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Removing Trojan Horse


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#1 mainstretllc

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Posted 02 May 2009 - 10:27 AM

I am having trouble removing Trojan Horse backdoor generic.11.bcu. I receive an AVG threat warning every time I open either IE7 or Windows Explorer. I ran HijackThis and copied the log file into the Log Auto Analyzer on hjt.networktechs.com.

There is one entry the parser recommended removal of (C:\WINDOWS\system32\java.exe), but I can not locate it in the log file. I'm not sure if this is causing my problem, though.

Can anyone make a suggestion? Thanks.

Edit: Moved topic from XP to the more appropriate forum. ~ Animal

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#2 boopme

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Posted 02 May 2009 - 10:33 PM

Be very careful what you delete in an HJT log. if it's wrong ...no boot up is possible.
JAVA
Go into Control Panel>Add Remove Programs. Be sure the 'Show Updates' box is checked. Go down the list and tell me what Java applications are installed and their version. (Highlight the program to see this).

Next run MBAM:
Please download Malwarebytes Anti-Malware (v1.36) and save it to your desktop.
alternate download link 1
alternate download link 2
If you have a previous version of MBAM, remove it via Add/Remove Programs and download a fresh copy.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.
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#3 mainstretllc

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Posted 12 May 2009 - 08:28 AM

Thank you for responding to my post. I'm sorry I did not reply sooner. I neglected to add the 'Email Notification on Replies.'

Add/Remove Programs / Java Installations:
J2SE Runtime Environment 5.0 Update 7
Java ™ 6 Update 11
Java ™ 6 Update 3
Java ™ 6 Update 7
Java ™ SE Runtime Environment 6 Update 1

MBAM Log:
Malwarebytes' Anti-Malware 1.36
Database version: 2116
Windows 5.1.2600 Service Pack 3

5/12/2009 8:18:36 AM
mbam-log-2009-05-12 (08-18-36).txt

Scan type: Quick Scan
Objects scanned: 88129
Time elapsed: 9 minute(s), 12 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 4
Registry Values Infected: 4
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 5

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{29f3d419-4c0f-4bb3-81da-747d2dbd265a} (Trojan.BHO.H) -> Delete on reboot.
HKEY_CLASSES_ROOT\CLSID\{29f3d419-4c0f-4bb3-81da-747d2dbd265a} (Trojan.BHO.H) -> Delete on reboot.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{29f3d419-4c0f-4bb3-81da-747d2dbd265a} (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\seneka (Rootkit.Trace) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bf (Trojan.Agent) -> Delete on reboot.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bk (Trojan.Agent) -> Delete on reboot.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\iu (Trojan.Agent) -> Delete on reboot.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\mu (Trojan.Agent) -> Delete on reboot.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\system32\browse.dll (Trojan.BHO.H) -> Delete on reboot.
C:\WINDOWS\system32\drivers\egjypuly.sys (Rootkit.Agent) -> Delete on reboot.
C:\WINDOWS\system32\drivers\ynyojmqa.sys (Rootkit.Agent) -> Delete on reboot.
C:\RECYCLER\S-1-5-21-2000478354-854245398-839522115-1004\Dc330.exe (Adware.MyWeb) -> Quarantined and deleted successfully.
C:\Documents and Settings\Mike\Local Settings\Temp\ugrbuvwv.dat (Rootkit.Agent) -> Delete on reboot.

I am no longer receiving the AVG 'Threat Detected' warnings when opening IE7 or Explorer.

Thank you very much for your help.

#4 boopme

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Posted 13 May 2009 - 09:02 PM

Hello,no problem. I was very busy todayu myself. We have work to do. You have infections and rootkits to clean.
First fix the JAVA.
Your Java is out of date. Older versions have vulnerabilities that malicious sites can use to exploit and infect your system. Please follow these steps to remove older version Java components and update:
  • Download the latest version of Java Runtime Environment (JRE) Version 6 and save it to your desktop.
  • Look for "Java Runtime Environment (JRE)" JRE 6 Update 13.
  • Click the Download button to the right.
  • Select your Platform: "Windows".
  • Select your Language: "Multi-language".
  • Read the License Agreement, and then check the box that says: "Accept License Agreement".
  • Click Continue and the page will refresh.
  • Under Required Files, check the box for Windows Offline Installation, click the link below it and save the file to your desktop.
  • Close any programs you may have running - especially your web browser.
Go to Start > Settings > Control Panel, double-click on Add/Remove Programs and remove all older versions of Java.
  • Check (highlight) any item with Java Runtime Environment (JRE or J2SE) in the name.
  • Click the Remove or Change/Remove button and follow the onscreen instructions for the Java uninstaller.
  • Repeat as many times as necessary to remove each Java versions.
  • Reboot your computer once all Java components are removed.
  • Then from your desktop double-click on jre-6u13-windows-i586-p.exe to install the newest version.
-- If using Windows Vista and the installer refuses to launch due to insufficient user permissions, then Run As Administrator.
-- If you choose to update via the Java applet in Control Panel, uncheck the option to install the Toolbar unless you want it.
-- The uninstaller incorporated in this release removes previous Updates 10 and above, but does not remove older versions, so they still need to be removed manually.


Note: The Java Quick Starter (JQS.exe) adds a service to improve the initial startup time of Java applets and applications. To disable the JQS service if you don't want to use it, go to Start > Control Panel > Java > Advanced > Miscellaneous and uncheck the box for Java Quick Starter. Click Ok and reboot your computer.


Rerun MBAM like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan.
After scan click Remove Selected, Post new scan log and Reboot into normal mode.


Next Run ATF and SAS:
From your regular user account..
Download Attribune's ATF Cleaner and then SUPERAntiSpyware , Free Home Version. Save both to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining
.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.

Now reboot into Safe Mode: How to enter safe mode(XP)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode using the arrow keys.
Then press enter on your keyboard to boot into Safe Mode
.

Double-click ATF-Cleaner.exe to run the program.
Under Main "Select Files to Delete" choose: Select All.
Click the Empty Selected button.

If you use Firefox or Opera browser click that browser at the top and choose: Select All
Click the Empty Selected button.
If you would like to keep your saved passwords, please click No at the prompt.
Click Exit on the Main menu to close the program
.

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.


Please ask any needed questions,post 2 logs and Let us know how the PC is running now.
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#5 mainstretllc

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Posted 14 May 2009 - 08:00 PM

To boopme -

Thank you for taking the time to send the instructions. Here are copies of the two logs:

MBAM
Malwarebytes' Anti-Malware 1.36
Database version: 2132
Windows 5.1.2600 Service Pack 3

5/14/2009 5:13:27 PM
mbam-log-2009-05-14 (17-13-27).txt

Scan type: Quick Scan
Objects scanned: 95413
Time elapsed: 7 minute(s), 48 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)


SuperAntiSpyware
SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 05/14/2009 at 05:53 PM

Application Version : 4.26.1002

Core Rules Database Version : 3893
Trace Rules Database Version: 1841

Scan type : Complete Scan
Total Scan Time : 00:30:05

Memory items scanned : 212
Memory threats detected : 0
Registry items scanned : 6066
Registry threats detected : 4
File items scanned : 34798
File threats detected : 0

Adware.Zango Toolbar/Hb
HKCR\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}
HKCR\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\ProxyStubClsid
HKCR\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\ProxyStubClsid32
HKCR\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\TypeLib

The computer seems to be running well. I had a memory issue that was slowing it down a little, but someone else has helped we via of another post.

The logs (from what I can tell) seem to look OK. I'm not sure what the 'HCKR\Interface... is. Maybe those were the items cleared by SuperAntiSpyware?

Thank you.

#6 boopme

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Posted 14 May 2009 - 08:38 PM

this is very good and you are welcome.. I just want to run one more Rootkit check as they can return.

Next Please install RootRepeal

Go HERE, and download RootRepeal.zip to your Desktop.
Tutorial with images ,if needed >> L@@K.
Unzip that,(7-zip tool if needed) and then click RootRepeal.exe to open the scanner.
Next click on the Report tab, now click on Scan. A Window will open asking what to include in the scan. Check all of the below and then click OK.

Drivers
Files
Processes
SSDT
Stealth Objects
Hidden Services


Now you'll be asked which drive to scan. Check C: and click OK again and the scan will start. Please be patient as the scan runs. When the scan has finished, click on Save Report.
Name the log RootRepeal.txt and save it to your Documents folder (it should automatically save it there).
Please copy and paste that into your next reply.

Edited by boopme, 14 May 2009 - 08:39 PM.

How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#7 mainstretllc

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Posted 14 May 2009 - 09:32 PM

I ran the rootrepeal twice. As soon as I select 'What I want to include in the scan' and select 'Scan', the computer immediately reboots.

I'm not sure, but I must be missing something.

#8 boopme

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Posted 14 May 2009 - 09:41 PM

OK ,let's use GMER instead.
Please download GMER from one of the following locations and save it to your desktop:
  • Main Mirror
    This version will download a randomly named file (Recommended)
  • Zipped Mirror
    This version will download a zip file you will need to extract first. If you use this mirror, please extract the zip file to your desktop.
  • Disconnect from the Internet and close all running programs.
  • Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver.
  • Double-click on the randomly named GMER file (i.e. n7gmo46c.exe) and allow the gmer.sys driver to load if asked.
  • Note: If you downloaded the zipped version, extract the file to its own folder such as C:\gmer and then double-click on gmer.exe.

    Posted Image
  • GMER will open to the Rootkit/Malware tab and perform an automatic quick scan when first run. (do not use the computer while the scan is in progress)
  • If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO.
  • Now click the Scan button. If you see a rootkit warning window, click OK.
  • When the scan is finished, click the Save... button to save the scan results to your Desktop. Save the file as gmer.log.
  • Click the Copy button and paste the results into your next reply.
  • Exit GMER and re-enable all active protection when done.
-- If you encounter any problems, try running GMER in Safe Mode.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#9 mainstretllc

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Posted 15 May 2009 - 07:27 AM

Here are the results from the GER scan:

GMER 1.0.15.14972 - http://www.gmer.net
Rootkit scan 2009-05-15 06:58:15
Windows 5.1.2600 Service Pack 3


---- System - GMER 1.0.15 ----

SSDT \??\C:\Program Files\SUPERAntiSpyware\SASKUTIL.sys (SASKUTIL.SYS/SUPERAdBlocker.com and SUPERAntiSpyware.com) ZwTerminateProcess [0xB1FB9DF0]

---- User code sections - GMER 1.0.15 ----

.text C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe[3708] kernel32.dll!ExitProcess 7C81CB12 5 Bytes JMP 05052422 C:\Program Files\Google\Google Desktop Search\GoogleServices.DLL (Google Desktop/Google)
.text C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe[3708] USER32.dll!MessageBoxA 7E4507EA 5 Bytes JMP 050523CC C:\Program Files\Google\Google Desktop Search\GoogleServices.DLL (Google Desktop/Google)
.text C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe[3708] USER32.dll!MessageBoxW 7E466534 5 Bytes JMP 050523F7 C:\Program Files\Google\Google Desktop Search\GoogleServices.DLL (Google Desktop/Google)

---- Devices - GMER 1.0.15 ----

AttachedDevice \Driver\Tcpip \Device\Ip avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice \Driver\Tcpip \Device\Tcp avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice \Driver\Tcpip \Device\Udp avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice \Driver\Tcpip \Device\RawIp avgtdix.sys (AVG Network connection watcher/AVG Technologies CZ, s.r.o.)
AttachedDevice \FileSystem\Fastfat \Fat fltmgr.sys (Microsoft Filesystem Filter Manager/Microsoft Corporation)

Device \FileSystem\Cdfs \Cdfs DLAIFS_M.SYS (Drive Letter Access Component/Sonic Solutions)

---- Registry - GMER 1.0.15 ----

Reg HKLM\SOFTWARE\Classes\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\ProxyStubClsid@ {00020424-0000-0000-C000-000000000046}
Reg HKLM\SOFTWARE\Classes\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\ProxyStubClsid32@ {00020424-0000-0000-C000-000000000046}
Reg HKLM\SOFTWARE\Classes\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\TypeLib@ {5937CD7F-1C0B-41E1-9075-60EBDF3C7D34}
Reg HKLM\SOFTWARE\Classes\Interface\{85E06077-C824-43D0-A8DC-5EFB17BC348A}\TypeLib@Version 1.0

---- EOF - GMER 1.0.15 ----

Unfortunately, I will be away until Saturday night.

#10 boopme

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Posted 15 May 2009 - 01:58 PM

Ok, well it looks good. The HKCR = HKey_Classes_Root... It's a acronym that can contains many meanings. referencing a pathway.

Let me know Mon if there are still any issues
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#11 mainstretllc

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Posted 17 May 2009 - 11:28 AM

Things appear to be running well and the AVG warning when entering IE or Explorer has stopped.

I know I've said it before, but thanks again. It's nice when someone takes personal time to help others.

Gratefully,
Mike

#12 boopme

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Posted 17 May 2009 - 03:08 PM

Hi Mike, we appreciate being appreciated. It makes it worth while.

Now you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been backed up, renamed and saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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