Virus Profile: W32/Expiro.gen.n!CDA12409A6F4

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 3/26/2013
Date Added: 3/27/2013
Origin: Unknown
Length: 229376
Type: Virus
Subtype: Win32
DAT Required: 7025
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
Length229376 bytes
MD5cda12409a6f4f41c699b77f2d202e569
SHA170237f46f17b105cb106266b7c078891bbf97d6e


Other Common Detection Aliases

Company NamesDetection Names
AVG (GriSoft)Win32/Expiro
aviraTR/Crypt.XPACK.Gen
KasperskyVirus.Win32.Expiro.ao
BitDefenderWin32.Expiro.AV
clamavWIN.Virus.Expiro-6
Dr.WebWin32.Expiro.47
F-ProtW32/Expiro.AF
FortiNetW32/Krypt.BXA!tr
MicrosoftVirus:Win32/Expiro.BC
SymantecW32.Xpiro.D
EsetWin32/Expiro.NAN virus
normanw32/suspicious.c3!genr
pandaW32/Expiro.gen
risingWin32.Expiro.V
SophosW32/Expiro-H
Trend MicroPE_EXPIRO.ZZ
vba32Virus.Expiro.ao

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


ActivitiesRisk Levels
Attempts to write file to shared locations.Low
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:

70237F46F17B105CB[private subnet]891BBF97D6E

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\netdde.exe
  • %WINDIR%\SYSTEM32\magnify.exe
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\ngenrootstorelock.dat
  • %WINDIR%\SYSTEM32\wbem\wmiapsrv.exe
  • %WINDIR%\SYSTEM32\vssvc.exe
  • %WINDIR%\SYSTEM32\dmadmin.exe
  • %WINDIR%\SYSTEM32\smlogsvc.exe
  • %WINDIR%\SYSTEM32\locator.exe
  • %WINDIR%\SYSTEM32\sessmgr.exe
  • %WINDIR%\microsoft.net\framework\v2.0.50727\mscorsvw.exe
  • %WINDIR%\SYSTEM32\magnify.vir
  • %WINDIR%\SYSTEM32\alg.exe
  • %WINDIR%\microsoft.net\framework\v2.0.50727\aspnet_state.exe
  • %WINDIR%\SYSTEM32\tlntsvr.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\OSE.EXE
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\ngenservicelock.dat
  • %WINDIR%\SYSTEM32\mnmsrvc.exe
  • %WINDIR%\SYSTEM32\scardsvr.exe
  • %WINDIR%\SYSTEM32\cisvc.exe
  • %WINDIR%\SYSTEM32\imapi.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\scardsvr.vir
  • %WINDIR%\SYSTEM32\msiexec.vir
  • %WINDIR%\SYSTEM32\smlogsvc.vir
  • %WINDIR%\SYSTEM32\wbem\wmiapsrv.vir
  • %WINDIR%\Microsoft.NET\framework\v2.0.50727\mscorsvw.vir
  • %WINDIR%\SYSTEM32\imapi.vir
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\ose.vir
  • %WINDIR%\SYSTEM32\tlntsvr.vir
  • %WINDIR%\SYSTEM32\locator.vir
  • %WINDIR%\SYSTEM32\mnmsrvc.vir
  • %WINDIR%\SYSTEM32\netdde.vir
  • %WINDIR%\SYSTEM32\dmadmin.vir
  • %WINDIR%\SYSTEM32\cisvc.vir
  • %WINDIR%\Microsoft.NET\framework\v2.0.50727\aspnet_state.vir
  • %WINDIR%\SYSTEM32\vssvc.vir
  • %WINDIR%\SYSTEM32\sessmgr.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\MICROSOFT\.NETFRAMEWORK\V2.0.50727\NGENSERVICE\STATE\ACCUMULATEDWAITIDLETIME = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SECURITY CENTER\SVC\S-1-5-21-1482476501-[private subnet]522115-500\ENABLENOTIFICATIONS = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\TRACING\MICROSOFT\IMAPI\ACTIVE = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\TRACING\MICROSOFT\IMAPI\CONTROLFLAGS = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\TRACING\MICROSOFT\IMAPI\LOGSESSIONNAME = stdout
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\TRACING\MICROSOFT\IMAPI\IMAPISVC\BITNAMES = ImapiDebugError ImapiDebugWarning ImapiDebugTrace ImapiDebugInfo ImapiDebugX ImapiDebugSort
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\TRACING\MICROSOFT\IMAPI\IMAPISVC\GUID = 8107d8e9-e323-49f5-bba2-abc35c243dca

   

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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