Trojan.Dropper.Bcminer infection

[markcable]

Hi, just got these alerts today, could anyone help please?

best regards, Mark

 

[Jack]

Hi and welcome to the malwaretips.com forums!

I'm Jack and I am going to try to assist you with your problem. Please take note of the below:

• I will start working on your malware issues, this may or may not, solve other issues you have with your machine.
• The fixes are specific to your problem and should only be used for this issue on this machine!
• The process is not instant. Please continue to review my answers until I tell you your machine is clear. Absence of symptoms does not mean that everything is clear.
• If you don't know, stop and ask! Don't keep going on.
• Please reply to this thread. Do not start a new topic.
• Refrain from running self fixes as this will hinder the malware removal process.
• It may prove beneficial if you print of the following instructions or save them to notepad as I post them.

Your security programs may give warnings for some of the tools I will ask you to use. Be assured, any links I give are safe.


Before we start:
Please be aware that removing malware is a potentially hazardous undertaking. I will take care not to knowingly suggest courses of action that might damage your computer. However it is impossible for me to foresee all interactions that may happen between the software on your computer and those we'll use to clear you of infection, and I cannot guarantee the safety of your system. It is possible that we might encounter situations where the only recourse is to re-format and re-install your operating system, or to necessitate you taking your computer to a repair shop.

Because of this, I advise you to backup any personal files and folders before you start.
<hr />
Well, I can confirm that you have an infection.Lets run a Combofix scan:

STEP 1 : Run a scan with Combofix

Please read and follow very carefully the below instructions​

 
Download ComboFix from one of the following locations: 

COMBOFIX DOWNLOAD LINK #1 (This link will automatically download Combofix on your computer)
COMBOFIX DOWNLOAD LINK #2  (This link will automatically download Combofix on your computer)
 
VERY IMPORTANT !!! Save ComboFix.exe to your Desktop  
 
<ul>
<li>Close any open browsers.</li>
<li>Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
-----------------------------------------------------------
<ul>
<li><>Very Important!</> Temporarily <>disable</> your <>anti-virus</>, <>script blocking</> and any <>anti-malware</> real-time protection <em><>before</></em>performing a scan. They can interfere with ComboFix or remove some of its embedded files which may cause <em>"unpredictable results"</em>.</li>
<li><em>Click on <a title="External link" href="http://www.bleepingcomputer.com/forums/topic114351.html" rel="nofollow external"><>this link</></a> to see a list of programs that should be disabled. The list is not all inclusive. If yours is not listed and you don't know how to disable it, please ask.</em>
-----------------------------------------------------------</li>
</ul>
<ul>
<li>Close any open browsers.</li>
<li><>WARNING: Combofix will disconnect your machine from the Internet as soon as it starts</></li>
<li>Please do not attempt to re-connect your machine back to the Internet until Combofix has completely finished.</li>
<li>If there is no internet connection after running Combofix, then restart your computer to restore back your connection.</li>
</ul>
-----------------------------------------------------------</li></ul>
How to run the Combofix scan :

1. Double click on ComboFix.exe & follow the prompts.
2. Accept the disclaimer and allow to update if it asks
   
3. When finished, it shall produce a log for you. 
   [*]Please include the C:\ComboFix.txt in your next reply.

Notes:
<ol><li> Do not mouse-click Combofix's window while it is running. That may cause it to stall.</li>
<li> Do not "re-run" Combofix. If you have a problem, reply back for further instructions.</li>
<li>  If after the reboot you get errors about programms being marked for deletion then reboot, that will cure it.</li></ol>



<hr />
What's next?

Please post in your next reply:
1.Combofix log
2.Let me know if you had any problems with the above instructions and also <>let me know how things are running now!</>

 

[markcable]

Hi Jack,

Thanks for your quick reply and help, which has seemed to have sorted out my problems, I have just ran Malwarebytes and it did'nt find anything nasty, so it is all looking good. Attached is the combofix log you requested.

Once again, Many thanks, Mark

 

[Jack]

Well,the good news is that Combofix got this infection... Now,I'll need you to run this scans:

STEP 1: Run a HitmanPro scan
<ol>
<li><>Download the latest official version of HitmanPro</>.
<a href="http://www.surfright.nl/en/hitmanpro/" rel="nofollow" target="_blank"> <>HITMANPRO DOWNLOAD LINK</></a> <em>(This link will open a download page in a new window from where you can download HitmanPro)</em></li>
<li>Start HitmanPro  by <>double clicking on the previously downloaded file.</> and then following the prompts.
>>> IF you are experiencing problems while trying to start HitmanPro, you can use the Force Breach mode.To start HitmanPro in Force Breach mode, hold down the left CTRL-key when you start HitmanPro and all non-essential processes are terminated, including the malware process. (How to start HitmanPro in Force Breach mode – Video)
<img src="http://malwaretips.com/images/removalguide/hpro4.png" alt="[Image: hitmanproscan4.png]" border="0" /></li>
<li>Once the scan is complete, a screen displaying all the malicious files that the program found will be shown as seen in the image below.After reviewing each malicious object click <>Next</> .
<img src="http://malwaretips.com/blogs/wp-content/uploads/2012/02/rsz_hpro5.png" alt="[Image: hitmanproscan5.png]" border="0" /></li>
<li>Click <>Activate free license</> to start the free 30 days trial and remove the malicious files.
<img src="http://malwaretips.com/images/removalguide/hpro6.png" alt="[Image: hitmanproscan6.png]" border="0" /></li>
<li>HitmanPro will now start removing the infected objects, and in some instances, may suggest a reboot in order to completely remove the malware from your system. In this scenario, always confirm the reboot action to be on the safe side.
</ol>
Add to your next reply, any log that HitmanPro might generate.
<hr />
STEP 2: Run a scan with ESET Online Scanner.

<ol>
<li>Download ESET Online Scanner utility.
<><a title="External link" href="http://download.eset.com/special/eos/esetsmartinstaller_enu.exe" rel="nofollow">ESET ONLINE SCANNER DOWNLOAD LINK</a></> <em>(This link will automatically download ESET Online Scanner on your computer.)</em></li>
<li>Double click on the Eset installer program (esetsmartinstaller_enu.exe).</li>
<li>Check <>Yes, I accept the Terms of Use</></li>
<li>Click the <>Start</> button.</li>
<li>Check <>Scan archives</></li>
<li>Push the <>Start</> button.</li>
<li>ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.</li>
<li>When the scan completes, push <>List of found threats</></li>
<li>Push <>Export to Text file </> and save the file to your desktop using a unique name, such as <>ESET Scan</>. Include the contents of this report in your next reply.Note - when ESET doesn't find any threats, no report will be created.</li>
<li>Push the <>back</> button.</li>
<li>Push <>Finish</></li>
</ol>
<hr />
STEP 3: Run Windows Repair All in One

<ol><li>Download the Windows Repair All in One utility from the below link.
<a title="External link" href="http://www.tweaking.com/content/page/windows_repair_all_in_one.html" rel="nofollow"><>WINDOWS REPAIR ALL IN ONE DOWNLOAD LINK</></a>  <em>(This link will open a download page in a new window from where you can download Windows Repair All in One Portable version)</em></li>
<li>Double-click <>tweaking.com_windows_repair_aio.zip</> and extract the <>Tweaking.com - Windows Repair</> folder to your desktop.</li>
<li>Now open this folder and double-click <>Repair_Windows.exe</>.</li>
<li>Click the <>Start Repairs</> tab on the far right.</li>
<li>Click the <>Start</> button (bottom right)
Note: When asked if you would like to create a restore point. It is recommended just in-case something does not go as planned.</li>
<li>Click <>Unselect All</></li>
<li>Put a checkmark in the following items:
<ul>
<li>Repair Hosts File</li>
<li>Remove Temp Files</li>
<li>Remove Policies Set By Infections</li>
</ul>
Note: Leave everything else unchecked</li>
<li>Put a checkmark in <>Restart System When Finished</></li>
<li>Now click the <>Start</> button (bottom right)</li>
</ol>
<hr />
STEP 4: Run a scan with OTL by OldTimer
<ol><li>You can download the OTL utility from the below link :
<><a title="External link" href="http://oldtimer.geekstogo.com/OTL.exe" rel="nofollow external">OTL DOWNLOAD LINK</a> <em>(This link will automatically download OTL on your computer)</em></></li>
<li>Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.
<img src="http://malwaretips.com/blogs/wp-content/uploads/2012/07/OTL-logo.png" alt="" title="OTL-logo" width="106" height="118" class="alignnone size-full wp-image-3946" /></li>
<li>When the window appears, <>underneath Output</> at the top change it to <>Minimal Output</>.</li>
<li>Check the boxes beside <>LOP Check</> and <>Purity Check</>.</li>
<li>Under the Custom Scan box paste this in:
<code>%SYSTEMDRIVE%\*.exe
%ALLUSERSPROFILE%\Application Data\*.exe
%APPDATA%\*.
msconfig
/md5start
atapi.sys
explorer.exe
winlogon.exe
Userinit.exe
svchost.exe
services.exe
csrss.exe
PrintIsolationHost.exe
consrv.dll
/md5stop
%systemroot%\*. /mp /s
hklm\software\clients\startmenuinternet|command /rs
hklm\software\clients\startmenuinternet|command /64 /rs
%systemroot%\system32\*.dll /lockedfiles
%systemroot%\Tasks\*.job /lockedfiles
%systemroot%\system32\drivers\*.sys /lockedfiles
CREATERESTOREPOINT</code></li>
<li>Click the<> Run Scan</> button.
<img src="http://malwaretips.com/blogs/wp-content/uploads/2012/07/otl-custom.png" alt="" title="OTL with Custom scans" width="658" height="584" class="alignnone size-full wp-image-3945" /></li>
<li>When the scan completes, it will open a <>OTL.Txt</>. This will be saved in the same location as OTL.
<>Please post this log in your next reply.</>.</li></ol>
<em>Note: If OTL.exe will not run, it may be blocked by malware. Try these alternate versions: <a title="External link" href="http://www.itxassociates.com/OT-Tools/OTL.scr" rel="nofollow external">OTL.scr</a>, or <a title="External link" href="http://oldtimer.geekstogo.com/OTL.com" rel="nofollow external">OTL.com</a>.</em>
<hr />

What's next?

Attach the following logs to your post (You can find here details on how to use the Attachment System):
1.HitmanPro log
2.ESET log
3.OTL logs
4.Let me know if you had any problems with the above instructions and also let me know how things are running now!

 

[markcable]

Hi Jack,

here are the logs you wanted, everything seems to be fine, malwarebytes says that there are no new infections, Hitman did report combofix as a trojan and also two files flt1chk.dll and flt3chk.dll as trojans but I know for certainthat they are false positives.

Thanks once again for your speedy help.

Regards, Mark

 

[Jack]

Unless you are having other problems, it is time to do the final steps.

<>Remove ComboFix</>
<ol>
<li>Hold down the <>Windows key</> + <>R</> on your keyboard. This will display the Run dialogue box</li>
<li>In the Run box, type in <>ComboFix /Uninstall</> <em>(Notice the space between the "x" and "/")</em> then click <>OK</> <a href="http://malwaretips.com/blogs/wp-content/uploads/2012/07/combofix-uninstall.png"><img class="alignnone size-full wp-image-4129" title="Uninstall Combofix" src="http://malwaretips.com/blogs/wp-content/uploads/2012/07/combofix-uninstall.png" alt="Combofix uninstall command" width="413" height="212" /></a></li>
<li>Follow the prompts on the screen</li>
<li>A message should appear confirming that ComboFix was uninstalled</li>
</ol>
<hr />
<>Remove the OTL utility</>

Run OTL and hit the <>CleanUp</> button. It will remove all the programmes we have used plus itself. We will now confirm that your hidden files are set to that, as some of the tools I use will change that
<ul>
<li>Go to control panel</li>
<li>Select folder options (Appearance > Folder options in category view)</li>
<li>Select the View Tab.</li>
<li>Under the Hidden files and folders heading select <>Do not show hidden files and folders</>.</li>
<li>Click Yes to confirm.</li>
<li>Click OK.</li>
</ul>
<hr />
<img src="http://users.telenet.be/bluepatchy/miekiemoes/images/javaicon.gif" alt="Posted Image" /> Your <>Java</> is out of date. Older versions have vulnerabilities that malware can use to infect your system. Please follow these steps to remove older version of <>Java</> components and upgrade the application. <></><>Upgrading Java</>:
<ul>
<li>Go to<a title="External link" href="http://java.com/en/" rel="nofollow external"> this site</a> and click <>Do I have Java</></li>
<li>It will check your current version and then offer to update to the latest version</li>
</ul>
<hr />
<>SPRING CLEAN</> <>To manually create a new Restore Point</>
<ul>
<li>Go to <>Control Panel </>and select <>System </></li>
<li>Select <>System</></li>
<li>On the left select<> System Protection </>and accept the warning if you get one</li>
<li>Select <>System Protection Tab</></li>
<li>Select <>Create</> at the bottom</li>
<li>Type in a name i.e. Clean</li>
<li>Select <>Create</></li>
</ul>
<>Now we can purge the infected ones</>
<ul>
<li>Go <>Start > All programs > Accessories > system tools </></li>
<li>Right click <>Disc cleanup</> and select run as administrator</li>
<li>Select <>Your main drive</> and accept the warning if you get one</li>
<li>For a few moments the system will make some calculations</li>
<li>Select the <>More Options tab</></li>
<li>In the System <>Restore and Shadow Backups select Clean up</></li>
<li>Select <>Delete</> on the pop up</li>
<li>Select OK</li>
<li>Select Delete</li>
</ul>
<hr />
<>Clean your temporary files</>
<ol>
<li>Download to your Desktop - <a title="External link" href="http://www.piriform.com/ccleaner/download/portable" rel="external">CCleaner Portable</a></li>
<li>UnZip CCleaner Portable to a folder on your Desktop named CCleaner</li>
<li>Open the CCleaner Folder on your Desktop and double click CCleaner.exe (32-bit) or CCleaner64.exe (64-bit)</li>
<li>The following should be selected by default, if not, please select:
<img src="http://i52.tinypic.com/4l5a4i.png" alt="Posted Image" /></li>
<li>Click <img src="http://i56.tinypic.com/16jox2o.png" alt="Posted Image" /> and choose <img src="http://i40.tinypic.com/5x3nu8.gif" alt="Posted Image" /></li>
<li>Uncheck <img src="http://i51.tinypic.com/amuvj8.gif" alt="Posted Image" /></li>
<li>Then go back to <img src="http://i41.tinypic.com/2jb4qyb.gif" alt="Posted Image" /> and click <img src="http://i25.tinypic.com/nf47ev.gif" alt="Posted Image" /> to run it.</li>
<li>Exit CCleaner.</li>
</ol>


What's next?

1. I ly advise you,to start a thread in our Security Configuration Wizard forum, to build up your computer malware defenses.
2. It's good to know that the best way to prevent future infections is to know how to avoid them,so with this in mind I ly recommend that you read this article on how to avoid computer infections. > <a href="http://malwaretips.com/blogs/how-to-easily-avoid-pc-infections/">How to easily avoid PC infections</a>