On April 9, Twitter/X started mechanically modifying hyperlinks that point out “twitter.com” to learn “x.com” as an alternative. However over the previous 48 hours, dozens of recent domains have been registered that display how this variation could possibly be used to craft convincing phishing hyperlinks — resembling fedetwitter[.]com, which till very just lately rendered as fedex.com in tweets.

The message displayed when one visits goodrtwitter.com, which Twitter/X displayed as goodrx.com in tweets and messages.
A search at DomainTools.com reveals not less than 60 domains have been registered over the previous two days for domains ending in “twitter.com,” though analysis to this point reveals the vast majority of these domains have been registered “defensively” by personal people to forestall the domains from being bought by scammers.
These embody carfatwitter.com, which Twitter/X truncated to carfax.com when the area appeared in person messages or tweets. Visiting this area presently shows a message that begins, “Are you critical, X Corp?”
Replace: It seems Twitter/X has corrected its mistake, and now not truncates any area ending in “twitter.com” to “x.com.”
Unique story:
The identical message is on different newly registered domains, together with goodrtwitter.com (goodrx.com), neobutwitter.com (neobux.com), roblotwitter.com (roblox.com), square-enitwitter.com (square-enix.com) and yandetwitter.com (yandex.com). The message left on these domains signifies they had been defensively registered by a user on Mastodon whose bio says they’re a programs admin/engineer. That profile has not responded to requests for remark.
A variety of these new domains together with “twitter.com” seem like registered defensively by Twitter/X customers in Japan. The area netflitwitter.com (netflix.com, to Twitter/X customers) now shows a message saying it was “acquired to forestall its use for malicious functions,” together with a Twitter/X username.
The area talked about in the beginning of this story — fedetwitter.com — redirects customers to the weblog of a Japanese expertise fanatic. A person with the deal with “amplest0e” seems to have registered space-twitter.com, which Twitter/X customers would see because the CEO’s “space-x.com.” The area “ametwitter.com” already redirects to the actual americanexpress.com.
A few of the domains registered just lately and ending in “twitter.com” presently don’t resolve and include no helpful contact info of their registration data. These embody firefotwitter[.]com (firefox.com), ngintwitter[.]com (nginx.com), and webetwitter[.]com (webex.com).

The area setwitter.com, which Twitter/X till very just lately rendered as “intercourse.com,” redirects to this weblog submit warning concerning the current modifications and their potential use for phishing.
Sean McNee, vice chairman of analysis and information at DomainTools, informed KrebsOnSecurity it seems Twitter/X didn’t correctly restrict its redirection efforts.
“Dangerous actors may register domains as a approach to divert site visitors from reliable websites or manufacturers given the chance — many such manufacturers within the high million domains finish in x, resembling webex, hbomax, xerox, xbox, and extra,” McNee stated. “Additionally it is notable that a number of different globally fashionable manufacturers, resembling Rolex and Linux, had been additionally on the record of registered domains.”
The obvious oversight by Twitter/X was trigger for amusement and amazement from many former customers who’ve migrated to different social media platforms for the reason that new CEO took over. Matthew Garrett, a lecturer at U.C. Berkeley’s Faculty of Info, summed up the Schadenfreude thusly:
“Twitter simply doing a ‘redirect hyperlinks in tweets that go to x.com to twitter.com as an alternative however unintentionally achieve this for all domains that finish x.com like eg spacex.com going to spacetwitter.com’ is just not completely the funniest factor I may think about but it surely’s excessive up there.”