AdClicker-BA!D106701E

Overview

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Minimum DAT

5327 (2008-06-27)

Updated DAT

5327 (2008-06-27)

Minimum Engine

5.2.00

File Length

150016

Description Added

2008-06-30

Description Modified

2008-06-30

Malware Proliferation

Characteristics

File Property	Property Value
File Name	malign~1.exe
McAfee Detection	AdClicker-BA
Length	150,016 bytes
CRC32	D106701E
MD5	84c51570890b5a1c2c0a55ccf1b87324
SHA1	D7E845054282FD3142DFECD9BFA642686E7CE5CD

Other Common Detection Aliases

Company Name	Detection Name
AVG (GriSoft)	dropper.agent.5.ba
Microsoft	trojandropper:win32/agent.hz
Norman	w32/agent.hld
Panda	Trj/Downloader.MDW
Symantec	Trojan.Elitebar
Trend Micro	TROJ_STARTPAG.OV

Avert® Labs has observed the following system activities:

Activity	Risk Level
Modifies Memory of Other Processes	High
Enumerates running Processes	Medium
Attempts to Alter a Browsers User Agent	Low
Creates an Internet Explorer Tool Bar	Low
Creates Registry Keys and Data values persistent on OS Reboot	Low
Enumerates open windows	Low
Writes Executable in the Windows Folder	Low
Program often suspends itself	Informational
Registers DLLs	Informational

System Changes

These are general defaults for typical path variables. (Although they may differ, these examples are common.):
%WinDir% = \WINDOWS (Windows 9x/ME/XP/Vista), \WINNT (Windows NT/2000)
%SystemDir% = \WINDOWS\SYSTEM (Windows 98/ME), \WINDOWS\SYSTEM32 (Windows XP/Vista), \WINNT\SYSTEM32 (Windows NT/2000)
%ProgramFiles% = \Program Files

The following files have been added to the system:

%WINDIR%\elitetoolbar\

%WINDIR%\elitetoolbar\xml

%WINDIR%\elitetoolbar\xml\categories

%WINDIR%\elitetoolbar\xml\images

%WINDIR%\system32\elitexdk32.exe

The following registry elements have been created:

HKEY_CURRENT_USER\software\lq\

ac = 48
ad = 48
at = 3158067
i = {e74fcdec-85d6-4661-9a11-97b8cfed26c0}
tm = 10
tr = 1200
u = 48

HKEY_LOCAL_MACHINE\software\classes\clsid\{28caeff3-0f18-4036-b504-51d73bd81abc}\

(default) = &elitebar

HKEY_LOCAL_MACHINE\software\classes\clsid\{28caeff3-0f18-4036-b504-51d73bd81abc}\inprocserver32\

(default) = c:\windows\elitetoolbar\elitetoolbar version 60.dll
threadingmodel = apartment

HKEY_LOCAL_MACHINE\software\classes\clsid\{825cf5bd-8862-4430-b771-0c15c5ca8def}\

(default) = &elitebar

HKEY_LOCAL_MACHINE\software\classes\clsid\{825cf5bd-8862-4430-b771-0c15c5ca8def}\inprocserver32\

(default) = c:\windows\elitetoolbar\elitetoolbar version 60.dll
threadingmodel = apartment

HKEY_LOCAL_MACHINE\software\elitum\elitetoolbar\

_show = 1
ac1 = adult
accountnumber = malign~1
adult.tbr = 48
autocomplete = 1
axparam = &cc=1
default.tbr = 48
firsttimestarted = 1
guid = b5174e34-1b91-4695-a143-27e4941c1e36
path = c:\windows\elitetoolbar\
popupblocker = 26223
popupblocker = no
popups = 7562617
pthreshold = 53
search.mnu = 48
searchindex = 0
uninstalled = no
updateattempt = 06080714
updatedate = 010101
version = 60

HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\elitebar internet explorer toolbar\

displayicon = "c:\windows\elitetoolbar\elitetoolbar version 60.dll", 1
displayname = elitebar internet explorer toolbar
uninstallstring = regsvr32 /s /u "c:\windows\elitetoolbar\elitetoolbar
version 60.dll"

The following registry elements have been changed:

HKEY_CURRENT_USER\sessioninformation\

programcount = 1
programcount = 2

HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser\

{01e04581-4eee-11d0-bfe9-00aa005b4383} = [binary data]
{0e5cbf21-d15f-11d0-8301-00aa005b4383} = [binary data]
itbarlayout = [binary data]

HKEY_CURRENT_USER\software\microsoft\windows\currentversion\explorer\menuorder\favorites\links\

order = [binary data]

HKEY_LOCAL_MACHINE\software\classes\typelib\{1ea4dbf0-3c3b-11cf-810c-00aa00389b71}\1.1\0\win32\

(default) = c:\windows\system32\oleacc.dll
(default) = oleacc.dll

HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\main\

enable browser extensions = 7562617

HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar\

{825cf5bd-8862-4430-b771-0c15c5ca8def} = elitetoolbar

HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run\

etbrun = c:\windows\system32\elitexdk32.exe

HKEY_LOCAL_MACHINE\system\currentcontrolset\control\session manager\

pendingfilerenameoperations = \??\c:\temp.exe

The applications created the following network connection(s):

172.16.199.200 port (80) Protocol (http)

hxxp://[Domain Removed]/control.php?q
=96C7A8CAD796D8CA6E6A589BAD9D999E6A6E9896686A659A9F6D579DADCA9D96A2D398
C6CD72D2D4A598A7A79D985BC59E9BC4D99EAA8FDAC8AA6E665ECCB0AD9AD671918796C
8DA9DAD91A89AA672915FA8C8C5A49998C5D3A6A6736887ACA099C996C2D372D2D457A9
A1A4ADA472DA9EA889DA97A8A3CFD5A66E6C6887A8AA72BB9DCFB98589976189A4A39E9
9A8D4A2A4D1C59E5B62968B6A615C99C49C7482A580AAA883E296579C957165655BD6A7
9ED1D7A6979CD2CB9C6EA4A7879C9A7295&unique_user=b5174e34-1b91-4695-a143
-27e4941c1e36

sa.windows.com port (80) Protocol (http)

hxxp://sa.windows.com /sasearch/************
hxxp://sa.windows.com /sasearch/*************

update.msupdater.com port (80) Protocol (http)

hxxp://update.msupdater.com /***************************************
hxxp://update.msupdater.com
/**********************************************************************
******************************

Symptoms

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

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

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.

Threat Detail