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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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