The ShinyHunters extortion gang claims it’s behind a wave of ongoing voice phishing assaults concentrating on single sign-on (SSO) accounts at Okta, Microsoft, and Google, enabling menace actors to breach company SaaS platforms and steal firm knowledge for extortion.
In these assaults, menace actors impersonate IT assist and name staff, tricking them into coming into their credentials and multi-factor authentication (MFA) codes on phishing websites that impersonate firm login portals.
As soon as compromised, the attackers acquire entry to the sufferer’s SSO account, which might present entry to different related enterprise functions and companies.
SSO companies from Okta, Microsoft Entra, and Google allow firms to hyperlink third-party functions right into a single authentication move, giving staff entry to cloud companies, inner instruments, and enterprise platforms with a single login.Â
These SSO dashboards usually checklist all related companies, making a compromised account a gateway into company techniques and knowledge.
Platforms generally related by way of SSO embrace Salesforce, Microsoft 365, Google Workspace, Dropbox, Adobe, SAP, Slack, Zendesk, Atlassian, and lots of others.
Supply: Microsoft
Vishing assaults used for knowledge theft
As first reported by BleepingComputer, menace actors have been finishing up these assaults by calling staff and posing as IT workers, utilizing social engineering to persuade them to log into phishing pages and full MFA challenges in actual time.
After having access to a sufferer’s SSO account, the attackers browse the checklist of related functions and start harvesting knowledge from the platforms obtainable to that person.
BleepingComputer is conscious of a number of firms focused in these assaults which have since acquired extortion calls for signed by ShinyHunters, indicating that the group was behind the intrusions.
BleepingComputer contacted Okta earlier this week in regards to the breaches, however the firm declined to touch upon the information theft assaults.
Nonetheless, Okta launched a report yesterday describing the phishing kits utilized in these voice-based assaults, which match what BleepingComputer has been advised.
In keeping with Okta, the phishing kits embrace a web-based management panel that permits attackers to dynamically change what a sufferer sees on a phishing website whereas chatting with them on the telephone. This permits menace actors to information victims by way of every step of the login and MFA authentication course of.
If the attackers enter stolen credentials into the true service and are prompted for MFA, they will show new dialog packing containers on the phishing website in actual time to instruct a sufferer to approve a push notification, enter a TOTP code, or carry out different authentication steps.
Supply: Okta
ShinyHunters declare accountability
Whereas ShinyHunters declined to touch upon the assaults final night time, the group confirmed to BleepingComputer this morning that it’s liable for a number of the social engineering assaults.
“We affirm we’re behind the assaults,” ShinyHunters advised BleepingComputer. “We’re unable to share additional particulars right now, in addition to the truth that Salesforce stays our main curiosity and goal, the remaining are benefactors.”
The group additionally confirmed different points of BleepingComputer’s reporting, together with particulars in regards to the phishing infrastructure and domains used within the marketing campaign. Nonetheless, it disputed {that a} screenshot of a phishing package command-and-control server shared by Okta was for its platform, claiming as a substitute that theirs was constructed in-house.
ShinyHunters claimed it’s concentrating on not solely Okta but in addition Microsoft Entra and Google SSO platforms.
Microsoft stated it has nothing to share right now, and Google stated it had no proof its merchandise had been being abused within the marketing campaign.
“At the moment, now we have no indication that Google itself or its merchandise are affected by this marketing campaign,” a Google spokesperson advised BleepingComputer.
ShinyHunters claims to be utilizing knowledge stolen in earlier breaches, such because the widespread Salesforce knowledge theft assaults, to establish and phone staff. This knowledge consists of telephone numbers, job titles, names, and different particulars used to make the social-engineering calls extra convincing.
Final night time, the group relaunched its Tor knowledge leak website, which at the moment lists breaches at SoundCloud, Betterment, and Crunchbase.
SoundCloud beforehand disclosed a knowledge breach in December 2025, whereas Betterment confirmed this month that its e-mail platform had been abused to ship cryptocurrency scams and that knowledge was stolen.
Crunchbase, which had not beforehand disclosed a breach, confirmed at present that knowledge was stolen from its company community.
“Crunchbase detected a cybersecurity incident the place a menace actor exfiltrated sure paperwork from our company community,” an organization spokesperson advised BleepingComputer. “No enterprise operations have been disrupted by this incident. We’ve contained the incident and our techniques are safe.”
“Upon detecting the incident we engaged cybersecurity specialists and contacted federal legislation enforcement. We’re reviewing the impacted data to find out if any notifications are required in keeping with relevant authorized necessities.”
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