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Cloudflare Additionally Focused by Hackers Who Breached Twilio

By Eduard Kovacs on August 10, 2022

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The risk actor that not too long ago breached Twilio programs additionally focused Cloudflare, and some of the net safety firm’s staff fell for the phishing messages.

Twilio revealed over the weekend that it grew to become conscious of unauthorized entry to a few of its programs on August 4. An investigation confirmed that the attackers had tricked a few of its staff into offering their credentials, which they then used to entry inner programs and procure buyer information.

The risk actor despatched phishing textual content messages to Twilio staff to trick them into getting into their credentials on a malicious web site. The messages knowledgeable recipients of expired passwords and schedule modifications, and pointed to domains that included the phrases ‘Twilio’, ‘Okta’ and ‘SSO’.

The enterprise communications companies famous that the attacker, which it described as nicely organized and complicated, “appeared to have refined talents to match worker names from sources with their cellphone numbers.”

Cloudflare revealed on Tuesday that its personal staff additionally obtained comparable textual content messages, on July 20. The corporate stated greater than 100 SMS messages had been despatched to its staff and their households, pointing them to web sites hosted on domains that appeared to belong to Cloudflare.

Cloudflare makes use of Okta identification companies and the phishing web page regarded equivalent to the official Okta login web page. If customers entered their username and password, the credentials can be despatched to the attacker, who seemingly tried to make use of them instantly to log into Cloudflare programs. This might immediate them for second-factor authentication — sometimes a code obtained through SMS or from a devoted app — and the phishing web page would then additionally immediate the sufferer to enter a code, which might even be despatched to the attacker.

Nevertheless, within the case of Cloudflare, whereas three staff did enter their credentials on the phishing web site, the corporate makes use of bodily safety keys from distributors akin to YubiKey for two-factor authentication, which prevented the attacker from accessing its programs.

In keeping with Cloudflare, the phishing web page was additionally set as much as ship the AnyDesk distant entry software program, which might give the attacker management over the sufferer’s pc. The corporate stated none of its staff acquired to this step and it’s assured that its safety programs would have blocked the set up of the software program.

Each Cloudflare and Twilio have taken motion to disrupt the infrastructure utilized by the attackers, however they seemed to be persistent, altering cell carriers and internet hosting suppliers in an effort to proceed their assault.

Cloudflare screens the net for doubtlessly malicious domains, however the area used on this assault was registered solely an hour earlier than the primary phishing messages went out and the corporate had but to note them.

The assault has but to be linked to a identified risk actor, however Cloudflare has shared some indicators of compromise (IoCs), in addition to info on the infrastructure utilized by the attacker.

Associated: Cryptocurrency Providers Hit by Knowledge Breach at CRM Firm HubSpot

Associated: Microsoft, Okta Verify Knowledge Breaches Involving Compromised Accounts

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