I'm seeing a new spam varient that is clearly designed to get
past SURBL. It is an HTML message that contains many (50~100)
'invisible' links; links that have no target text, just:
<A href="http://garbage.sitename.tld"></A>
The intention is clear, they want to fill up the 20 'slots' of
the spamcop_uri_limit with their junk links so the real "payload"
URL can slip past unchecked. That's playing a statistical game,
there's a 1 in 20 chance of the "payload" getting picked by the
randomizer but that means that 95% slip by.
To add insult to injury, they're tossing in random "\r" (ASCII-CR)
characters into the "payload" hostname to try to break spamassasin's
URI parsing.
Is it time to create rules to penalize large numbers of 'invisible'
links?
The one thing that has me worried is that people may just start
cranking up the spamcop_uri_limit value to do a brute-force response
to this trash (or have a simple-minded client that doesn't have
that kind of limit). This will add an ever-increasing load on the
SURBL dns servers. I'm already seeing a steady-state average of
130 queries/second against my two servers (with spikes in the 150~175)
range. The trend has been a steady increase (passed the 100 Q/S mark
last fall).
--
Dave Funk University of Iowa
<dbfunk (at) engineering.uiowa.edu> College of Engineering
319/335-5751 FAX: 319/384-0549 1256 Seamans Center
Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{
Dear eBay:
Wow, your form letter has changed my mind. Your security is perfect. Your
commitment to security is stellar. Running an open redirector is a great
idea. Sorry I didn't see the light earlier.
However, on a new topic, I was shocked and dismayed that eBay is allowing
and assumingly SUPPORTING pornography to be distributed through your
website. Does this include child pornography or is that only in Europe and
places where the age of consent for pornography is under 18?
Please advise based on the following link from eBay --WARNING: The following
pages contains naked photos:
http://cgi4.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=RedirectToDomain&Doma…
What is the meaning of this? eBay is facilitating porn now?
OK, now that I have your attention maybe this extreme last resort will
ACTUALLY get you to forward this to someone at your company with an
understanding of phishing and security that is slightly higher than the
Trust and Safety department?
If not, I give up and wish you well in your support of the child pornography
industry that your company is facilitating by turning a blind eye to glaring
security issues.
Sincerely,
Kevin A. McGrail
----- Original Message -----
From: "eBay Customer Support" <rswebhelp(a)ebay.com>
To: "Kevin A. McGrail" <kmcgrail(a)pccc.com>
Sent: Saturday, February 26, 2005 12:06 PM
Subject: RE: SP91011 your recent report to eBay's Trust and Safety
Department (KMM157050156V37604L0KM)
> Hello,
>
> Thank you for writing back.
>
> I truly apologize if you felt we were not concerned about the email you
> received. We are aware of the potential for fraud that these emails
> pose.
>
> Let me assure you that we do work actively and aggressively in
> partnership with many agencies, ISP's, and law enforcement groups to
> investigate these fraudulent entities. Please keep in mind that eBay is
> a public company and not associated with any legislative or police
> entity. We rely on the same agencies you do to pursue these fraudulent
> activities. We are very much concerned about our member's safety, but we
> cannot control the actions of those intent on committing fraud.
>
> If you have already received a spoofed email once, your email address
> has already been harvested. Sadly, you may continue to receive spoofed
> emails for some time as these groups migrate from ISP to ISP setting up
> fraudulent sites or sending fraudulent emails.
>
> We advise you to be very cautious of all email messages that ask you to
> submit information such as your credit card number or your email
> password. eBay (and most other Internet companies) will never ask you
> for sensitive personal information such as passwords, bank account or
> credit card numbers, Personal Identification Numbers (PINs), or Social
> Security numbers in an email. If you ever need to provide information to
> eBay please open a new Web browser, type www.ebay.com, and click on the
> "site map" link located at the top the page to access the eBay page you
> need.
>
> To keep your eBay experience safe, we have set up a new tutorial about
> Spoof Emails to educate our members spotting a fake email. To check it
> out, please click on the help link located at the top of all eBay page.
> Once the help window appears, click on the link to eBay's Security
> Center. From the Security Center you will find a variety of safety
> related links. On the right hand side you will see a link to "Protect
> yourself from spoof emails".
>
> Help > Security Center > Protect yourself from spoof emails
>
> Once again, thank you for alerting us to the spoof email you received.
> Your vigilance helps us ensure that eBay remains a safe and vibrant
> online marketplace.
>
>
> Regards,
>
> Marcel
> eBay SafeHarbor
> Investigations Team
> ______________________________
> eBay Inc.
> The World's Online Marketplace®
> *******************************************
>
> Important: eBay will not ask you for sensitive personal information
> (such as your password, credit card and bank account numbers, Social
> Security numbers, etc.) in an email. Learn more account protection tips
> at:
>
> http://pages.ebay.com/help/confidence/isgw-account-theft-reporting.html
>
> _____________________________________________
>
> For our latest announcements, please check:
>
> http://www2.ebay.com/aw/announce.shtml
> _____________________________________________
>
> In order to better serve you, we'd occasionally like to
> request feedback on our service. If you would rather
> not participate, please click on the link below and send
> us an email with the word "REMOVE" in the subject line.
> If that does not work, please send an email to the
> email address below. Your request will be processed
> within 5 days.
>
> mailto:cssremove@ebay.com
>
> *******************************************
>
Let me know and we could forward Kevin's post to the SPAM-L list. That would
create some preasure ;)
--Chris (Top posting because of my stupid MUA!!!)
> Thanks Kevin,
> I'm asking around if anyone has contacts at eBay.
I've heard back from some folks at eBay that they're now working
on this issue.
Jeff C.
Hello SURBL Team,
Please review linkshield(dot)com. It's a URL cloaking service but no
abuse policy, etc. It may have legit uses but their service may actually
benefits spammers.
Just wanted to get everyone's opinion :-)
-RD
I'm asking here because I know some of you probably can figure this one out.
My Wife owns raogk.org (Random Acts Of Genealogical Kindness) and has a
person who is having e-mail issues.
A bit of background. I designed the full backend of this site which once
you figure out the country,state,county of where you're wanting
information you click on the volunteers name and a form pops up which
allows you to enter your name/e-mail and what you want this person to
lookup. And once it is sent it sends you a BCC of what you asked.
Anyway, this one person is using MSN. And is not getting his BCC's we've
had him do a complete search through his Outlook Express for the subject
of these. Nada.
And we've had no complaints from anyone else using MSN, so doubt it is
the issue.
Could this person be running something like an e-mail filter which is
eatting his BCCs? Any of you heard of this? We're not sure what is
running on this persons computer, so unknown if or what could be causing
this.
I'm out of ideas.
We have the headers from some test messages we had this person do.
Funny thing is they're getting all the other @raogk.org e-mail.
Please include the raogk-admin(a)raogk.org address if you reply.
Thanks,
-Doc
This is a follow-up to my initial discovery that eBay has it's own redirector and this redirector was now showing up in Phishing scams.
Despite my adamant, fervent & rabid inquiries, eBay has done nothing. With the rise of the use of the redirector on eBay and this more obscure url now being used, I believe even more phish-aware users would be caught:
http://cgi4-munged.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=RedirectToDoma…
Anyone who knows anyone at eBay that understands security should email them and tell them to turn this redirector OFF.
In the meantime, here's an SA Rule to help catch it which I would appreciate feedback about:
# This rule is to mark emails using the exploit of the eBay redirector
uri KAM_EBAYREDIR /.*.ebay.com.*RedirectToDomain/i
describe KAM_EBAYREDIR Attempted use of eBay redirector - high probability of fraud
score KAM_EBAYREDIR 7.0
More posted at: http://www.peregrinehw.com/downloads/SpamAssassin/contrib/KAM.cf
Regards,
KAM
>
>Jeff Chan wrote:
>
>> I'm not getting matches either. Let's ask Dallas to please look
>> into it for us.
>
>Alright! I noticed spam got hits from SURBL-lists anyway (as
>you pointed
>out in your other message).
>
>I'll wait report my spam-mails until the problems are solved.
>
I sent the Ninja in charge an email. We recently did an update that may have
messed up the public one.
--Chris
Rob McEwen wrote:
>> http://cgi4.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=RedirectToDomain&Doma
>> inUrl=http://mymt.co.kr/.cgi-bin/eBaySuspension/signin.ebay.com/aw->cgi/sec
> ure/eBayISAPI.dllSignIn-ssPageName->hhsin.php?MfcISAPICommand=SignInFPP&Usin
> gSSL=1&email=
>
>> Erm, it's called a redirector. Did you try the
>> URL? ebay's site redirects
>> to the URL in the DomainURL parameter.
>
> Whatever you call it, it's bad news for any parser which might not
> grab and extract the referenced URL for SURBL checking.
>
> Also, this leads to additional questions:
>
> (1) Are there legitimate "business purposes" for ebay to have such a
> redirector in the first place?
To a certain limited extent, yes
> (2) If so, are there legitimate reasons for such a redirector to EVER
> show up in legitimate e-mails?
To that extent, yes
> (3) If not, does anyone know of a "clearinghouse" page where ALL such
> types of redirectors are listed so that rules could be built to block
> e-mails containing these (using rules-based blocking)? Also, are
> there already SA rules for such?
>
> Rob McEwen
eBay should certainly realize that they are imparting a degree of authority to URLs that are redirected in this manner. They may even be liable for damages. Best practices probably dictate that they keep a list of URLs that are legitimate redirection destinations, and limit redirection to those URLs - on attempts to feed the redirector any other URL, they should pop up big ugly error messages saying "someone's trying to phish you (or maybe we forgot to update our list)"
Matthew.van.Eerde (at) hbinc.com 805.964.4554 x902
Hispanic Business Inc./HireDiversity.com Software Engineer
perl -e"map{y/a-z/l-za-k/;print}shift" "Jjhi pcdiwtg Ptga wprztg,"
Hi,
Is there something wrong with the SURBL-checker at
http://www.rulesemporium.com/cgi-bin/uribl.cgi ?
I get no matches of any domains i'm testing. Even with spam-domains that
hits the multi-list isn't listed as blocked.
Is this problem related to the "FP-rate" thread?
/ Martin