What is a SIM Swap Attack? How to Protect Against SIM Swap Attacks

Haseeb Awan
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April 17, 2023
Modified On
August 29, 2023


The advancement of technology has made mobile phones an essential aspect of our daily lives. We rely on them for various purposes, from online shopping to socializing with friends. However, the widespread use of mobile phones has also led to increased SIM swap attacks. These scams involve perpetrators replacing a victim's SIM card to take control of their mobile number. This blog will explore what a SIM swap attack is and ways to protect yourself from SIM Swap Attacks.

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What is a SIM Swap Attack?

In a SIM swap attack, the attacker transfers the victim's mobile number to a new SIM card to obtain access. The attacker can reset passwords, gain access to bank accounts, and steal sensitive data once they control the mobile number. SIM swap attacks have increased frequency in recent years, with victims suffering severe consequences and losing their savings.

How Does a SIM Swap Attack Happen?

In a SIM swap attack, the victim's mobile phone number is transferred to a new SIM card under the attacker's control after the attacker fraudulently obtains access to it. The attacker can block incoming calls and texts to the victim's phone number using the victim's new SIM card. This gives the attacker access to the victim's two-factor (2FA) protected online accounts. The attacker can occasionally obtain the victim's personal information, such as name, address, date of birth, and social security number (SSN), through phishing scams or by purchasing the information from the dark web. After obtaining this data, the attacker can then claim that the victim's phone was lost or stolen by contacting the victim's mobile service provider. They can ask for the porting of their number to a new SIM card. If successful, calls and messages will now be routed to the attacker's phone, and the victim's phone will no longer be able to receive them.

This situation grants the attacker access to the victim's online accounts, including bank accounts and social media profiles, circumventing two-factor authentication safeguards. The frequency of SIM swap attacks has grown significantly in recent years, highlighting the importance of taking preventative measures against them.

What Does Stats Say about SIM Swapping? Let’s See

The Federal Trade Commission (FTC) report in 2021 revealed that identity theft accounted for 33% of all fraud reports, making it the second most reported category. Among the identity theft incidents, mobile phone account takeovers, which include SIM swap attacks, saw a rise of 78% from 2019 to 2020. The report also disclosed that individuals aged between 20-29 reported the most incidents of mobile phone account takeovers, with a 47% increase in reports from this age group. The median loss for victims of mobile phone account takeovers was $300, but the losses could be higher if the fraudster gains access to the victim's accounts.

Additionally, Javelin Strategy & Research reported that account takeover fraud in the US cost $2.3 billion in 2020, with mobile phone account takeovers accounting for $1.9 billion. The report noted that SIM swap attacks were becoming more prevalent, and fraudsters used social engineering techniques to deceive victims into sharing personal information.

While precise figures on SIM swap attacks in the US may be difficult to obtain, the reports suggest that mobile phone account takeovers, including SIM swap attacks, are a growing issue in the US and can result in significant financial losses for victims.

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Sim Swapping Impact on Businesses

SIM swapping is not just a threat to individuals; it can also seriously affect businesses. Here are some of how SIM swapping can affect businesses:

Loss of Sensitive Information:

If a hacker executes a SIM swap attack on a business's phone number, they could potentially infiltrate sensitive information. This may include customer data, financial records, and other confidential data that could be utilized for malicious purposes or sold on the dark web. Such an event can result in severe financial losses and tarnish the company's reputation.

Disruption of Business Operations:

When hackers acquire access to a business's phone number via SIM swapping, they could exploit that access to interfere with the company's operations. For instance, they may use the phone number to execute fraudulent transactions or divert critical calls and messages to their devices. Such actions could have severe consequences, such as business operations disruptions, lost productivity, and decreased revenue.

Damage to Brand Reputation:

If a business is the victim of a SIM swap attack, it can damage its brand reputation. Customers may need more trust in the business's ability to secure their personal information and accounts and may choose to take their business elsewhere. This can lead to a loss of revenue and market share and damage to the company's reputation that may take years to repair.

Legal and Regulatory Consequences:

In the event of a SIM swap attack against a business, the organization may face legal and regulatory repercussions. For instance, if customer information is compromised, the business may be liable for penalties and legal action under data protection regulations. Moreover, if the business operates in a regulated sector such as finance or healthcare, it may face further regulatory examination and sanctions.

Steps To Take To Protect Against SIM Swap Attacks In Organizations

To protect against SIM swap attacks, businesses can take several steps, including:

Educating Employees:

Businesses should educate their employees about the risks of SIM swapping and how to avoid falling victim to these attacks. This could include training on recognizing phishing attempts, creating strong passwords, and avoiding sharing sensitive information over the phone or via email.

Implementing Strong Security Measures:

Businesses should implement strong security measures to protect against SIM swap attacks. This could include using two-factor authentication for all accounts, implementing strict password policies, and regularly monitoring accounts for unusual activity.

Partnering with a Mobile Carrier that Offers SIM Swap Protection:

Businesses can also partner with a mobile carrier like Efani that offers SIM swap protection as part of their service. This security measure can provide them with extra protection against SIM swap attacks. The carrier can detect and prevent unauthorized attempts to swap the SIM card.

By taking these precautions, businesses can help protect themselves from SIM swap attacks and mitigate the potential damage they may cause.

How to Recognize SIM Swapping?

Some warning signs might assist in detecting SIM swapping as your problem. The sudden loss of signal or service on your phone is one of the most apparent symptoms. This occurs when the attacker seizes control of your phone number and transfers it to a new SIM card. Another sign is the inability to receive calls or texts because the attacker has forwarded your phone number to their device. You may also notice unusual activities in your account, such as unauthorized transactions or alterations to your account details, unexpected password reset requests, and SIM card error messages. If you notice any of these signs, you may have been targeted by SIM swap fraud.

What to Do If You Suspect a SIM Swap Attack?

You can take steps to secure your phone number and stop the further unauthorized activity if you believe you are the target of a SIM swap attack. The first thing to do is to get in touch with your mobile service provider as soon as possible. They can help you protect your phone number and implement additional safeguards to prevent unauthorized access. Then, use secure, one-time passwords to update your online accounts' two-factor authentication SMS-based passwords. Select two-factor authentication using an authenticator app or a security key. Additionally, monitor your bank accounts and credit reports regularly to look for any suspicious activity.

To avoid further harm to your finances and personal information, it is compulsory to act immediately if you are a victim of SIM swap fraud and take immediate action to prevent further damage to your finances and personal information. The first step is to contact your mobile service provider to report the fraudulent activity and requests that they disable the fraudulent SIM card. You should also change the passwords for all your online accounts protected by SMS-based two-factor authentication, notify your financial institution, contact the credit bureaus, file a police report, and monitor your accounts regularly. Consider signing up for a service that monitors your credit report and notifies you of any suspicious activity if you want to protect yourself from identity theft.

You can take the following actions to safeguard yourself from SIM swap attacks:

  • Instantly reach out to your mobile service provider immediately if you suspect you're a victim of a SIM swap attack for help safeguarding your phone number and preventing further unauthorized activity.
  • Change the passwords for all your online accounts that use SMS-based two-factor authentication, and consider using strong, unique passwords and an authenticator app or security key.
  • Keep a close eye on your credit reports and bank accounts for any suspicious activity, and immediately alert your financial institution if you see anything. 
  • To encrypt your internet traffic and guard against unauthorized access, consider using a virtual private network (VPN) when accessing your online accounts. 
  • Limit the amount of personal information you share online, be wary of unsolicited emails and messages, and refrain from clicking links or attachments from unidentified sources to lower your risk of identity theft. 
  • Enable two-factor authentication for your account to add a layer of security that requires a second form of identification, even if the attacker has your phone number. 
  • Do not share your personal yet basic information, such as your phone number, address, and birthday with anyone. Share this information only when necessary, and do not download unknown attachments or click on shady links, as they can be a phishing scams, You never know! 
  • Make your social media profiles less visible. Limiting the public view of your social media profiles is essential because hackers could use them to steal your data. You must ensure that only people with permission can access your private information, such as your home address, phone number, or date of birth. Making your account private, which allows only close friends and family to see the posts you share on your profile, is one way to accomplish this. 
  • It's also crucial to regularly check your credit card statements, bank statements, and other financial transactions to monitor your bank account. This will aid you in spotting any fraudulent activity, and if you encounter any dubious transactions, notify your bank immediately.
  • Call Your Mobile Service Provider and Inform them of the suspicious activity and request they suspend your account temporarily. Once your account is suspended, you can visit the service provider's store and request a new SIM card.
  • Utilizing a virtual private network (VPN) can help encrypt your internet traffic, making it harder for hackers to access your data. By shielding your confidential information, a VPN is a valuable tool in preventing a SIM swap attack.

How Efani Can Protect You from SIM Swap Fraud

A SIM swap protection service offered by Efani can aid in protecting against SIM swap attacks. You will receive a SIM card after signing up for the service linked to your phone number and account, making it challenging for attackers to switch out your SIM card. Additionally, Efani offers two-factor authentication to secure your account further. Enabling this feature will require you to enter a unique code sent to your phone number or email address every time you log in. Even with these security measures in place, it is essential to stay vigilant and cautious. If you receive any unsolicited calls or messages claiming to be from Efani, ask for the caller's name and employee ID number before hanging up and contacting Efani's customer service to verify their identity. Never divulge any personal or account information over the phone, in response to spammy or unknown sender's messages, or in any other way. You should regularly check your accounts for unusual activity to ensure security. Check your credit reports, bank statements, and credit card statements frequently to see if there are any unauthorized accounts or inquiries. If you notice any unusual activity, take immediate action to secure your accounts by reporting it to your bank or credit bureau. It's crucial to create and remember strong, unique passwords in order to protect your Efani account and other accounts linked to your phone number. All of your online accounts are affected by this. Avoid using information that can be easily guessed, such as your name or birthdate. Use a combination of capital and lowercase letters, numbers, and symbols instead. 

Sim swap attacks, in which attackers replace a victim's SIM card to take control of their mobile number, have increased due to the prevalence of mobile phones. After that, they will have access to their online accounts, including their bank accounts, as well as their data. Reports indicate that these attacks are happening more frequently in the United States and have significantly increased over the past few years.

SIM switching can also harm businesses, including data loss, disruption of operations, harm to the brand's reputation, and legal and regulatory repercussions. By educating staff members, putting in place strict security measures, and working with a reputable mobile service provider like Efani, SIM swap attacks can be avoided.

Haseeb Awan
CEO, Efani Secure Mobile

I founded Efani after being Sim Swapped 4 times. I am an experienced CEO with a demonstrated history of working in the crypto and cybersecurity industry. I provide Secure Mobile Service for influential people to protect them against SIM Swaps, eavesdropping, location tracking, and other mobile security threats. I've been covered in New York Times, The Wall Street Journal, Mashable, Hulu, Nasdaq, Netflix, Techcrunch, Coindesk, etc. Contact me at 855-55-EFANI or haseebawan@efani.com for a confidential assessment to see if we're the right fit!

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