Hackers used Twilio breach to intercept Okta one-time passwords

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Hackers behind a phishing assault that compromised accounts at cloud communications supplier Twilio Inc. used their entry to intercept one-time passwords issued by Okta Inc.

The assault on Twilio passed off on August 4 and concerned the theft of worker credentials which, in flip, gave the hacker entry to a restricted variety of buyer accounts. To realize additional entry, the attacker posed as Twilio’s IT division in emails suggesting that workers’ passwords had expired or that they wanted to schedule conferences, together with a hyperlink. The hyperlink was to a pretend net web page that resembled Twilio’s official inner pages the place workers have been requested to enter their credentials.

It’s unclear what number of purchasers had their accounts uncovered. Nevertheless, it was later revealed that the hack might have uncovered the telephone numbers of 1,900 customers of the encrypted messaging app Sign. It was reported on August 25 that the identical hacking group had breached 130 organizations, together with Mailchimp and DigitalOcean Holdings Inc.

Extra particulars of the Twilio hack have come to gentle with data from 163 Twilio purchasers now confirmed to have been compromised, however in an attention-grabbing twist, 93 of these accounts additionally had incoming two-factor authentication messages from Authy hijacked. . The hackers did this by registering further gadgets to these accounts, and people gadgets additionally acquired the 2FA messages.

“Since then, we have now recognized and eliminated unauthorized gadgets from these Authy accounts,” Twilio stated in a standing replace. “Twilio bought Authy in 2015 and several other parts of the Twilio platform help Authy performance.” Affected account customers have been notified and given further steerage to guard their accounts.

Notably, in some circumstances, the attackers particularly focused Twilio and Authy customers with Okta accounts, searching for 38 Okta-related telephone numbers within the Twilio admin panel, most of them related to a corporation that makes use of Okta. .

“SaaS has turn out to be an important a part of any software stack. It is solely pure that also they are a large supply of threat within the provide chain,” Abhay Bhargav, CEO and founding father of AppSec coaching platform AppSecEngineer PTE Ltd, informed SiliconANGLE. “We noticed this with Digitalocean and Mailchimp (mail supply companies). electronic mail) and we’re seeing it with Twilio and OTP supply.”

“Attackers in the present day want to carry out ‘ecosystem’ model assaults the place they compromise targets which have huge downstream ecosystems like Twilio purchasers (the ecosystem) by Twilio,” added Bhargav. “It can be crucial that organizations embrace these SaaS instruments as a part of their risk fashions and actively take into account incident response with this in thoughts.”

Photograph: Twilio

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Hackers used Twilio breach to intercept Okta one-time passwords