0ktapus: Twilio, Cloudflare phishers focused 130+ organizations

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Group-IB found that just lately revealed phishing assaults in opposition to Twilio and Cloudflare workers have been a part of a large phishing marketing campaign that resulted within the compromise of 9,931 accounts from greater than 130 organizations.

The researchers named the marketing campaign 0ktapus due to the impersonation of a well-liked id and entry administration service. The overwhelming majority of victims are situated in the US and use Okta’s id and entry administration providers. Group-IB’s risk intelligence crew found and analyzed the attackers’ phishing infrastructure, together with phishing domains, the phishing package, and the Telegram channel managed by risk actors to drop compromised data.

All sufferer organizations have been notified and supplied with the record of compromised accounts. Findings concerning the alleged id of the risk actor have been shared with worldwide regulation enforcement companies.

the nice query

On July 26, 2022, the Group-IB crew acquired a request from their Risk Intelligence consumer requesting further details about a current phishing try concentrating on their workers. The investigation revealed that these phishing assaults, in addition to the incidents at Twilio and Cloudflare, have been hyperlinks in a series: a single, easy however extremely efficient phishing marketing campaign unprecedented in scale and scope that has been lively since at the least March 2022. Because the Sign revelations confirmed, as soon as attackers compromised a corporation, they might rapidly pivot and launch subsequent provide chain assaults.

“Whereas the risk actor could have been fortunate of their assaults, it’s more likely that they rigorously deliberate their phishing marketing campaign to launch subtle provide chain assaults. It isn’t but clear if the assaults have been deliberate from begin to end or if opportunistic actions have been taken at every stage. Regardless, the 0ktapus marketing campaign has been extremely profitable, and its full scale will not be identified for a while,” mentioned Roberto Martinez, Senior Risk Intelligence Analyst at Group-IB Europe.

The first purpose of the risk actors was to acquire the Okta id credentials and two-factor authentication (2FA) codes of customers from the focused organizations. These customers acquired textual content messages containing hyperlinks to phishing websites that mimicked their group’s Okta authentication web page.

It’s nonetheless unknown how the scammers ready their goal record and the way they obtained the cellphone numbers. Nevertheless, primarily based on compromised information analyzed by Group-IB, risk actors started their assaults by concentrating on cellular operators and telecommunications corporations and will have collected the numbers from these preliminary assaults.

the massive rating

The researchers found 169 distinctive phishing domains concerned within the 0ktapus marketing campaign. The domains used key phrases akin to “SSO”, “VPN”, “OKTA”, “MFA” and “HELP”. From the sufferer’s perspective, the phishing website appears to be like convincing as it is vitally much like the official authentication web page they’re used to seeing.

Analyzing the phishing websites, the specialists found that they have been created utilizing the identical phishing package that that they had not seen prior to now. Nearer examination of the phishing package code confirmed the strains devoted to the Telegram bot configuration and the channel utilized by the attackers to drop the compromised information.

Researchers have been in a position to analyze compromised logs obtained by risk actors since March 2022. The crew discovered that the risk actor managed to steal 9,931 person credentials, together with 3,129 logs with emails and 5,441 logs with MFA codes. As a result of two-thirds of the info didn’t include a company e-mail, however solely usernames and 2FA codes, Group-IB researchers have been solely in a position to determine the area of residence of the victims.

Of the 136 sufferer organizations recognized, 114 corporations are within the US That record additionally consists of corporations which are primarily based in different international locations however have workers within the US that have been focused. Many of the corporations on the sufferer record present IT, software program improvement, and cloud providers.

In response to current information about hijacked Sign accounts, cybercriminals could also be making an attempt to achieve entry to non-public conversations and information. Such data could also be resold to the sufferer’s rivals or might merely be used to bail out a sufferer.

the topic x

Telegram’s features permit to acquire details about the channel utilized by the phishing package to gather compromised information, akin to its title and the customers that handle it.

Investigators have been in a position to recuperate some particulars concerning the second administrator of the Telegram channel in query, who goes by the nickname “X”. They have been in a position to determine one of many posts “X” made in 2019 that led them to his Twitter account. The identical device additionally revealed the primary and final title utilized by the channel supervisor, earlier than adopting the title “X”. Googling Twitter’s deal with returns a GitHub account containing the identical username and profile image. This account additionally means that Topic X’s location is the US.

“The strategies utilized by this risk actor aren’t particular, however the planning and the way it went from one firm to a different makes the marketing campaign value trying into. 0ktapus reveals how susceptible fashionable organizations are to some fundamental social engineering assaults and the way far-reaching the results of such incidents will be for his or her companions and prospects. By making our findings public, we hope that extra corporations can take preventive measures to guard their digital belongings,” mentioned Rustam Mirkasymov, Director of Cyber ​​Risk Analysis at Group-IB Europe.

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0ktapus: Twilio, Cloudflare phishers targeted 130+ organizations