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Possibly ConfB infection


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#1 bbutle01

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Posted 21 April 2009 - 09:50 AM

Here's the setup.
I'm the admin on a small business network. All my computers have been patched and running Symantec Endpoint protection 11.
It's a mix of xp/vista/2003 server.
About 15 machines total.

A user recently started complaining of slowness... The first thing I do is bring up taskmanager and see there's 20 run32dlls. I kill them and tell her to get back to work. It comes back an hour later.
I start digging around more, and found that she's getting this in syslog

Security Risk Found!W32.Downadup.B in File: C:\Windows\System32\ysdviuf.n by: Auto-Protect scan. Action: Delete succeeded : Access denied. Action Description: The file was deleted successfully.

This worried me. While researching this, I happen to bring up MY taskanager and I get the same things.
Looking around, they all are doing this... repeated logs and lots of run32dlls (with each having it's own random dll being run.

I downloaded norton's remover, malwarebites and bitdefender... They all 3 tell me I'm NOT infected, nothing to clean. Same results on each computer.
I go to the eyechart, and I can see all the logos... great.
I put this on one of my linux machines, and scan the network...
<hxxp://iv.cs.uni-bonn.de/wg/cs/applications/containing-conficker/>

Apparently some stupid employee has plugged an infected machine on the network. I checked the eyechart, and sure enough, Conficker B. (I need someone to help me to remove the body now)
So, now the infected machine is removed, but now every machine on my network has a bunch of run32dll's and a message in syslog for each like above. Computers are running pretty slow...
HELP!
Thanks

Oh, and I'm attaching the logs off MY computer.

Attached Files


Edited by Orange Blossom, 11 February 2013 - 04:45 AM.
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#2 bbutle01

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Posted 21 April 2009 - 04:38 PM

FYI...

I took my 'cleanest' computer on the network, pulled it off the network, ran malwarebytes, it said it was clean.

Left it off the network, restarted...
20 minutes later 35 run32dlls...

#3 bbutle01

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Posted 22 April 2009 - 08:29 AM

Well, after running trend micro housecall on a computer, it finds a bunch (200 on one machine, over 1000 on another) of entries in c:\windows\tasks...
When looking in there, they're all executing "run32dll.exe ysdviuf.n sdu983"

The file doesn't exist, but rundll32 is trying to run it anyway and when it fails, run32dlll stays in memory.

I'm pulling those out, and I'm hoping that will fix this problem.

That leaves me with questions.

1. How did those entries get on patched machines?
2. How did those get on a machine where Symantec EP was able to catch the problem.
3. Why didn't Adaware, malwarebytes, HJ or any of the other dozen things I ran see these?

#4 KoanYorel

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Posted 04 May 2009 - 11:10 PM

Hello and welcome to Bleeping Computer

We apologize for the delay in responding to your request for help. Here at Bleeping Computer we get overwhelmed at times, and we are trying our best to keep up. Please note that your topic was not intentionally overlooked. Our mission is to help everyone in need, but sometimes it takes just a little longer to get to every request for help. No one is ignored here.

If you have since resolved the original problem you were having, we would appreciate you letting us know. If not please perform the following steps below so we can have a look at the current condition of your machine.

If you have not done so, include a clear description of the problems you're having, along with any steps you may have performed so far.

Upon completing the steps below another staff member will review and take the steps necessary with you to get your machine back in working order clean and free of malware.

If you have already posted a DDS log, please do so again, as your situation may have changed.
Use the 'Add Reply' and add the new log to this thread.


Thanks and again sorry for the delay.

We need to see some information about what is happening in your machine. Please perform the following scan:
  • Download DDS by sUBs from one of the following links. Save it to your desktop.
  • Double click on the DDS icon, allow it to run.
  • A small box will open, with an explaination about the tool. No input is needed, the scan is running.
  • Notepad will open with the results.
  • Follow the instructions that pop up for posting the results.
  • Close the program window, and delete the program from your desktop.
Please note: You may have to disable any script protection running if the scan fails to run. After downloading the tool, disconnect from the internet and disable all antivirus protection. Run the scan, enable your A/V and reconnect to the internet.

Information on A/V control HERE

R,
K
The only easy day was yesterday.

...some do, some don't; some will, some won't (WR)

#5 KoanYorel

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Posted 10 May 2009 - 02:10 AM

Due to the lack of feedback This Topic is closed.

Should you need it reopened, please contact a Forum Moderator. Include the address of this thread in your request.

If you have a new issue, please start a New Topic.

This applies only to the original poster. Everyone else please begin a New Topic.

R,
K
The only easy day was yesterday.

...some do, some don't; some will, some won't (WR)




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