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The Chinese company in charge of handing out domain names ending in “.top” has been given until mid-August 2024 to show that it has put in place systems for managing phishing reports and suspending abusive domains, or else forfeit its license to sell domains. The warning comes amid the release of new findings that .top was the most common suffix in phishing websites over the past year, second only to domains ending in “.com.”
Image: Shutterstock.
On July 16, the Internet Corporation for Assigned Names and Numbers (ICANN) sent a letter to the owners of the .top domain registry. ICANN has filed hundreds of enforcement actions against domain registrars over the years, but in this case ICANN singled out a domain registry responsible for maintaining an entire top-level domain (TLD).
Among other reasons, the missive chided the registry for failing to respond to reports about phishing attacks involving .top domains.
“Based on the information and records gathered through several weeks, it was determined that .TOP Registry does not have a process in place to promptly, comprehensively, and reasonably investigate and act on reports of DNS Abuse,” the ICANN letter reads (PDF).
ICANN’s warning redacted the name of the recipient, but records show the .top registry is operated by a Chinese entity called Jiangsu Bangning Science & Technology Co. Ltd. Representatives for the company have not responded to requests for comment.
Domains ending in .top were represented prominently in a new phishing report released today by the Interisle Consulting Group, which sources phishing data from several places, including the Anti-Phishing Working Group (APWG), OpenPhish, PhishTank, and Spamhaus.
Interisle’s newest study examined nearly two million phishing attacks in the last year, and found that phishing sites accounted for more than four percent of all new .top domains between May 2023 and April 2024. Interisle said .top has roughly 2.76 million domains in its stable, and that more than 117,000 of those were phishing sites in the past year.
Source: Interisle Consulting Group.
ICANN said its review was based on information collected and studied about .top domains over the past few weeks. But the fact that high volumes of phishing sites are being registered through Jiangsu Bangning Science & Technology Co Ltd. is hardly a new trend.
For example, more than 10 years ago the same Chinese registrar was the fourth most common source of phishing websites, as tracked by the APWG. Bear in mind that the APWG report excerpted below was published more than a year before Jiangsu Bangning received ICANN approval to introduce and administer the new .top registry.
Source: APWG phishing report from 2013, two years before .top came into being.
A fascinating new wrinkle in the phishing landscape is the growth in scam pages hosted via the InterPlanetary File System (IPFS), a decentralized data storage and delivery network that is based on peer-to-peer networking. According to Interisle, the use of IPFS to host and launch phishing attacks — which can make phishing sites more difficult to take down — increased a staggering 1,300 percent, to roughly 19,000 phishing sites reported in the last year.
Last year’s report from Interisle found that domain names ending in “.us” — the top-level domain for the United States — were among the most prevalent in phishing scams. While .us domains are not even on the Top 20 list of this year’s study, “.com” maintained its perennial #1 spot as the largest source of phishing domains overall.
A year ago, the phishiest domain registrar by far was Freenom, a now-defunct registrar that handed out free domains in several country-code TLDs, including .tk, .ml, .ga and .cf. Freenom went out of business after being sued by Meta, which alleged Freenom ignored abuse complaints while monetizing traffic to abusive domains.
Following Freenom’s demise, phishers quickly migrated to other new low-cost TLDs and to services that allow anonymous, free domain registrations — particularly subdomain services. For example, Interisle found phishing attacks involving websites created on Google’s blogspot.com skyrocketed last year more than 230 percent. Other subdomain services that saw a substantial growth in domains registered by phishers include weebly.com, github.io, wix.com, and ChangeIP, the report notes.
Source: Interisle Consulting.
Interisle Consulting partner Dave Piscitello said ICANN could easily send similar warning letters to at least a half-dozen other top-level domain registries, noting that spammers and phishers tend to cycle through the same TLDs periodically — including .xyz, .info, .support and .lol, all of which saw considerably more business from phishers after Freenom’s implosion.
Piscitello said domain registrars and registries could significantly reduce the number of phishing sites registered through their services just by flagging customers who try to register huge volumes of domains at once. Their study found that at least 27% of the domains used for phishing were registered in bulk — i.e. the same registrant paid for hundreds or thousands of domains in quick succession.
The report includes a case study in which a phisher this year registered 17,562 domains over the course of an eight-hour period — roughly 38 domains per minute — using .lol domains that were all composed of random letters.
ICANN tries to resolve contract disputes privately with the registry and registrar community, and experts say the nonprofit organization usually only publishes enforcement letters when the recipient is ignoring its private notices. Indeed, ICANN’s letter notes Jiangsu Bangning didn’t even open its emailed notifications. It also cited the registry for falling behind in its ICANN membership fees.
With that in mind, a review of ICANN’s public enforcement activity suggests two trends: One is that there have been far fewer public compliance and enforcement actions in recent years — even as the number of new TLDs has expanded dramatically.
The second is that in a majority of cases, the failure of a registry or registrar to pay its annual ICANN membership fees was cited as a reason for a warning letter. A review of nearly two dozen enforcement letters ICANN has sent to domain registrars since 2022 shows that failure to pay dues was cited as a reason (or the reason) for the violation at least 75 percent of the time.
Piscitello, a former vice president of security at ICANN, said nearly all breach notices sent out while he was at ICANN were because the registrar owed money.
“I think the rest is just lipstick to suggest that ICANN’s on top of DNS Abuse,” Piscitello said.
KrebsOnSecurity has sought comment from ICANN and will update this story if they respond.
ICANN said most of its investigations are resolved and closed through the initial informal resolution stage, and that hundreds of enforcement cases are initiated during this stage with the contracted parties who are required to demonstrate compliance, become compliant, and/or present and implement remediation plans to prevent the recurrence of those enforcement issues.
“It is important to take into account that, prior to issuing any notice of breach to a registrar or registry operator, ICANN Compliance conducts an overall contractual compliance ‘health check’ of the relevant contracted party,” ICANN said in a written response to questions. “During this check, ICANN Compliance proactively reviews the contracted party’s compliance with obligations across the agreements and policies. Any additional contractual violation found during these checks is added to the Notice of Breach. It is not uncommon for parties who failed to comply with contractual obligations (whether they are related to DNS Abuse, RDDS, or others) to also be in arrears with ICANN fees.”
Update, 11:49 p.m. ET: Added statement from ICANN. Clarified Piscitello’s former role at ICANN.
The password manager service LastPass is now forcing some of its users to pick longer master passwords. LastPass says the changes are needed to ensure all customers are protected by their latest security improvements. But critics say the move is little more than a public relations stunt that will do nothing to help countless early adopters whose password vaults were exposed in a 2022 breach at LastPass.
LastPass sent this notification to users earlier this week.
LastPass told customers this week they would be forced to update their master password if it was less than 12 characters. LastPass officially instituted this change back in 2018, but some undisclosed number of the company’s earlier customers were never required to increase the length of their master passwords.
This is significant because in November 2022, LastPass disclosed a breach in which hackers stole password vaults containing both encrypted and plaintext data for more than 25 million users.
Since then, a steady trickle of six-figure cryptocurrency heists targeting security-conscious people throughout the tech industry has led some security experts to conclude that crooks likely have succeeded at cracking open some of the stolen LastPass vaults.
KrebsOnSecurity last month interviewed a victim who recently saw more than three million dollars worth of cryptocurrency siphoned from his account. That user signed up with LastPass nearly a decade ago, stored their cryptocurrency seed phrase there, and yet never changed his master password — which was just eight characters. Nor was he ever forced to improve his master password.
That story cited research from Adblock Plus creator Wladimir Palant, who said LastPass failed to upgrade many older, original customers to more secure encryption protections that were offered to newer customers over the years.
For example, another important default setting in LastPass is the number of “iterations,” or how many times your master password is run through the company’s encryption routines. The more iterations, the longer it takes an offline attacker to crack your master password.
Palant said that for many older LastPass users, the initial default setting for iterations was anywhere from “1” to “500.” By 2013, new LastPass customers were given 5,000 iterations by default. In February 2018, LastPass changed the default to 100,100 iterations. And very recently, it upped that again to 600,000. Still, Palant and others impacted by the 2022 breach at LastPass say their account security settings were never forcibly upgraded.
Palant called this latest action by LastPass a PR stunt.
“They sent this message to everyone, whether they have a weak master password or not – this way they can again blame the users for not respecting their policies,” Palant said. “But I just logged in with my weak password, and I am not forced to change it. Sending emails is cheap, but they once again didn’t implement any technical measures to enforce this policy change.”
Either way, Palant said, the changes won’t help people affected by the 2022 breach.
“These people need to change all their passwords, something that LastPass still won’t recommend,” Palant said. “But it will somewhat help with the breaches to come.”
LastPass CEO Karim Toubba said changing master password length (or even the master password itself) is not designed to address already stolen vaults that are offline.
“This is meant to better protect customers’ online vaults and encourage them to bring their accounts up to the 2018 LastPass standard default setting of a 12-character minimum (but could opt out from),” Toubba said in an emailed statement. “We know that some customers may have chosen convenience over security and utilized less complex master passwords despite encouragement to use our (or others) password generator to do otherwise.”
A basic functionality of LastPass is that it will pick and remember lengthy, complex passwords for each of your websites or online services. To automatically populate the appropriate credentials at any website going forward, you simply authenticate to LastPass using your master password.
LastPass has always emphasized that if you lose this master password, that’s too bad because they don’t store it and their encryption is so strong that even they can’t help you recover it.
But experts say all bets are off when cybercrooks can get their hands on the encrypted vault data itself — as opposed to having to interact with LastPass via its website. These so-called “offline” attacks allow the bad guys to conduct unlimited and unfettered “brute force” password cracking attempts against the encrypted data using powerful computers that can each try millions of password guesses per second.
A chart on Palant’s blog post offers an idea of how increasing password iterations dramatically increases the costs and time needed by the attackers to crack someone’s master password. Palant said it would take a single high-powered graphics card about a year to crack a password of average complexity with 500 iterations, and about 10 years to crack the same password run through 5,000 iterations.
Image: palant.info
However, these numbers radically come down when a determined adversary also has other large-scale computational assets at their disposal, such as a bitcoin mining operation that can coordinate the password-cracking activity across multiple powerful systems simultaneously.
Meaning, LastPass users whose vaults were never upgraded to higher iterations and whose master passwords were weak (less than 12 characters) likely have been a primary target of distributed password-cracking attacks ever since the LastPass user vaults were stolen late last year.
Asked why some LastPass users were left behind on older security minimums, Toubba said a “small percentage” of customers had corrupted items in their password vaults that prevented those accounts from properly upgrading to the new requirements and settings.
“We have been able to determine that a small percentage of customers have items in their vaults that are corrupt and when we previously utilized automated scripts designed to re-encrypt vaults when the master password or iteration count is changed, they did not complete,” Toubba said. “These errors were not originally apparent as part of these efforts and, as we have discovered them, we have been working to be able to remedy this and finish the re-encryption.”
Nicholas Weaver, a researcher at University of California, Berkeley’s International Computer Science Institute (ICSI) and lecturer at UC Davis, said LastPass made a huge mistake years ago by not force-upgrading the iteration count for existing users.
“And now this is blaming the users — ‘you should have used a longer passphrase’ — not them for having weak defaults that were never upgraded for existing users,” Weaver said. “LastPass in my book is one step above snake-oil. I used to be, ‘Pick whichever password manager you want,’ but now I am very much, ‘Pick any password manager but LastPass.'”
Asked why LastPass isn’t recommending that users change all of the passwords secured by the encrypted master password that was stolen when the company got hacked last year, Toubba said it’s because “the data demonstrates that the majority of our customers follow our recommendations (or greater), and the probability of successfully brute forcing vault encryption is greatly reduced accordingly.”
“We’ve been telling customers since December of 2022 that they should be following recommended guidelines,” Toubba continued. “And if they haven’t followed the guidelines we recommended that they change their downstream passwords.”
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