Re: SID 32174 BLACKLIST DNS request for known malware domain sr.symcd.com - Osx.Backdoor.iWorm

[Alex McDonnell <amcdonnell () sourcefire com>]

Sid 32173 32174 have been deleted. The traffic these rules matched on was
erroneously marked as being malicious.

Alex McDonnell
TALOS
On Oct 15, 2014 9:21 AM, "Y M" <snort () outlook com> wrote:

> Same here, issue is not restricted to Firefox and does not seem OS/device
> specific. We are getting these on SID:32173 as well.
>
> YM
>
> > From: gkay () netconsult co uk
> > To: rmcglamery () pencor com; snort-sigs () lists sourceforge net
> > Date: Wed, 15 Oct 2014 12:47:11 +0000
> > Subject: Re: [Snort-sigs] SID 32174 BLACKLIST DNS request for known
> malware domain sr.symcd.com - Osx.Backdoor.iWorm
> > Our side not restricted to FireFox. However, looking at the other
> traffic between our clients and the IP address 23.43.75.27 it seems to be
> OCSP requests.
> > sr.symcd.com
> > gtssl2-ocsp.geotrust.co
> > gtglobal-ocsp.geotrust.com
> > evcs-ocsp.ws.symantec.com
> > svrsecure-oracle-ocsp.verisign.com
> > volusion-ocsp.digitalcertvalidation.com
> >
> >
> > All requests regardless of the URL used have similar format in URI and
> download a file with the same name as the URI.
> > Hope this helps in some way
> >
> > Greg Kay
> >
> >
> > -----Original Message-----
> > From: McGlamery, Russell [mailto:rmcglamery () pencor com]
> > Sent: 15 October 2014 13:24
> > To: McGlamery, Russell; Greg Kay; 'snort-sigs () lists sourceforge net'
> > Subject: Re: [Snort-sigs] SID 32174 BLACKLIST DNS request for known
> malware domain sr.symcd.com - Osx.Backdoor.iWorm
> > I updated Firefox to version 33 on some of the nodes that were
> triggering the alerts and the alerts stopped.
> > --
> > Russ
> >
> >
> >
> >
> >
> >
> > On 10/15/14, 8:02 AM, "McGlamery, Russell" <rmcglamery () pencor com>
> wrote:
> > > This looks line its something related to older versions of FireFox, I
> > > am trying to verify now.
> > >
> > > -----
> > > Russ
> > >
> > >
> > >
> > >
> > > On 10/15/14, 7:24 AM, "Greg Kay" <gkay () netconsult co uk> wrote:
> > >
> > > > Hi,
> > > >
> > > > We are getting a large amount of hits for this domain which appears to
> > > > be Symantec owned. Fairly certain this is a false positive.
> > > >
> > > > * 1:32174 <-> ENABLED <-> BLACKLIST DNS request for known malware
> > > > domain sr.symcd.com - Osx.Backdoor.iWorm (blacklist.rules)
> > > > * 1:32173 <-> ENABLED <-> BLACKLIST DNS request for known malware
> > > > domain s2.symcb.com - Osx.Backdoor.iWorm (blacklist.rules)
> > > >
> > > > IP address is associated with geotrust, thawte and verisign as well.
> > > >
> > > > Have checked the references to virustotal but haven't seen anything
> there
> > > > suggesting its bad. Maybe I'm missing something.
> > > > www.virustotal.com/en/domain/s2.symcb.com/information/
> > > > www.virustotal.com/en/domain/sr.symcd.com/information/
> > > >
> > > >
> > > >
> > > > Thanks
> > > >
> > > > Greg Kay
> > > >
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