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HELP!! Confliker attack?
we had an outbreak on campus today, all the clients with symantec endpoint protection installed started getting pop-ups saying it found the downadup.b virus and it was cleaned by deletion, although, the pop ups never ceased! we also got notification that endpoint was blocking traffic from certain ip's on and around campus.
At this point the virus had spread all across campus. i enabled windows firewall on our client machines via group policy to stop replication, but my servers are infected! i ran the removal tool, ran microsofts patch (again, i think) and all seemed to be fine, i could get to windows update, symantec sites, etc. but when i went to check on my servers again, i was unable to get to symantecs site or windows update... characteristics of the worm returned!
This is the strange part. Our xp machines have already had the microsoft patch installed, why are my machines getting infected? and my servers?? after removal and patch, the virus came back?!?
is it a possible variant? anyone seen this before? any help would be much appreciated.
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Answers
Conflicker in general very difficult to remove in the best of circumstances. Problem with Confilcker it can be 'upgraded' to later version of the virus by the authors when the infected computer 'reports back' to the servers conflicker upgrades from.
Best site to help you with this is the Conficker Work Group.
Repair tools are list on their site with the link below.
http://www.confickerworkin
I've had a 50% success rate in removing the virus without re-infection. But they were isolated PCs I was able to remove from the network. Other 50% I ended up formatting because I wasnt 100% sure they were conflicker free.
we currently do not have av software on our servers... in the past it ended up being a pain in the neck. at this point it seems absolutely necessary, due to the fact that i keep removing the virus, everything checks out ok for all of an hour and then returns...even with the microsoft patch installed. I thought the patch was supposed to prevent future exploits?
any av software you could recommend? we currently use symantec endpoint protection on our clients, is that safe to install on the servers?
I've had a little experience with Symantec, found it a bit hungry on the resources when installed on the servers, but it did work quite well nonetheless.
Personally we use Trendmicro for our AV on our servers and in another location we use Sophos antivirus.
http://www.trendmicro.com.
http://www.sophos.com/prod
Hope this helps.
Symantec is still reputable antivires software. Do you have a licensing agreement with them for your servers?
you are taking very risk by not installing AV!!
i was using Norton corporate edition before, but i changed to ESET now, but if you have certain budget limitation you can try with corporate edition or SEP
there was lots of reviews and were suggesting NOD32
check this
http://forums.cnet.com/520
http://www.hardforum.com/a
http://www.pcmag.com/artic
The infection does appear rather difficult to remove, but this tool has been described
as the only tool that can really remove it >
"Remove Downadup from infected computers":
http://www.bdtools.net/
Another option is the Conficker Removal Tool:
http://www.sophos.com/prod
Ah, there was a previous case with an 'accepted solution' at E_E in August, where the second option above was used with success.
Please scroll to the comment by "demazter" which suggested this was the best tool for dealing with Conficker >
http://www.sophos.com/prod
You'll probably wish to study his successful Group Policy used to stop it spreading. It's attached with appropriate comments >
"How to remove WORM/Conficker.M from network and cure the symptoms caused by it?":
http://www.experts-exchang
What a pain. apparently, the infection was able to update itself and replicate across our domain in hours... at least to the machines without symantec installed. we had our machines patched for this outbreak in march, but obviously still prone to attack in september.
it wreaked havoc! locked out accounts, killed our file servers' rpc service which then killed file sharing, logons would take 10 minutes due to the amount of failed auth. attempts on our dc's. the only way to truly get rid of the damn thing was to install av software on EVERY machine. we were able to contain and rid ourselves of the bugger this afternoon.
although, they have their short comings, symantec's endpoint protection really did the trick. the central management/deployment (although deployment was a bit tricky on a domain like ours...) made it relatively easy to get out to and report on the clients. some of the legacy machines on campus are a bit sluggish at startup, but relatively the same. and the unmanaged client on the servers is nice because it adds the appropriate exclusions at install.
lesson learned: install av software on your machines
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by: alienvoicePosted on 2009-09-23 at 17:20:43ID: 25409269
To check if it is a conficker infection go to this link and click on 'check for infection'. Can determine if your infected/what type of infection variant of conflicker you have.
http://www.confickerworkin