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Nasty Trojan downloader


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5 replies to this topic

#1 nickb911

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Posted 21 August 2011 - 08:25 PM

I have recently been infected with a trojan downloader. MBAM found Trojan BHO and removed it earlier today, but the downloader is still being found and removed everytime I run MS security essentials. The files found are Trojan Downloader: win32/tracur y (also B and Q) Also found and removed was win23/cybot!cfg.
I'm running Xp with everything as updated as can be. For security I use Microsoft security essentials, Malwarebytes antimalware, and superantispyware free edition.
Can anyone help lme get rid of this? It's driving me nuts. Thanks!

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#2 boopme

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Posted 21 August 2011 - 08:29 PM

Hello and welcome.. Let's se how oy os after this.
Run TFC by OT (Temp File Cleaner)
Please download TFC by Old Timer and save it to your desktop.
alternate download link

Save any unsaved work. TFC will close ALL open programs including your browser!
Double-click on TFC.exe to run it. If you are using Vista, right-click on the file and choose Run As Administrator.
Click the Start button to begin the cleaning process and let it run uninterrupted to completion.
Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.

I'd like us to scan your machine with ESET OnlineScan
  • Hold down Control and click on the following link to open ESET OnlineScan in a new window.
    ESET OnlineScan
  • Click the Posted Image button.
  • For alternate browsers only: (Microsoft Internet Explorer users can skip these steps)
    • Click on Posted Image to download the ESET Smart Installer. Save it to your desktop.
    • Double click on the Posted Image icon on your desktop.
  • Check Posted Image
  • Click the Posted Image button.
  • Accept any security warnings from your browser.
  • Under scan settings, check Posted Image and check Remove found threats
  • Click Advanced settings and select the following:
    • Scan potentially unwanted applications
    • Scan for potentially unsafe applications
    • Enable Anti-Stealth technology
  • ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
  • When the scan completes, push Posted Image
  • Push Posted Image, and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
  • Push the Posted Image button.
  • Push Posted Image


NOTE: In some instances if no malware is found there will be no log produced.


Rerun MBAM (MalwareBytes) like this:

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



Download Security Check from HERE, and save it to your Desktop.

* Double-click SecurityCheck.exe
* Follow the onscreen instructions inside of the black box.
* A Notepad document should open automatically called checkup.txt; please post the contents of that document.
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

#3 nickb911

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Posted 21 August 2011 - 10:50 PM

Thanks for the quick response, I ran the programs you suggested and have posted the contents below:

C:\System Volume Information\_restore{45B5E8B9-949A-471E-999D-F381DA56A2D3}\RP1\A0000047.manifest Win32/TrojanDownloader.Tracur.F trojan cleaned by deleting - quarantined

Malwarebytes' Anti-Malware 1.51.1.1800
www.malwarebytes.org

Database version: 7531

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

8/21/2011 10:33:52 PM
mbam-log-2011-08-21 (22-33-52).txt

Scan type: Quick scan
Objects scanned: 171751
Time elapsed: 3 minute(s), 2 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 1
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 4

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\.fsharproj (Trojan.BHO) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
c:\WINDOWS\system32\020000000dc00c7d1406c.manifest (Malware.Trace) -> Quarantined and deleted successfully.
c:\WINDOWS\system32\020000000dc00c7d1406o.manifest (Malware.Trace) -> Quarantined and deleted successfully.
c:\WINDOWS\system32\020000000dc00c7d1406p.manifest (Malware.Trace) -> Quarantined and deleted successfully.
c:\WINDOWS\system32\020000000dc00c7d1406s.manifest (Malware.Trace) -> Quarantined and deleted successfully.



Results of screen317's Security Check version 0.99.7
Windows XP Service Pack 3
Internet Explorer 8
``````````````````````````````
Antivirus/Firewall Check:

Windows Firewall Enabled!
ESET Online Scanner v3
Microsoft Security Essentials
Antivirus up to date!
```````````````````````````````
Anti-malware/Other Utilities Check:

Malwarebytes' Anti-Malware
CCleaner
Java™ 6 Update 23
Out of date Java installed!
Adobe Flash Player 10.1.82.76
Adobe Reader 8.3.0
Out of date Adobe Reader installed!
````````````````````````````````
Process Check:
objlist.exe by Laurent

Windows Defender MSMpEng.exe
Microsoft Security Essentials msseces.exe
Microsoft Security Client Antimalware MsMpEng.exe
``````````End of Log````````````


I hope this helps

#4 boopme

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Posted 22 August 2011 - 01:49 PM

That loks like ESEt hit it.


Important Note: Your version of 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 7 and save it to your desktop.
  • Look for "Java Platform, Standard Edition".
  • Click the "Download JRE" button to the right.
  • Read the License Agreement, and then check the box that says: "Accept License Agreement".
  • From the list, select your OS and Platform (32-bit or 64-bit).
  • If a download for an Offline Installation is available, it is recommended to choose that and save the file to your desktop.
  • Close any programs you may have running - especially your web browser.
Go to Posted Image > Control Panel, double-click on Add/Remove Programs or Programs and Features in Vista/Windows 7 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-7-windows-i586.exe to install the newest version.
  • If using Windows 7 or Vista and the installer refuses to launch due to insufficient user permissions, then Run As Administrator.
  • When the Java Setup - Welcome window opens, click the Install > button.
  • If offered to install a Toolbar, just uncheck the box before continuing unless you want it.
  • The McAfee Security Scan Plus tool is installed by default unless you uncheck the McAfee installation box when updating Java.
Note: The Java Quick Starter (JQS.exe) adds a service to improve the initial startup time of Java applets and applications but it's not necessary.
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.

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

#5 nickb911

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Posted 22 August 2011 - 03:46 PM

Looks like that did it. I have updated java then run all the full scans I can and nothing is to be found at all. WOOT! Thank you so much for your help. You are a lifesaver!

#6 boopme

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Posted 22 August 2011 - 04:19 PM

Way cool!!
If there are no more problems or signs of infection, 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 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.

Tips to protect yourself against malware and reduce the potential for re-infection:Avoid gaming sites, pirated software, cracking tools, keygens, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and malicious Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.

Keeping Autorun enabled on USB and other removable drives has become a significant security risk due to the increasing number of malware variants that can infect them and transfer the infection to your computer. To learn more about this risk, please read:
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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