T-Mobile and Verizon employees are being texted by criminals who are attempting to entice them into swapping SIM cards with cash. In their screenshots, the targeted employees are offering $300 as an incentive for those willing to assist the senders in their criminal endeavours, and they have shared them with us. 

The report indicates that this was part of a campaign that targets current and former mobile carrier workers who could be able to access the systems that would be necessary for the swapping of SIM cards. The message was also received by Reddit users claiming to be Verizon employees, which indicates that the scam isn't limited to T-Mobile US alone. 

It is known that SIM swapping is essentially a social engineering scam in which the perpetrator convinces the carrier that their number will be transferred to a SIM card that they own, which is then used to transfer the number to a new SIM card owned by the perpetrator. 

The scammer can use this information to gain access to a victim's cell phone number, allowing them to receive multi-factor authentication text messages to break into other accounts. If the scammer has complete access to the private information of the victim, then it is extremely lucrative. 

SIM swapping is a method cybercriminals utilize to breach multi-factor authentication (MFA) protected accounts. It is also known as simjacking. Wireless carriers will be able to send messages intended for a victim if they port the victim’s SIM card information from their legitimate SIM card to one controlled by a threat actor, which allows the threat actor to take control of their account if a message is sent to the victim. 

Cyber gangs are often able to trick carrier support staff into performing swaps by presenting fake information to them, but it can be far more efficient if they hire an insider to take care of it. In the past, both T-Mobile and Verizon have been impacted by breaches of employee information, including T-Mobile in 2020 and Verizon last year, despite it being unclear how the hackers obtained the mobile numbers of the workers who received the texts. 

The company stated at the time that there was no evidence that some of the information had been misused or shared outside the organization as a result of unauthorized access to the file, as well as in 2010 a Verizon employee had accessed a file containing details for about half of Verizon s 117,00-strong workforce without the employee's authorization.

It appears that the hackers behind the SIM swap campaign were working with outdated information, as opposed to recent data stolen from T-Mobile, according to the number of former T-Mobile employees who commented on Reddit that they received the SIM swap message. As the company confirmed the fact that there had not been any system breaches at T-Mobile in a statement, this was reinforced by the company. 

Using SIM swap attacks, criminals attempt to reroute a victim's wireless service to a device controlled by the fraudster by tricking their wireless carrier into rerouting their service to it. A successful attack can result in unauthorized access to personal information, identity theft, financial losses, emotional distress for the victim, and financial loss. Criminals started hijacking victims' phone numbers in February 2022 to steal millions of dollars by performing SIM swap attacks. 

The FBI warned about this in February 2022. Additionally, the IC3 reported that Americans reported 1,075 SIM-swapping complaints during the year 2023, with an adjusted loss of $48,798,103 for each SIM-swapping complaint. In addition to 2,026 complaints about SIM-swapping attacks in the past year, the FBI also received $72,652,571 worth of complaints about SIM-swapping attacks from January 2018 to December 2020. 

Between January 2018 and December 2020, however, only 320 complaints were filed regarding SIM-swapping incidents resulting in losses of around $12 million. Following this huge wave of consumer complaints, the Federal Communications Commission (FCC) announced new regulations that will protect Americans from SIM-swapping attacks to protect Americans from this sort of attack in the future.

It is required by the new regulations that carriers have a secure authentication procedure in place before they transfer the customer's phone numbers to a different device or service provider. Additionally, they need to warn them if their accounts are changed or they receive a SIM port out request.