt3.tmp.new
- %APPDATA%\uTorrent\toolbar.benc.new
- %TEMP%\dw.log
- %APPDATA%\pid.txt
- %TEMP%\aut1.tmp
- %HOMEPATH%\utopred.exe
- %APPDATA%\pidloc.txt
- %APPDATA%\Microsoft\Protect\S-1-5-21-2052111302-484763869-725345543-1003\9ae87521-4923-4572-9fc3-7fbfea528c7f
- %APPDATA%\WindowsUpdate.exe
- %APPDATA%\Pin.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Sys.exe
- <Drive name for removable media>:\autorun.inf
- %HOMEPATH%\utopred.exe
Deletes the following files:
- %HOMEPATH%\Cookies\%USERNAME%@localhost[2].txt
- %HOMEPATH%\Cookies\%USERNAME%@localhost[1].txt
- %TEMP%\aut1.tmp
Moves the following files:
- from %APPDATA%\uTorrent\toolbar.benc.new to %APPDATA%\uTorrent\toolbar.benc
- from %TEMP%\utt3.tmp.new to %TEMP%\utt3.tmp
- from %APPDATA%\uTorrent\settings.dat.new to %APPDATA%\uTorrent\settings.dat
Network activity:
Connects to:
- 'be###.utorrent.com':80
- 'localhost':1041
- 'sm##.gmail.com':587
TCP:
HTTP POST requests:
- be###.utorrent.com/e?i=##
UDP:
- DNS ASK wp#d
- DNS ASK pa###bin.com
- DNS ASK up####.utorrent.com
- DNS ASK sm##.gmail.com
- DNS ASK be###.utorrent.com
Miscellaneous:
Searches for the following windows:
- ClassName: '?Torrent4823DF041B09' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
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