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TrojanDropper:Win32/Multidrop.C problem - can't resolve


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#1 techtragedy

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Posted 17 November 2009 - 08:11 PM

Microsoft Security Essentials keeps detecting and cleaning out this threat, but it keeps coming back. Here are the details:

Category: Trojan Dropper

Description: This program is dangerous and installs other programs.

Recommendation: Remove this software immediately.

Microsoft Security Essentials detected programs that may compromise your privacy or damage your computer. You can still access the files that these programs use without removing them (not recommended). To access these files, select the 'Allow' action and click 'Apply actions'. If this option is not available, log on as administrator or ask the local administrator for help.

Items:
file:C:\Documents and Settings\Mike\Local Settings\Temp\81.tmp
file:C:\Documents and Settings\Mike\Local Settings\Temp\82.tmp

I've Also noticed that in my C:\Documents and Settings\user\Application Data folder, a macromedia folder is created immediately after I delete it. This file 267b005e19.exe is created in the macromedia/Common folder. It is also listed in msconfig in the startup items, and in the registry under HKCU\Software\Microsoft\Windows\CurrentVersion\Run, there is a key that keeps coming back even if I delete it with a data value that launches that 267b005e19.exe file.

I don't know where to begin on REALLY cleaning the infection from my machine. But this one is killing me. PLEASE HELP!

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#2 Orange Blossom

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Posted 17 November 2009 - 09:53 PM

As no logs have been posted, I am shifting this topic from the specialized HiJack This forum to the Am I Infected forum.

==>PLEASE DO NOT NOW POST LOGS<== unless a log is specifically requested.
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.

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An ounce of prevention is worth a pound of cure

SpywareBlaster, WinPatrol Plus, ESET Smart Security, Malwarebytes' Anti-Malware, NoScript Firefox ext., Norton noscript

#3 rigel

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Posted 17 November 2009 - 10:04 PM

Welcome to BC... I will do my best to help you

:trumpet: 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.
:flowers: Please download RKill by Grinler

Link #1
Link #2
Link #3
Link #4

  • Before we begin, you should disable your anti-malware softwares you have installed so they do not interfere RKill running as some anti-malware softwares detect RKill as malicious. Please refer to this page if you are not sure how.
  • Download Link #1.
  • Save it to your Desktop.
  • Double click the RKill desktop icon.
    If you are using Vista please right click and run as Admin!
  • A black screen will briefly flash indicating a successful run.
  • If this does not occur please delete that application and download Link #2.
  • Continue process until the tool runs.
  • If the tool does not run from any of the links tell me about it.
:thumbsup: Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • 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 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 and exit MBAM.
Note:
-- If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs

"In a world where you can be anything, be yourself." ~ unknown

"Fall in love with someone who deserves your heart. Not someone who plays with it. Will Smith


#4 techtragedy

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Posted 18 November 2009 - 12:16 AM

I've completed the TFC, rkill, Malwarebytes scan and removal process 3 times now. The past 2 times there is one entry in the results that persists, and requires rebooting to remove. However, when I select the option to reboot, it takes a very long time to do it. Then after rebooting, the same entry is there after scanning again. Here is the one thing I can't seem to get rid of:

Trojan.Agent Registry Value HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rundll32.exe

Please tell me the next step I need to take to get rid of this. Rebooting when asked to do so by the Malwarebytes program doesn't seem to be working.

-------EDIT-----------

I realized that I had changed permissions on the folder in the registry in a previous effort to manually remove the infection. There was a file that kept coming back every time I deleted it and restarted regedit or rebooted. However, since changing the folder permissions again and setting my username and system with full control, and running Malwarebytes scan and removal and rebooting, it appears that the system is now clear of infections (according to last Malwarebytes scan). However, I'm still a bit concerned that there might be some trace of infection or a vulnerability present that is hidden in a way that the scanners can't find it. So if there is some way I can post logs as mentioned in a previous reply to my topic and have someone look over them to see if everything is truly in the clear, I would appreciate it. Please just let me know what I need to do. Thanks!

Edited by techtragedy, 18 November 2009 - 02:40 PM.


#5 rigel

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Posted 19 November 2009 - 07:24 AM

I would run a few more scans before I would say you are clean.

Please download and scan with SUPERAntiSpyware Free
  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If it will not start, go to Start > All Prgrams > SUPERAntiSpyware and click on Alternate Start.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • In the Main Menu, click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and 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 a scan just yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with SUPERAntiSpyware as follows:
  • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • 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.

Install RootRepeal

Click here - Official Rootrepeal Site, and download RootRepeal.zip. I recommend downloading to your desktop.
Fatdcuk at Malwarebytes posted a comprehensive tutorial - Self Help guide can be found here if needed.: Malwarebytes Removal and Self Help Guides.
Click RootRepeal.exe to open the scanner.
Click the Report tab, now click on Scan. A Window will open asking what to include in the scan.
Check the following items:
Drivers
Files
Processes
SSDT
Stealth Objects
Hidden Services

Click OK
Scan your C Drive (Or your current system drive) and click OK. The scan will begin. This my take a moment, so please be patient. When the scan completes, click Save Report.
Name the log RootRepeal.txt and save it to your Documents folder - (Default folder).
Paste the log into your next reply.

"In a world where you can be anything, be yourself." ~ unknown

"Fall in love with someone who deserves your heart. Not someone who plays with it. Will Smith





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