W32/YahLover.worm!2AC​1BC815D71

This page shows details and results of our analysis on the malware W32/YahLover.worm!2AC1BC815D71

Overview

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.


Minimum DAT

7103 (2013-06-11)

Updated DAT

7103 (2013-06-11)

Minimum Engine

5400.1158

File Length

1918464

Description Added

2013-06-12

Description Modified

2013-06-12

Malware Proliferation

Characteristics

This is a Virus

File PropertiesProperty Values
McAfee DetectionW32/YahLover.worm
Length1918464 bytes
MD52ac1bc815d71cd4084cddde94a7cf61a
SHA199d74aa41aa663ee7a111afa0942a46d2ce77254


Other Common Detection Aliases

Company NamesDetection Names
ahnlabWorm/Win32.Sohaned
avastAutoIt:Lisisor-A
aviraTR/Dropper.Gen
KasperskyWorm.Win32.AutoIt.dn
Dr.WebTrojan.StartPage.38343
FortiNetW32/AutoIt.AOA!worm
MicrosoftWorm:Win32/Nuqel.AR
SymantecW32.Imaut
EsetWin32/AutoRun.Autoit.EK
normanautoit:legacyascii/Suspicious.A
pandaW32/Sohanat.HL.worm
SophosW32/AutoRun-AOA
Trend MicroWORM_SOHANAD.HJ

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


ActivitiesRisk Levels
Prevents the use of the default Windows Registry Editor.High
Disables the Windows Task Manager.High
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
Adds or modifies system policies. Could be used to prevent the or detour the use of common system tools.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
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


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



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:

99D74AA41AA663EE7A111AFA0942A46D2CE77254

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\chrome.exe
  • %WINDIR%\SYSTEM32\autorun.ini
  • %WINDIR%\chrome.exe

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

  • %WINDIR%\SYSTEM32\setting.ini
  • %WINDIR%\SYSTEM32\setting.ini.old

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\SYSTEM\
  • HKEY_CURRENT_USER\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\
  • HKEY_CURRENT_USER\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\CONTROL PANEL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\
  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\INTERNET EXPLORER\CONTROL PANEL\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://h1.ripway.com/poojasharma/index.html
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\EXPLORER\NOFOLDEROPTIONS = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\SYSTEM\DISABLEREGISTRYTOOLS = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\SYSTEM\DISABLETASKMGR = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\YAHOO MESSENGGER = %WINDIR%\SYSTEM32\chrome.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\DEFAULT_PAGE_URL = http://h1.ripway.com/poojasharma/index.html
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\DEFAULT_SEARCH_URL = http://h1.ripway.com/poojasharma/index.html
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\SEARCH PAGE = http://h1.ripway.com/poojasharma/index.html
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://h1.ripway.com/poojasharma/index.html
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\WINLOGON\SHELL = Explorer.exe chrome.exe
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SCHEDULE\ATTASKMAXHOURS = 0

The applications attempted the following network connection(s):

  • 199.59.243.***:80
  • hxxp://h1.ripway.com/poojasharma1/*****

Symptoms

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

Method 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.

Removal

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.

Variants