ThreatExpert Report: Win32.Virut.Gen, Virus.Win32.Virut.n, W32.Virut.B, W32/Virut.gen, PE

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Submission Summary:

Submission details:

Submission received: 2 January 2009, 09:23:31
Processing time: 7 min 4 sec
Submitted sample:

File MD5: 0x8CACCCAEE3DCC30DEE8249A9914CF583
File SHA-1: 0x359DC70AD61459B52554F08122F121BB88F3CFB9
Filesize: 38,400 bytes
Alias:

Win32.Virut.Gen [PCTools]
W32.Virut.B [Symantec]
Virus.Win32.Virut.n [Kaspersky Lab]
W32/Virut.gen [McAfee]
PE_VIRUT.D [Trend Micro]
W32/Vetor-A [Sophos]
Virus:Win32/Virut.AK [Microsoft]
Virus.Win32.Cheburgen.a [Ikarus]

Summary of the findings:

What's been found	Severity Level
Communication with a remote IRC server.
Creates a startup registry entry.
There were some system executable files modified, which might indicate the presence of a PE-file infector.
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat categories were identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
	A virus capable to modify other files by infecting, prepending, or overwriting them them with its own body

File System Modifications

The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%UserProfile%\reader_s.exe %System%\reader_s.exe [file and pathname of the sample #1]	38,400 bytes	MD5: 0x8CACCCAEE3DCC30DEE8249A9914CF583 SHA-1: 0x359DC70AD61459B52554F08122F121BB88F3CFB9	Win32.Virut.Gen [PCTools] W32.Virut.B [Symantec] Virus.Win32.Virut.n [Kaspersky Lab] W32/Virut.gen [McAfee] PE_VIRUT.D [Trend Micro] W32/Vetor-A [Sophos] Virus:Win32/Virut.AK [Microsoft] Virus.Win32.Cheburgen.a [Ikarus]

Notes:

%UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (Windows NT/2000/XP).
%System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

The following files were modified:

[pathname with a string SHARE]\msinfo32.exe
[pathname with a string SHARE]\sapisvr.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwconn1.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwconn2.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwrmind.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\icwtutor.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\inetwiz.exe
%ProgramFiles%\Internet Explorer\Connection Wizard\isignup.exe
%ProgramFiles%\Internet Explorer\iedw.exe
%ProgramFiles%\Internet Explorer\IEXPLORE.EXE
%ProgramFiles%\MSN\MSNIA\msniasvc.exe
%ProgramFiles%\MSN\MSNIA\prestp.exe
%ProgramFiles%\MSN\MsnInstaller\msninst.exe
%ProgramFiles%\NetMeeting\cb32.exe
%ProgramFiles%\NetMeeting\conf.exe
%ProgramFiles%\NetMeeting\wb32.exe
%ProgramFiles%\Outlook Express\msimn.exe
%ProgramFiles%\Outlook Express\oemig50.exe
%ProgramFiles%\Outlook Express\setup50.exe
%ProgramFiles%\Outlook Express\wab.exe
%ProgramFiles%\Outlook Express\wabmig.exe
%ProgramFiles%\Web Publish\WPWIZ.EXE
%ProgramFiles%\Windows Media Player\migrate.exe
%ProgramFiles%\Windows Media Player\mplayer2.exe
%ProgramFiles%\Windows Media Player\setup_wm.exe
%ProgramFiles%\Windows Media Player\wmplayer.exe
%ProgramFiles%\Windows NT\Accessories\wordpad.exe
%ProgramFiles%\Windows NT\dialer.exe
%ProgramFiles%\Windows NT\hypertrm.exe
%ProgramFiles%\Windows NT\Pinball\PINBALL.EXE
%Windir%\hh.exe
%Windir%\inf\unregmp2.exe
%Windir%\Installer\{350C97B0-3D7C-4EE8-BAA9-00BCB3D54227}\places.exe
%Windir%\Microsoft.NET\Framework\NETFXSBS10.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_compiler.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_regbrowsers.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_regsql.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\CasPol.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\dfsvc.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\IEExec.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\jsc.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
%Windir%\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
%Windir%\msagent\agentsvr.exe
%Windir%\mui\muisetup.exe
%Windir%\NOTEPAD.EXE
%Windir%\pchealth\helpctr\binaries\HelpCtr.exe
%Windir%\pchealth\helpctr\binaries\HelpHost.exe
%Windir%\pchealth\helpctr\binaries\HelpSvc.exe
%Windir%\pchealth\helpctr\binaries\HscUpd.exe
%Windir%\pchealth\helpctr\binaries\msconfig.exe
%Windir%\pchealth\helpctr\binaries\notiflag.exe
%Windir%\pchealth\UploadLB\Binaries\UploadM.exe
%Windir%\regedit.exe
%System%\accwiz.exe
%System%\actmovie.exe
%System%\ahui.exe
%System%\arp.exe
%System%\asr_fmt.exe
%System%\asr_ldm.exe
%System%\asr_pfu.exe
%System%\at.exe
%System%\atmadm.exe
%System%\attrib.exe
%System%\auditusr.exe
%System%\blastcln.exe
%System%\bootcfg.exe
%System%\bootok.exe
%System%\bootvrfy.exe
%System%\cacls.exe
%System%\calc.exe
%System%\charmap.exe
%System%\chkdsk.exe
%System%\chkntfs.exe
%System%\cidaemon.exe
%System%\cipher.exe
%System%\cisvc.exe
%System%\ckcnv.exe
%System%\cleanmgr.exe
%System%\clean_all.exe
%System%\cliconfg.exe
%System%\clipbrd.exe
%System%\clipsrv.exe
%System%\cmd.exe
%System%\cmdl32.exe
%System%\cmmon32.exe
%System%\cmstp.exe
%System%\Com\comrepl.exe
%System%\Com\comrereg.exe
%System%\comp.exe
%System%\compact.exe
%System%\conime.exe
%System%\control.exe
%System%\convert.exe
%System%\cscript.exe
%System%\ctfmon.exe
%System%\dcomcnfg.exe
%System%\ddeshare.exe

Notes:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
reader_s.exe	%System%\reader_s.exe	N/A
reader_s.exe	%UserProfile%\reader_s.exe	N/A

There was a new memory page created in the address space of the system process(es):

Process Name	Process Filename	Allocated Size
svchost.exe	%System%\svchost.exe	4,096 bytes

Registry Modifications

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]

reader_s = "%System%\reader_s.exe"

so that reader_s.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

reader_s = "%UserProfile%\reader_s.exe"

so that reader_s.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows]

Device = "_#VMwareVirtualPrinter,winspool,TPVM:"

Other details

The following Host Names were requested from a host database:

panda-server.ru
proxim.ircgalaxy.pl

There were registered attempts to establish connection with the remote hosts. The connection details are:

Remote Host	Port Number
70.38.64.149	80
216.195.58.111	80
216.195.56.251	80
58.253.66.46	80
114.80.67.31	80
218.61.7.9	80
proxim.ircgalaxy.pl	65520

Outbound traffic (potentially malicious)

Attention! There was a new connection established with a remote IRC Server. The generated outbound IRC traffic is provided below:

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