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Mass Mail (worm?) and other DL/UL activity

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#1 Zak McKracken

Zak McKracken

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Posted 15 August 2010 - 04:27 AM

Since a few days, I noticed my internet connection hiccups. Monitoring packets, I saw even if no programs were open, there was internet activity.
Using TCPview from sysinternals, I discovered a lot of connections on the SMTP port, and a few on HTTP and HTTPS port.
I started PeerBlock, and it blocked many servers from spreading.

The situation looked similar to other times.

I downloaded latest version of combofix and placed it on my desktop. Then:
- I turned off my pc
- I turned it on and choosed to run in Safe Mode
- started combofix in safe mode (no network support)

combofix found and deleted some files. Then combofix restarted my pc in normal mode and finished its job.

I checked the connections, and they looked ok. There was no activity.
After 10 minutes, unfortunately, the strange activity started again. Many connections on the SMTP port.

I also tryed looking into processes (with processExplorer from SysInternals): there are many svchosts instances, but they look normal.

What tools can I use to intercept and possibly destroy this virus?

I have Windows 7, 32-bit.

Thanks in advance.

+++ Update: I have stemmed the problem, by adding a rule in the windows firewall. The virus tries to make a connection on the port 443 (https) at the remote address 77.67.10.x , then (on success) it downloads something, and starts to spam a lot of emails (that is, it creates a lot of connections on many servers through the port 25).
So, for now, I have added a rule to deny access from/to IP and it works: the internet is now accessible and doesn't hiccups. Besides, as extreme solution, I have added the rule to block the port 25.
But the virus is still in my pc... so I ask your help to get rid of it.
Thank you.

Edited by Zak McKracken, 15 August 2010 - 05:28 PM.

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#2 Pandy



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Posted 18 August 2010 - 01:32 PM


Now that you have posted a log here: http://www.bleepingcomputer.com/forums/t/340920/infected-with-a-mass-mail-virus-dont-know-name/ you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a MRT Team member, nor should you ask for help elsewhere. Doing so can result in system changes which may not show in the log you already posted. Further, any modifications you make on your own may cause confusion for the helper assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

From this point on the MRT Team should be the only members that you take advice from, until they have verified your log as clean.

Please be patient. It may take a while to get a response because the MRT Team members are EXTREMELY busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT make another reply until it has been responded to by a member of the MRT Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another MRT Team member is already assisting you and not open the thread to respond.

Please be patient. It may take several days to get a response but your log will be reviewed and answered as soon as possible. I advise checking your topic once a day for responses as the e-mail notification system is unreliable.

To avoid confusion, I am closing this topic. Good luck with your log.

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