Virus Profile: W32/Expiro.gen.n!2FA7F31C7274

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 1/26/2013
Date Added: 1/26/2013
Origin: Unknown
Length: 237568
Type: Virus
Subtype: Win32
DAT Required: 6967
Removal Instructions
   
 
 
   

Description

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

   

Virus Characteristics

This is a Virus

File PropertiesProperty Values
McAfee DetectionW32/Expiro.gen.n
Length237568 bytes
MD52fa7f31c727468571cbdc30dfff4a156
SHA13d202a06d25907a9625b370e4b1065a2dbbe49e3


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareWin32.Expirio.A (B)
ahnlabWin32/Expiro4.Gen
AVG (GriSoft)Win32/Expiro
aviraW32/Expiro.AR
KasperskyVirus.Win32.Pioneer.br
BitDefenderWin32.Expirio.A
clamavWIN.Virus.Expiro
Dr.WebWin32.Expiro.44
F-ProtW32/Expiro.AB
MicrosoftVirus:Win32/Expiro.BA
SymantecW32.Xpiro.D
EsetWin32/Expiro.AG
normanw32/suspicious.c3!genr
risingWin32.Expiro.U
SophosW32/Expiro-H
Trend MicroPE_EXPIRO.ZZ
vba32SScope.Virus.Expiro.br
Vet (Computer Associates)Win32/Expiro.R

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Enumerates many system files and directories.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaW32/Expiro.gen.n
McAfee SupportedW32/Expiro.gen.n



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

3D202A06D25907A9625B370E4B1065A2DBBE49E3

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\netdde.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\ngenrootstorelock.dat
  • %WINDIR%\SYSTEM32\vssvc.exe
  • %WINDIR%\SYSTEM32\smlogsvc.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\ngenservicelock.dat
  • %WINDIR%\SYSTEM32\dmadmin.exe
  • %WINDIR%\SYSTEM32\locator.exe
  • %WINDIR%\SYSTEM32\sessmgr.exe
  • %WINDIR%\SYSTEM32\rsvp.exe
  • %WINDIR%\SYSTEM32\alg.exe
  • %WINDIR%\microsoft.net\framework\v2.0.50727\aspnet_state.exe
  • %WINDIR%\SYSTEM32\tlntsvr.exe
  • %WINDIR%\microsoft.net\framework\v2.0.50727\mscorsvw.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\OSE.EXE
  • %TEMP%\control.xml
  • %WINDIR%\SYSTEM32\scardsvr.exe
  • %WINDIR%\SYSTEM32\cisvc.exe
  • %WINDIR%\SYSTEM32\wbem\wmiapsrv.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\ngen_service.lock

The following files have been changed:

  • %WINDIR%\microsoft.net\framework\v2.0.50727\ngen_service.log

The following files were temporarily written to disk then later removed:

  • %WINDIR%\SYSTEM32\alg.vir
  • %WINDIR%\SYSTEM32\netdde.vir
  • %WINDIR%\SYSTEM32\scardsvr.vir
  • %WINDIR%\SYSTEM32\msiexec.vir
  • %WINDIR%\SYSTEM32\smlogsvc.vir
  • %WINDIR%\SYSTEM32\sessmgr.vir
  • %WINDIR%\SYSTEM32\imapi.vir
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\ose.vir
  • %WINDIR%\SYSTEM32\tlntsvr.vir
  • %WINDIR%\SYSTEM32\locator.vir
  • %WINDIR%\SYSTEM32\rsvp.vir
  • %WINDIR%\SYSTEM32\mnmsrvc.vir
  • %WINDIR%\SYSTEM32\dmadmin.vir
  • %WINDIR%\SYSTEM32\cisvc.vir
  • %WINDIR%\Microsoft.NET\framework\v2.0.50727\aspnet_state.vir
  • %WINDIR%\SYSTEM32\vssvc.vir
  • %WINDIR%\Microsoft.NET\framework\v2.0.50727\mscorsvw.vir
  • %WINDIR%\SYSTEM32\wbem\wmiapsrv.vir

The following registry elements have been created:

  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SECURITY CENTER\SVC\S-1-5-21-1482476501-[private subnet]522115-500\

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\SOUNDREC\WMPRIVTEST
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\.NETFRAMEWORK\V2.0.50727\NGENSERVICE\STATE\ACCUMULATEDWAITIDLETIME = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\MEDIAPLAYER\MP2.SAVEDIR = %PROGRAMFILES%\Windows Media Player
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SECURITY CENTER\SVC\S-1-5-21-1482476501-[private subnet]522115-500\ENABLENOTIFICATIONS = 0

The applications attempted the following network connection(s):

  • 65.55.13.***:80
  • hxxp://autoupdate.windowsmedia.com/update/*****

   

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

   

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