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Could crypto solve the Whois crisis?

Kevin Murphy, July 10, 2018, Domain Tech

Could there be a cryptographic solution to some of the problems caused by GDPR’s impact on public Whois databases? Security experts think so.

The Anti-Phishing Working Group has proposed that hashing personal information and publishing it could help security researchers carry on using Whois to finger abusive domain names.

In a letter to ICANN, APWG recently said that such a system would allow registries and registrars to keep their customers’ data private, but would still enable researchers to identify names registered in bulk by spammers and the like.

“Redacting all registration records which were formerly publicly available has unintended and undesirable consequences to the very citizens and residents that electronic privacy legislation intends to protect,” the letter (pdf) says.

Under the proposed system, each registry or registrar would generate a private key for itself. For each Whois field containing private data, the data would be added to the key and hashed using a standard algorithm such as SHA-512.

For items such as physical addresses, all the address-related fields would be concatenated, with the key, before hashing the combined value.

The resulting hash — a long string of gibberish characters — would then be published in the public Whois instead of the [REDACTED] notice mandated by current ICANN policy.

Security researchers would then be able to identify domains belonging to the same purported registrant by searching for domains containing the same hash values.

It’s not a perfect solution. Because each registry or registrar would have their own key, the same registrant would have different hash values in different TLDs, so it would not be possible to search across TLDs.

But that may not be a huge problem, given that bad guys tend to bulk-register names in TLDs that have special offers on.

The hashing system may also be beneficial to interest groups such as trademark owners and law enforcement, which also look for registration patterns when tracking down abuse registrants.

The proposal would create implementation headaches for registries and registrars — which would actually have to build the crypto into their systems — and compliance challenges for ICANN.

The paper notes that ICANN would have to monitor its contracted parties — not all of which may necessarily be unfriendly to spammers — to make sure they’re hashing the data correctly.

Over 750 domains hijacked in attack on Gandi

Gandi saw 751 domains belonging to its customers hijacked and redirected to malware delivery sites, the French registrar reported earlier this month.

The attack saw the perpetrators obtain Gandi’s password for a gateway provider, which it did not name, that acts as an intermediary to 34 ccTLD registries including .ch, .se and .es.

The registrar suspects that the password was obtained by the attacker exploiting the fact that the gateway provider does not enforce HTTPS on its login pages.

During the incident, the name servers for up up to 751 domains were altered such that they directed visitors to sites designed to compromise unpatched computers.

The redirects started at 0804 UTC July 7, and while Gandi’s geeks had reversed the changes by 1615 it was several more hours before the changes propagated throughout the DNS for all affected domains.

About the theft of its password, Gandi wrote:

These credentials were likewise not obtained by a breach of our systems and we strongly suspect they were obtained from an insecure connection to our technical partner’s web portal (the web platform in question allows access via http).

It’s not clear why a phishing attack, which would seem the more obvious way to obtain a password, was ruled out.

Gandi posted a detailed timeline here, while Swiss registry Switch also posted an incident report from its perspective here. An effected customer, which just happened to be a security researcher, posted his account here.

Gandi says it manages over 2.1 million domains across 730 TLDs.

Schilling, Famous Four rubbish Spamhaus “worst TLD” league

Kevin Murphy, March 17, 2016, Domain Registries

Uniregistry and Famous Four Media have trashed claims by Spamhaus that their gTLDs are are much as 75% spam.

FFM says it is “appalled” by the “wholly inaccurate” claims, while Uniregistry boss Frank Schilling said Spamhaus has “totally jumped the shark here.”

In a statement to DI today, FFM chief legal officer Oliver Smith said the spam-fighting organization’s recently launched World’s Worst TLDs list is “reckless”, adding that the numbers are:

not only wholly inaccurate, but are misleading and, potentially, injurious to the reputation of Famous Four Media and those TLDs it manages. It is particularly worrisome that Spamhaus’s “findings” seem to have been taken as gospel within certain corners of the industry, despite not being proffered with any analytical methodology in support of the same.

The Spamhaus report, which is updated daily, presents the 10 TLDs that are more spam than not.

The rank is based on a percentage of domains seen by Spamhaus that Spamhaus considers to be “bad” — that is, are advertised in spam or carry malware.

Today, Uniregistry’s .diet tops the chart with “74.4% bad domains”, but the scores and ranks can and do shift significantly day by day.

Spamhaus describes its methodology like this:

This list shows the ratio of domains seen by the systems at Spamhaus versus the domains our systems profile as spamming or being used for botnet or malware abuse. This is also not a list that retains a long history, it is a one-month “snapshot” of our current view.

The words “seen by the systems at Spamhaus” are important. If a domain name never crosses Spamhaus’s systems, it isn’t counted as good or bad. The organization is not running the whole zone file against its block-list to check what the empirical numbers are.

In important ways, the Spamhaus report is similar to the discredited Blue Coat report into “shady” TLDs last September, which was challenged by myself and others.

However, in a blog post, Spamhaus said it believes its numbers are reflective of the TLDs as a whole:

In the last 18-years, Spamhaus has built its data gathering systems to have a view of most of the world’s domain traffic. We feel the numbers shown on this list are representative of the actual full totals.

I disagree.

In the case of .diet, for example, if 74% of the full 19,000-domain zone was being used in spam, that would equate to 14,000 “bad” domains.

But the .diet zone is dominated by domains owned by North Sound Names, the Frank Schilling vehicle through which Uniregistry markets its premium names.

NSN snapped up well over 13,000 .diet names at launch, and Schilling said today that NSN owns north of 70% of the .diet zone.

That would mean either Uniregistry is a spammer, or Spamhaus has no visibility into the NSN portfolio and its numbers are way the hell off.

“Spamhaus’ assertion that 74% of the registrations in the .diet space are spam is a numerical impossibility,” Schilling said. “They totally jumped the shark here.”

NSN’s domains don’t send mail, he said.

He added that diet-related products are quite likely to appear in spam, which may help account for Spamhaus’s systems identifying .diet emails as spam. He said:

Spamhaus is a high-minded organization and we applaud their efforts but this report is so factually inaccurate it casts into doubt the validity of everything they release. Spamhaus should be smarter than this and at a minimum consult with registries (our door is open) to gain a better understanding of the subject matter they wrongly profess to be expert in.

Similarly, FFM’s .review gTLD was briefly ranked last week as the “worst” gTLD at 75.1% badness. With 66,000 domains, that would mean almost 50,000 names are spammy.

Yet it appears that roughly 25,000 .review domains are long-tail geo names related to the hotels industry, registered by a Gibraltar company called A Domains Limited, which appears to be run by AlpNames, the registry with close ties to FFM itself.

Again, if Spamhaus’s numbers are accurate, that implies the registrar and/or registry are spamming links to content-free placeholder web sites.

FFM’s Smith says the registry has been using Spamhaus data as part of its internal Registry Abuse Monitoring tool, and that its own findings show significantly less spam. Referring to .review’s 75% score, he said:

This simply does not accord with FFM’s own research, which relies heavily on data made available by Spamhaus. The reality is that, in reviewing registration data for the period 8 February to 8 March 2016, only 4.8% of registered domains have been blacklisted by Spamhaus – further, it is questionable as whether every single such listing is wholly merited. When reviewing equivalent data for the period of 1 January to 8 March 2016 across ALL FFM managed TLDs this rate averages out to a mere 3.2%.

I actually conducted my own research into the claims.

Between March 8 and March 15, I ran the whole .review zone file through the Spamhaus DBL and found 6.9% of the names were flagged as spam.

My methodology did not take account of the fact that Spamhaus retires domains from its DBL after they stop appearing in spam, so it doesn’t present a perfect apples-to-apples comparison with Spamhaus, which bases its scoring on 30 days of data.

All told, it seems Spamhaus is painting a much bleaker picture of the amount of abuse in new gTLDs than is perhaps warranted.

During ICANN meetings last week and in recent blog comments, current and former executives of rival registries seemed happy to characterize new gTLD spam as a Famous Four problem rather than an industry problem.

That, despite the fact that Uniregistry, Minds + Machines and GMO also feature prominently on Spamhaus’s list.

I would say it’s more of a low prices problem.

It’s certainly true that FFM and AlpNames are attracting spammers by selling domains for $0.25 wholesale or free at retail, and that their reputations will suffer as a result.

We saw it with Afilias and .info in the early part of the last decade, we’ve see it with .tk this decade, and we’re seeing it again now.

Registrars warn of huge domain suspension scam

Kevin Murphy, October 28, 2015, Domain Registrars

Customers of at least half a dozen large registrars been targeted by an email malware attack that exploits confusion about takedown policies.

The fake suspension notices have been spammed to email addresses culled from Whois and are tailored to the registrar of record and the targeted domain name.

Customers of registrars including eNom, Web.com, Moniker, easyDNS, NameBright, Dynadot and Melbourne IT are among those definitely affected. I suspect it’s much more widespread.

The emails reportedly look like this:

Dear Sir/Madam,

The following domain names have been suspended for violation of the easyDNS Technologies, Inc. Abuse Policy:

Domain Name: DOMAIN.COM
Registrar: easyDNS Technologies, Inc.
Registrant Name: Domain Owner

Multiple warnings were sent by easyDNS Technologies, Inc. Spam and Abuse Department to give you an opportunity to address the complaints we have received.

We did not receive a reply from you to these email warnings so we then attempted to contact you via telephone.

We had no choice but to suspend your domain name when you did not respond to our attempts to contact you.

Click here and download a copy of complaints we have received.

Please contact us by email at mailto:abuse@easydns.com for additional information regarding this notification.

Sincerely,

easyDNS Technologies, Inc.
Spam and Abuse Department
Abuse Department Hotline: 480-124-0101

The “click here” invitation leads to a downloadable file, presumably containing malware.

Of course, the best way to check whether your domain name has been genuinely suspended or not is to use it — visit its web site, use its email, etc.

As domain suspensions become more regularly occurrences, due to ICANN policies on Whois accuracy for one reason, we can only expect more scams like these.

Architelos launches new gTLD anti-abuse tool

Kevin Murphy, August 15, 2012, Domain Services

Architelos, having consulted on about 50 new gTLD applications, has refocused on its longer-term software-based game plan with the recent launch of a new anti-abuse tool for registries.

NameSentry is a software-as-a-service offering, currently being trialed by an undisclosed number of potential customers, designed to make it easier to track abusive domains.

Architelos gave us a demo of the web site yesterday.

The service integrates real-time data feeds from up to nine third-party blocklists – such as SURBL and SpamHaus – into one interface, enabling users to see how many domains in their TLD are flagged as abusive.

Users can then drill down to see why each domain has been flagged – whether it’s spamming, phishing, hosting malware, etc – and, with built-in Whois, which registrar is responsible for it.

There’s also the ability to generate custom abuse reports on the fly and to automate the sending of takedown notices to registrars.

CEO Alexa Raad and CTO Michael Young said the service can help streamline the abuse management workflow at TLD registries.

Currently, Architelos is targeting mainly ccTLDs – there’s more of them – but before too long it expects start signing new gTLD registries as they start coming online.

With many new gTLD applicants promising cleaner-than-clean zones, and with governments leaning on their ccTLDs in some countries, there could be some demand for services such as this.

NameSentry is priced on a subscription basis, based on the size of the TLD zone.

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