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

Trojan Horse Dropper.delf.acb


  • Please log in to reply
10 replies to this topic

#1 charlesb

charlesb

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:UK
  • Local time:02:24 PM

Posted 18 February 2008 - 04:51 PM

I received an IM from an apparently trusted source "looks like your profile, smiley face, etc" with a link, which I inadvertently opened.
My PC is now sending same message to many in my address book.
I ran Housecall, AVG, AdAware, Spybot. AVG "finds" multiple instances of Trojan Horse dropper.delf.ACB. Heal process does not clean system.

Can you please help me to remove whatever it is that has infected the system?

Thanks, Charlesb


Mod Edit: Topic moved to more appropriate forum~ TMacK

Edited by TMacK, 18 February 2008 - 04:53 PM.


BC AdBot (Login to Remove)

 


m

#2 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,146 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:24 AM

Posted 18 February 2008 - 07:00 PM

Hello and welcome to BC charlesb. I will go with that this is an XP machine.
You have a high risk Downloader virus. Trojan Downloaders are typically installed without user assistance through security exploits, and can severely compromise system security. Such risks may open illicit network connections, use polymorphic tactics to self-mutate, disable security software, modify system files, and install additional malware. These risks may also collect and transmit personally identifiable information without your consent and severely degrade the performance and stability of your computer.

Please start the cleaning process with this BC Tutorial.
How to remove the Smitfraud / Generic Zlob

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 Opers 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 log and Let us know how the PC is running now.

Edited by boopme, 18 February 2008 - 07:01 PM.
Spelling

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 charlesb

charlesb
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:UK
  • Local time:02:24 PM

Posted 19 February 2008 - 06:33 AM

Thanks so much.
I followed all instructions, and at this stage all seems well.
This is the Scanlog from SUPERAntispyware:
SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 02/19/2008 at 07:49 AM

Application Version : 3.9.1008

Core Rules Database Version : 3405
Trace Rules Database Version: 1397

Scan type : Complete Scan
Total Scan Time : 01:22:29

Memory items scanned : 206
Memory threats detected : 0
Registry items scanned : 10289
Registry threats detected : 0
File items scanned : 59318
File threats detected : 0

Let's hope that the threat is gone. - at least that is what my itching ears want to hear..... Thanks for the prompt help.

#4 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,146 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:24 AM

Posted 19 February 2008 - 01:44 PM

Is all good and smiley face gone?
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 charlesb

charlesb
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:UK
  • Local time:02:24 PM

Posted 20 February 2008 - 12:58 PM

Yes, thank you.
Everything appears to be normal, no new occurences of the virus.

#6 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,146 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:24 AM

Posted 20 February 2008 - 01:26 PM

Now you should Set 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 System Restore is a protected directory, your tools can not access it to delete these bad files which sometimes can reinfect your system. 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.
  • Then go to Start > Run and type: Cleanmgr
  • Click "OK".
  • Click the "More Options" Tab.
  • Click "Clean Up" in the System Restore section to remove all previous restore points except the newly created one.

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

#7 charlesb

charlesb
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:UK
  • Local time:02:24 PM

Posted 21 February 2008 - 07:01 AM

Thank you boopme.
Have done as you suggest.
On restarting now I get the message "Windows cannot find "\653534.exe" "etc. Do you thinkt his a related issue to be concerned about?

I am really grateful for your help in resolving my problem. It seems unfair that I cannot pay for this. Can I compensate/donate. A favourite charity?

I have also installed COMODO firewall.

#8 quietman7

quietman7

    Bleepin' Janitor


  • Global Moderator
  • 50,579 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Virginia, USA
  • Local time:09:24 AM

Posted 21 February 2008 - 01:04 PM

The "Cannot find...", "Could not run..." or "Error loading..." message is usually related to a program (or malware) that was set to run at startup but has been deleted. Windows is trying to load this file but cannot locate it since the file was mostly likely removed during an anti-virus or anti-malware scan. However, an associated orphaned registry entry remains and is telling Windows to load the file when you boot up.

When Windows loads, it looks for any files associated with registry entries for programs that are set to run at startup. If the file was removed but not the registry entry, Windows will display an error message. You need to remove this registry entry so Windows stops searching for the file when it loads.

To resolve this, download Autoruns, search for the related entry and then delete it.
  • Create a new folder on your hard drive called AutoRuns (C:\AutoRuns) and extract (unzip) the file there. (click here if your not sure how to do this.)
  • Open the folder and double-click on autoruns.exe to launch it.
  • Please be patient as it scans and populates the entries.
  • When done scanning, it will say Ready at the bottom.
  • Scroll through the list and look for a startup entry related to the file(s) in the error message.
  • Right-click on the entry and choose delete.
  • Reboot your computer and see if the startup error returns.

.
.
Windows Insider MVP 2017-2018
Microsoft MVP Reconnect 2016
Microsoft MVP Consumer Security 2007-2015 kO7xOZh.gif
Member of UNITE, Unified Network of Instructors and Trusted Eliminators

If I have been helpful & you'd like to consider a donation, click 38WxTfO.gif

#9 boopme

boopme

    To Insanity and Beyond


  • Global Moderator
  • 72,146 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:NJ USA
  • Local time:09:24 AM

Posted 21 February 2008 - 01:23 PM

Thanks quietman7 :thumbsup:
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

#10 charlesb

charlesb
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:UK
  • Local time:02:24 PM

Posted 21 February 2008 - 02:54 PM

Magic. Problem resolved. Thanks to you both.

#11 quietman7

quietman7

    Bleepin' Janitor


  • Global Moderator
  • 50,579 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Virginia, USA
  • Local time:09:24 AM

Posted 21 February 2008 - 02:58 PM

Your welcome from both of us.
.
.
Windows Insider MVP 2017-2018
Microsoft MVP Reconnect 2016
Microsoft MVP Consumer Security 2007-2015 kO7xOZh.gif
Member of UNITE, Unified Network of Instructors and Trusted Eliminators

If I have been helpful & you'd like to consider a donation, click 38WxTfO.gif




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users