Virus Profile: W32/YahLover.worm.zz!AF6CF361C024

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 12/4/2012
Date Added: 12/4/2012
Origin: Unknown
Length: 1115136
Type: Virus
Subtype: Win32
DAT Required: 6915
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/YahLover.worm.zz
Length1115136 bytes
MD5af6cf361c024c529e312670c10077c69
SHA1b9cd38eb09a04b85cf0424a1a22e6a6ef6e2159d


Other Common Detection Aliases

Company NamesDetection Names
ahnlabWin32/Yahlover.worm.808448
AVG (GriSoft)Downloader.Agent2.WQU
aviraTR/Crypt.XPACK.Gen
KasperskyWorm.Win32.AutoIt.sp
BitDefenderTrojan.Downloader.JMGF
clamavPUA.Win32.Packer.PrivateExeProte-15
Dr.WebTrojan.DownLoad.5589
F-ProtW32/Downldr2.GAMK
FortiNetW32/AutoIt.A!worm
MicrosoftWorm:Win32/YahLover.C
SymantecW32.Imaut
EsetWin32/AutoRun.Autoit.P worm
normanSuspicious.A
pandaW32/Sohanat.DD.worm
risingWorm.Win32.Agent.wx
SophosMal/Sohana-A
Trend MicroWORM_YAHLOVER.AE
vba32Trojan.Win32.Scar.auuz
V-BusterWorm.Autoit.AAN (trojan)
Vet (Computer Associates)Win32/YahLover.IJ

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


ActivitiesRisk Levels
Attempts to create Autorun.inf configuration files on accessible drives that instructs Windows operating systems to run a file when the disk is connected.High
Modifies winlogon configuration settings in registryMedium
Adds or modifies winlogon shell registry value. Could be used to launch a program on startup.Medium
Enumerates many system files and directories.Low
Enumerates process listLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaW32/YahLover.worm.zz
McAfee SupportedW32/YahLover.worm.zz



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:

New_Folder.exe

The following files have been added to the system:

  • %WINDIR%\scvhost.exe
  • %WINDIR%\SYSTEM32\scvhost.exe
  • %WINDIR%\SYSTEM32\autorun.ini
  • %WINDIR%\SYSTEM32\setting.ini

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\WORKGROUPCRAWLER\SHARES\SHARED = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\YAHOO MESSENGGER = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\WINLOGON\SHELL = Explorer.exe scvhost.exe
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SCHEDULE\ATTASKMAXHOURS = 0

The applications attempted the following network connection(s):

  • 204.13.161.***:80
  • 69.27.174.**:80

   

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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