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Adware.AlexaBar.b Analysis Report
Threat Submitted On: 5/10/2007 3:59:19 PM
Threat Analysed On: 5/10/2007 8:59:19 PM
Threat Updated On: 11/8/2009 1:32:34 AM
Type : Adware
Symptoms of AlexaBar.b
  • Displays porn/abusive content or intrusive third-party advertisements.
  • Shows deceptive or false warning.
  • Generates advertisement even when the program is not running
  • Synchronously installs other bundled program.
  • The program can places unwanted adverts on computer screen.
Information
Alias : AdWare.Win32.AlexaBar.b
Md5 Hash : [d3dca59ad36653c774e639f6c48b5ba4]
File Size : (520281 bytes)

Here are the Technical findings of our analysis team after analyzing this malware in detail :-

Creates the following infected Files on user's System
Note:
Delete the following Files to remove Infection
File: uninstall.exe
Path : %programfiles%\alexa toolbar

Md5Hash :c70a0bffa34e9775d36577a1e02527f6 ( 63712 bytes)
File: [RandomName].dll
Path : %workingdir%

Md5Hash :5434903cbf712973f82963537ddf8973 ( 520281 bytes)
File: alxres.dll
Path : %windir%\system32

Md5Hash :3924e6448f74db244e1b72e2bd511e68 ( 344064 bytes)
File: alxtb1.dll
Path : %windir%\system32

Md5Hash :5434903cbf712973f82963537ddf8973 ( 520281 bytes)
File: [randomname].exe
Path : %workingdir%

Skip Navigation Links.
Collapse Md5Hash :Md5Hash :
0cccab242df506a65222dd0571900003 ( 520304 bytes)
3b0c1a7fa6d79979ecc5891f968ea07f ( 520298 bytes)
44a3ee6480297c49fe31a1e00ab686e9 ( 520299 bytes)
787707c882b7e117b26925b7771b2cd4 ( 410096 bytes)
ab385b1da34cd58de4c6a5f829efde86 ( 520297 bytes)
d3dca59ad36653c774e639f6c48b5ba4 ( 520281 bytes)
ff90253cfca0e376b221e7803a28ac62 ( 520303 bytes)
Also creates the following files on user's System which are also created by Genuine Software :-
Note:
These file(s) can be kept as they are also created by genuine Software.
File : installoptions.dll
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :4c7d97d0786ff08b20d0e8315b5fc3cb ( bytes)
File : iospecial.ini
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :745b9af17b362e25639cbb0834be8051 ( bytes)
File : modern-header.bmp
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :1968e8c79a77f53f065ea299cbfabe29 ( bytes)
File : modern-wizard.bmp
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :cbe40fd2b1ec96daedc65da172d90022 ( bytes)
File : notify.ini
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :591d6b0925927fa07ed4d58d8d732632 ( bytes)
File : system.dll
Path : %systemdrive%\temp\nsd5.tmp

Md5Hash :e085476805e8f5ef1c7ed635c5309017 ( bytes)
File : nsy3.tmp
Path : %systemdrive%\temp

Md5Hash :69264a0c1b1007f09ff79e3b3704e1d2 ( bytes)
File : msimgsiz.dat
Path : %userprofile%\local settings\application data\microsoft\internet explorer

Md5Hash :8489571f883d5ee11b8aed2565dd69e8 ( 16384 bytes)
File : desktop.ini
Path : %userprofile%\local settings\history

Md5Hash :d332ce83b166d5c244d22587ad75aac4 ( 113 bytes)
File : desktop.ini
Path : %userprofile%\local settings\temporary internet files

Md5Hash :4a3deb274bb5f0212c2419d3d8d08612 ( 67 bytes)
Creates the following infected Registry Keys on user's System
Note:
Delete these Registries to remove Infection
The following Registry Values are added to the provided Registry Keys :-
Note:
Delete the added Values from the Key to remove Infection
|__ Value Added :
threadingmodel = "apartment"
|__ Value Added :
clsid = "{4d5c8c2a-d075-11d0-b416-00c04fb90376}"
|__ Value Added :
url = "res://alxtb1.dll/chtml/bootstrap.html"
|__ Value Added :
threadingmodel = "apartment"
|__ Value Added :
ThreadingModel = "apartment"
|__ Value Added :
threadingmodel = "apartment"
|__ Value Added :
ThreadingModel = "apartment"
|__ Value Added :
contexts = "[reg_dword, value: 00000010]"
|__ Value Added :
contexts = "[reg_dword, value: 00000021]"
|__ Value Added :
contexts = "[reg_dword, value: 00000001]"
|__ Value Added :
contexts = "[reg_dword, value: 00000021]"
|__ Value Added :
contexts = "[reg_dword, value: 00000001]"
|__ Value Added :
querypath = "http://soap.alexa.com/office/alexa-pane"
|__ Value Added :
registrationpath = "http://soap.alexa.com/office/alexa-pane"
|__ Value Added :
description = "provides information about websites, including traffic information and related links, as well as an internet search."
|__ Value Added :
aid = "y0zl61xylfb3lu"
|__ Value Added :
alexaversion = "7.0"
|__ Value Added :
enablepopup = "true"
|__ Value Added :
enablepopupbutton = "true"
|__ Value Added :
expvis = "[reg_dword, value: 00000000]"
|__ Value Added :
fillsearch = "true"
|__ Value Added :
hints = "234"
|__ Value Added :
ievis = "true"
|__ Value Added :
installcomplete = "true"
|__ Value Added :
lastcheck = "1117088027"
|__ Value Added :
lasthint = "0"
|__ Value Added :
lasthint = "1117088031203"
|__ Value Added :
lastupdate = "1117088029609"
|__ Value Added :
shownames = "icons_stext"
|__ Value Added :
useanswerasdefault = "1"
|__ Value Added :
widesearch65 = "normal"
|__ Value Added :
alexa.com = "[reg_dword, value: 00000000]"
|__ Value Added :
{3ceff6cd-6f08-4e4d-bccd-ff7415288c3b} = "[reg_binary, size: 1 bytes]"
|__ Value Added :
uninstallstring = "%programfiles%\alexa toolbar\uninstall.exe"
Also creates the following legitmate Registries on user's Systems which are also created by Genuine Software :-
Note:
These Keys can be kept as they are also created by genuine Software
The following Registry Values are added to the provided Registry Keys which are also created by Genuine Software :-
Note:
These Values can be left as they are also created by legitimate Software :-

NOTE:

1. %programfiles% Refers to the program files folder. By default it is 'C:\Program Files'
3. %workingdir% Refers to the current directory in which user is working.
4. %windir% Refers to the windows root folder. By default it is 'C:\Windows'
5. %systemdrive% Refers to the windows System drive folder. By default it is 'C:\'
6. %userprofile% Refers to the windows current user's profile folder. By default it is 'C:\Documents and Settings\[user]'

Important: We strongly recommend that you backup the Registry before making any changes to it. Incorrect changes to the Registry can result in permanent data loss or corrupted Files. Modify the malicious\suspicious Subkeys only.

Click Here for more spywarelib.com recommended PC Security and Optimization Tools

To modify registry entries in Windows Operating System:
Follow Steps:
1. Click Start > Run
2. Type “regedit” : to open registry editor
3. Navigate to required registry Key from the Left Tree control and modify accordingly.


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