The Robin Banks phishing-as-a-service platform now has a feature to bypass multi-factor authentication by stealing login session cookies, according to researchers at IronNet. The phishing kit’s developer used an open-source tool to implement this feature, which targets Google, Yahoo, and Outlook accounts.

“Like many other open-source tools, Evilginx2 has become very popular among cybercriminals as it offers an easy way to launch adversary-in-the-middle (AiTM) attacks with a pre-built framework for phishing login credentials and authentication tokens (cookies),” the researchers write. “This, as a result, allows the attacker to bypass 2FA. Evilginx2 works by creating a reverse proxy. Once a user is lured to the phishing site, they are presented with a phishing page (via phishlets) with localized SSL certificates. The user is proxied internally, and once a successful login occurs to the destination (i.e. Gmail), the username, password, and login token are captured. The attacker can then view these stolen credentials through the Robin Banks GUI, their Telegram bot, or the evilginx2 server terminal. From there, the attacker can open their own browser, insert the stolen login token, enter the credentials to successfully bypass 2FA, and access the desired account.”

IronNet notes that phishing kits are increasingly including ways to get around multi-factor authentication.

“Robin Banks’ introduction of this new cookie-stealing feature is somewhat to be expected given the growing need for threat actors to bypass MFA for initial access,” the researchers write. “With more and more organizations (hopefully) requiring 2FA and multi-factor authentication (MFA) to inhibit easy unauthorized access to user accounts, credential-stealing alone only goes so far. This is why we have seen a growing trend amongst threat actors devising ways to bypass MFA, such as through MFA fatigue or cookie-stealing.”