New Robocall Bot on Telegram can Trick Targets Into Giving Up Their Password

Researchers at CyberNews have identified a new form of automated social engineering tool that can harvest one-time passwords (OTPs) from users in the United States, the United Kingdom, and Canada. 

Without any direct connection with the victim, the so-called OTP Bot may mislead victims into providing criminals credentials to their bank accounts, email, and other internet services. It’s exhausting for a probable victim to listen to someone try to scam them blind by taking advantage of their generosity. 

As a new type of bot-for-hire is conquering the field of social engineering, OTP Bot, the latest form of malicious Telegram bot that uses robocalls to trick unsuspecting victims into handing over their one-time passwords, which fraudsters then use to login and empty their bank accounts. Even worse, the newfangled bot’s userbase has exploded in recent weeks, with tens of thousands of people signing up. 

OTP Bot is the latest example of the emerging Crimeware-as-a-Service model, where cybercriminals rent out destructive tools and services to anybody ready to pay, according to CyberNews expert Martynas Vareikis. After being purchased, OTP Bot enables the users to collect one-time passwords from innocent people by simply typing the target’s phone number, as well as any extra information obtained via data leaks or the black market, into the bot’s Telegram chat window. 

“Depending on the service the threat actor wishes to exploit, this additional information could include as little as the victim’s email address,” says Vareikis. The bot is being marketed on a Telegram chat channel with over 6,000 users, allowing its owners to make a lot of money by selling monthly memberships to cybercriminals. Meanwhile, its users brag about their five-figure profits from robbing their targets’ bank accounts. 

Bot-for-hire services, according to Jason Kent, a hacker in residence at Cequence Security, have already commoditized the automated threat industry, making it very easy for criminals to enter into social engineering. 

Kent told CyberNew, “At one time, a threat actor would need to know where to find bot resources, how to cobble them together with scripts, IP addresses, and credentials. Now, a few web searches will uncover full Bot-as-a-Service offerings where I need only pay a fee to use a bot. It’s a Bots-for-anyone landscape now and for security teams.” 

Gift cards make the scam go-round: 

Card linking is the most common scamming tactic used by OTP Bot subscribers. It comprises linking a victim’s credit card to their mobile payment app account and then purchasing gift cards in real stores with it.

“Credit card linking is a favorite among scammers because stolen phone numbers and credit card information are relatively easy to come by on the black market,” reckons Vareikis. 

“With that data in hand, a threat actor can choose an available social engineering script from the chat menu and simply feed the victim’s information to OTP Bot.” 

The bot also contacts the victim’s number, acting as a support representative, and tries to mislead them into giving their one-time password, which is necessary to log in to the victim’s Apple Pay or Google Pay account, using a fake caller ID. The threat actor can then link the victim’s credit card to the payment app and go on a gift card buying spree in a nearby physical store after logging in with the stolen one-time password. 

Scammers use linked credit cards to buy prepaid gifts for one simple reason as they leave no financial footprints. This is particularly useful during a pandemic, when mask regulations are in effect in almost all interior areas, making it considerably simpler for criminals to conceal their identities throughout the process. 

Since its release on Telegram in April, the service looks to be gaining a lot of momentum, especially in the last few weeks. The OTP Bot Telegram channel currently has 6,098 members, a massive 20 percent growth in just seven days. 

The simplicity of use and the bot-for-hire model, which allow unskilled or even first-time fraudsters to easily rob their victims with the least input and zero social contact, appear to be some of the reasons for the fast rise. In fact, some OTP Bot users blatantly broadcast their success tales in the Telegram conversation, flaunting to other members of the channel about their ill-gotten gains. 

Based on the popularity of OTP Bot, it’s apparent that this new sort of automated social engineering tool will only gain more popularity. Indeed, it’ll only be a matter of time until a slew of new knockoff services hit the market, attracting even more fraudsters looking to make a fast buck off unsuspecting victims. 

The creator of Spyic, Katherine Brown, warns that as more bots enter the market, the opportunities for social engineering and abuse will grow exponentially. “This year we’ve already seen bots emerge that automate attacks against political targets to drive public opinion,” says Brown. 

The growth of social engineering bots-for-hire is even more alarming, according to Dr. Alexios Mylonas, senior cybersecurity lecturer at the University of Hertfordshire, since the pandemic has put greater limitations on our social connections. 

“This is particularly true for those who are not security-savvy. Threat actors are known to use automation and online social engineering attacks, which enables them to optimize their operations, to achieve their goals and the CyberNews team has uncovered yet another instance of it,” Mylonas stated CyberNews. 

Keeping all of this in mind, understanding how to detect a social engineering attempt is still critical for protecting money and personal information. Here’s how to do it: 

1.Calls from unknown numbers should not be answered. 

2.Never give out personal information: Names, usernames, email addresses, passwords, PINs, and any other information that may be used to identify you fall into this category. 

3. Don’t fall into the trap: Scammers frequently use a false feeling of urgency to get targets to hand up their personal information. If someone is attempting to persuade the user to make a decision, they should hang up or say they will call back them later. Then dial the toll-free number for the firm they claim to represent. 

4.Don’t trust caller ID: By mimicking names and phone numbers, scammers might impersonate a firm or someone from your contact list. 

Financial service companies, on the other hand, never call their clients to validate personal information. They will simply block the account if they detect suspicious behavior and expect the user to contact the firm through official means to fix the problem. As a result, be watchful, even if the caller ID on your phone screen appears to be legitimate.