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Remote attack - Files gone


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#1 Mr S.

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Posted 06 September 2011 - 05:59 PM

I visited a customer's site today. Here are the symptoms of the attack:

1. ALL user files are gone.
2. Any attempt to run a program presents screens as if the program is being run for the first time.
3. The username was changed to "us". There are user files for us, us.server and us.server.oo
4. The attack seems to have originated through an RDP connection.
5. The user was infected numerous times with trojans because of his stupid habit of looking at porn emails.
6. I have removed the drive from his workstation and I'm able to view it attached via usb enclosure.

Do the symptom described in 3 and 4 point to a specific type of attack?
Is there anything that can be done to recover the user files?

Please - no useless banal comments. Just constructive and knowledgeable advice and suggestions.

Thank you.
Mark

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#2 Broni

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Posted 06 September 2011 - 07:54 PM

Welcome aboard Posted Image

Let's see, if we can recover your missing features.
Download and run UnHide
Let me know, if it worked.

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.

=============================================================================

Please download MiniToolBox and run it.

Checkmark following boxes:
  • Report IE Proxy Settings
  • Report FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List last 10 Event Viewer log
  • List Installed Programs
  • List Users, Partitions and Memory size
Click Go and post the result.

=============================================================================

Download Malwarebytes' Anti-Malware (aka MBAM): https://www.bleepingcomputer.com/download/malwarebytes-anti-malware/ to your desktop.

* Double-click mbam-setup.exe and follow the prompts to install the program.
* At the end, be sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select Perform quick scan, then click Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad.
* Post the log back here.

Be sure to restart the computer.

The log can also be found here:
C:\Documents and Settings\Username\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\Logs\log-date.txt
Or at C:\Program Files\Malwarebytes' Anti-Malware\Logs\log-date.txt

=============================================================================

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 be sure to re-enable your anti-virus, Firewall and any other security programs you had disabled.

IMPORTANT! If for some reason GMER refuses to run, try again.
If it still fails, try to UN-check "Devices" in right pane.
If still no joy, try to run it from Safe Mode.

My Website

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My help doesn't cost a penny, but if you'd like to consider a donation, click p22001735.gif


 


#3 Mr S.

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Posted 06 September 2011 - 08:10 PM

Thank you for your reply. I'm familiar with the steps that you have posted. I'm reluctant to perform them before I have a better understanding of what has happened especially since all of the files for the user are missing. Installing the long list of programs that you provided would be detrimental to retrieving them if they are deleted.

As I mentioned in my point #3, there are 3 new user directories. I'd like to know if anyone is familiar with the purpose of these directories with regard to a computer hijack. I am in the process of a non-destructive search of the drive to determine if the user files are hidden.




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