Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

explorer.exe virus


  • Please log in to reply
7 replies to this topic

#1 sixfivetwo

sixfivetwo

  • Members
  • 4 posts
  • OFFLINE
  •  
  • Local time:08:02 PM

Posted 16 February 2010 - 11:44 PM

Good evening,

So, I've got a bug I can't seem to shake, nor find much about.

I first noticed it when a window opened on my desktop warning me that my computer was going to reboot in a minute. I tried to grab whatever it was in taskmgr, but was not quick enough. After the reboot, I noticed a second instance of explorer.exe in taskmgr. It's description is Avira Anti Virus 9.1 Premium Edition. I don't use, nor have I ever used Avira anything. Killing the process will bring up another, and sometimes two or three instances of this avira explorer.exe

This is my taskmgr window:
Posted Image

The only other effect this has had is an occasional notification that some .sql file can't be run (I'll try to record the exact message, I can't seem to remember it)

I'm running Windows 7 Home Premium (32-bit)

I've scanned with avg and Spybot, both have not found this thing. It doesn't seem to be doing anything, but I'd rather keep my system clean and not take chances.

Any advice?

BC AdBot (Login to Remove)

 


#2 thejakenixon

thejakenixon

  • Members
  • 1 posts
  • OFFLINE
  •  
  • Local time:06:02 PM

Posted 17 February 2010 - 12:12 PM

What I did (I had the same problem): Put it in compatability mode for Windows 95, unchecked the Read Only box, Changed all of its permissions to Deny, then I was able to see it under the file location that the right click menu of that process, I did a shift-delete on that to open up the "The file can not be deleted because it is open in Antivira blah blah blah", then in task manager i right clicked and said "End Process Tree then confirmed that and immediately pressed Try Again for the Shift-Delete and it deleted it. Hooray for a fast computer again. Oh I also set the priority to low (again, via the right click context menu).

If you have any questions please reply again! I have this page bookmarked and will return every few hours or so I guess.

#3 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,740 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:02 PM

Posted 17 February 2010 - 12:31 PM

This may also be the rogue AntiVir virus..

Next run MBAM (MalwareBytes):

NOTE: Before saving MBAM please rename it to zztoy.exe....now save it to your desktop.

Please download Malwarebytes Anti-Malware and save it to your desktop.

alternate download link

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. Temporarily disable such programs or permit them to allow the changes.
  • 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 definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.
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

#4 sixfivetwo

sixfivetwo
  • Topic Starter

  • Members
  • 4 posts
  • OFFLINE
  •  
  • Local time:08:02 PM

Posted 17 February 2010 - 02:29 PM

Firstly, I ran the Malwarebytes scan; the resulting log reads as:

[codebox]Malwarebytes' Anti-Malware 1.44
Database version: 3748
Windows 6.1.7600
Internet Explorer 8.0.7600.16385

2/17/2010 2:20:38 PM
mbam-log-2010-02-17 (14-20-38).txt

Scan type: Quick Scan
Objects scanned: 99801
Time elapsed: 3 minute(s), 24 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: 3

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:
C:\Users\Paul\AppData\Roaming\logs.dat (Bifrose.Trace) -> Quarantined and deleted successfully.
C:\Users\Paul\AppData\Local\Temp\UuU.uUu (Malware.Trace) -> Quarantined and deleted successfully.
C:\Users\Paul\AppData\Local\Temp\XxX.xXx (Malware.Trace) -> Quarantined and deleted successfully.
[/codebox]

Second, I tried Mr. Nixon's method (something of which I'd been attempting myself), which appears to have worked: the illegitimate explorer.exe is gone. I'm still not confident that the entire infection is removed; more likely that it is no longer functioning, so I'd like to know what this Malwarebytes log tells.

Thanks for the aid, I was not expecting such expeditious replies.

#5 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,740 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:02 PM

Posted 17 February 2010 - 03:01 PM

Well what these are, are backdoor Trojans, Botnets, and IRC Bots are very dangerous because they compromise system integrity by making changes that allow it to by used by the attacker for malicious purposes. Rootkits are used by Trojans to conceal its presence (hide from view) in order to prevent detection of an attacker's software and make removal more difficult. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. They can disable your anti-virus and security tools to prevent detection and removal. Remote attackers use backdoors as a means of accessing and taking control of a computer that bypasses security mechanisms. This type of exploit allows them to steal sensitive information like passwords, personal and financial data which is send back to the hacker.


Due to their nature we sould run another scan.
Next run ATF and SAS: If you cannot access Safe Mode,run in normal ,but let me know.

Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

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 logs and Let us know how the PC is running now.
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

#6 sixfivetwo

sixfivetwo
  • Topic Starter

  • Members
  • 4 posts
  • OFFLINE
  •  
  • Local time:08:02 PM

Posted 17 February 2010 - 06:23 PM

I have the log from the SUPER scan, everything else ran flawlessly:

SUPERAntiSpyware Scan Log[url="http://www.superantispyware.com/?rid=3324"]http://www.superantispyware.com[/url]Generated 02/17/2010 at 06:17 PMApplication Version : 4.33.1000Core Rules Database Version : 4596Trace Rules Database Version: 2408Scan type       : Complete ScanTotal Scan Time : 02:46:43Memory items scanned      : 352Memory threats detected   : 0Registry items scanned    : 6322Registry threats detected : 0File items scanned        : 375764File threats detected     : 13Adware.Tracking Cookie	D:\Documents and Settings\Administrator\Cookies\administrator@247realmedia[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@ads.pointroll[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@advertising[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@atdmt[2].txt	D:\Documents and Settings\Administrator\Cookies\administrator@collective-media[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@doubleclick[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@eas.apm.emediate[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@ext-us.bestofmedia[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@oasn04.247realmedia[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@pointroll[2].txt	D:\Documents and Settings\Administrator\Cookies\administrator@revsci[1].txt	D:\Documents and Settings\Administrator\Cookies\administrator@smartadserver[2].txt	D:\Documents and Settings\Administrator\Cookies\administrator@xiti[1].txt

The rogue explorer.exe has not returned, and from the looks of the SUPER scan, I posit it might be gone?

#7 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,740 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:02 PM

Posted 17 February 2010 - 09:47 PM

This looks good... .. Give it a day and if all is good Set a new Restore Point.

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.

Create a New Restore Point in Vista or Windows 7 and Disk Cleanup in Vista.
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

#8 sixfivetwo

sixfivetwo
  • Topic Starter

  • Members
  • 4 posts
  • OFFLINE
  •  
  • Local time:08:02 PM

Posted 17 February 2010 - 10:14 PM

Thanks for the help Boopme, I'm very grateful.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users