Hello,
I am helping my brother in law get rid of his malware. I have downloaded malwarebytes and gotten rid of lots of stuff, but I cannot delete 4 trojan agents (neither on reboot with malwarebytes nor manually via regedit).
The keys follow:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bf
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\bk
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\iu
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Settings\mu


Any help would be appreciated. HijackThis! log is attached.

Please do not attach files unless requested.



STEP 01

Please visit this webpage for instructions for downloading ComboFix to your DESKTOP : how-to-use-combofix
Please ensure you read this guide carefully and install the Recovery Console first.
NOTE!!: You must save and run ComboFix.exe on your DESKTOP and not from any other folder.
Also, DO NOT click the mouse or launch any other applications while this is running or it may stall the program

Additional links to download the tool:
ComboFix.exe
ComboFix.exe
ComboFix.exe


Note: The Windows Recovery Console will allow you to boot up into a special recovery (repair) mode. This allows us to more easily help you should your computer have a problem after an attempted removal of malware. It is a simple procedure that will only take a few moments of your time.

Once installed, you should see a blue screen prompt that says:

The Recovery Console was successfully installed.

Please continue as follows:

• Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
• Click Yes to allow ComboFix to continue scanning for malware.
• When the tool is finished, it will produce a report for you.
• Please post the C:\ComboFix.txt along with a new HijackThis log so we may continue cleaning the system.

STEP 02

Please create a BOOTLOG
• Restart the computer and press F8 when Windows start booting. This will bring up the startup options.
• Select "Enable Boot Logging" option and press enter.
• Windows prompts you to select a Windows Installation (even if there is only one windows installation)
• This boots windows normally and creates a boot log named ntbtlog.txt and saves it to C:\Windows
  
  If you're already running inside Windows you can enable it the following way.
  
• Click on START - RUN and type in MSCONFIG go to the BOOT.INI tab and place a check mark by /BOOTLOG
• Click on OK and you will be prompted to RESTART Windows. Please do restart now.
• After Windows restarts open the file C:\Windows\ntbtlog.txt with Notepad
• From the Edit menu choose Select All then Edit, COPY and post that back on your next reply.
• Note: Vista users can type in the Search and it will show on the menu, then Right click and choose Run as Adminsitrator
• The tab is called BOOT on Vista. Then choose Boot log

STEP 03

Download DDS and save it to your desktop
http://download.bleepingcomputer.com/sUBs/dds.scr

Disable any script blocker if your Anti-Virus/Anti-Malware has it.
Once downloaded you can disconnect from the Internet and disable your Ant-Virus temporarily if needed.
Then double click dds.scr to run the tool.
When done, the DDS.txt will open.
Click Yes at the next prompt for Optional Scan.

When done, DDS will open two (2) logs:

1. DDS.txt
2. Attach.txt

• Save both reports to your desktop
• Please include the following logs in your next reply: DDS.txt and Attach.txt

STEP 04
RootRepeal - Rootkit Detector

• Please download the following tool: RootRepeal - Rootkit Detector
• Direct download link is here: RootRepeal.rar
• If you don't already have a program to open a .RAR compressed file you can download a trial version from here: WinRAR
• Extract the program file to a new folder such as C:\RootRepeal
• Run the program RootRepeal.exe and go to the REPORT tab and click on the Scan button
• Select ALL of the checkboxes and then click OK and it will start scanning your system.
• If you have multiple drives you only need to check the C: drive or the one Windows is installed on.
• When done, click on Save Report
• Save it to the same location where you ran it from, such as C:\RootRepeal
• Save it as your_name_rootrepeal.txt - where your_name is your forum name
• This makes it more easy to track who the log belongs to.
• Then open that log and select all and copy/paste it back on your next reply please.
• Quit the RootRepeal program.

Please post a status update on this

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The fixes and advice in this thread are for this machine only. Do not apply the instructions from this thread to your own machine. Please start a new thread describing your issue and someone will be along to assist you.