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Cybercriminals bypass 2FA and OTP with robocalling and Telegram bots

September 29, 2021

Two-factor authentication (2FA) has been widely adopted by online services over the past several years and turning it on is probably the best thing users can do for their online account security. Faced with this additional hurdle that prevents them from exploiting stolen passwords, cybercriminals have had to adapt, too, and come up with innovative ways to extract one-time use authentication codes from users.

According to a new report from cybercrime intelligence firm Intel 471, the latest development in 2FA bypassing involves the use of robocalls with interactive messages that are meant to trick users into handing over their one-time passwords (OTPs) in real-time as attackers are trying to access their accounts. All of this is automated and controlled by using Telegram-based bots, much like teams in organizations use Slack bots to automate workflows.

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