What is SIM Swapping?

This article will provide a detailed look into SIM swapping, explain how it works, and explore real-world examples of these attacks. We will also discuss best practices for safeguarding your digital assets and identity.

What is SIM Swapping?

SIM swapping, SIM jacking, or SIM porting is a cyber-attack where criminals gain unauthorized access to a target’s mobile phone number by tricking the mobile service provider into transferring the victim’s phone number to a SIM card controlled by the attacker. Sim swapping can also be accomplished by logging in to the victim’s mobile service provider account, changing the address, and re-issuing a new or twin sim card.

SIM swapping is often achieved through social engineering tactics, where criminals pose as victims and manipulate customer service representatives into performing the swap.

Once the attacker has control over the victim’s phone number, they can intercept incoming text messages and phone calls, bypass two-factor authentication (2FA), reset passwords, and gain unauthorized access to the victim’s online accounts, including email, social media, and financial services.


Real-World Examples of SIM Swapping Attacks:

Twitter CEO Jack Dorsey’s Account Hijacking (2019):

In August 2019, the Twitter account of Jack Dorsey, the CEO of Twitter, was hijacked via a SIM swapping attack. The hackers, known as the “Chuckling Squad,” posted several offensive and inappropriate tweets from Dorsey’s account. The incident demonstrated the vulnerability of high-profile individuals to SIM swapping attacks and raised awareness about the need for better security measures.

Michael Terpin’s $24 Million Loss (2018):

In January 2018, Michael Terpin, a cryptocurrency investor and entrepreneur, fell victim to a SIM swapping attack. The attackers managed to steal approximately $24 million worth of cryptocurrency from Terpin’s account. Terpin later filed a lawsuit against AT&T, his mobile service provider, accusing the company of negligence and seeking $224 million in damages.

The Case of Joel Ortiz (2018)

Joel Ortiz, a 20-year-old college student from Boston, was arrested in 2018 for his involvement in multiple SIM swapping attacks targeting cryptocurrency investors. Ortiz and his accomplices stole over $5 million in cryptocurrency from at least 40 victims. The case highlighted the growing problem of SIM swapping and its potential to cause significant financial loss.

Riley Reid’s Twitter Account (2023)

Renowned adult entertainment performer Riley Reid’s phone and Twitter account were compromised on April 4th, 2023. Her Twitter account, boasting 2.3 million followers, disseminated offensive messages, including racist, antisemitic, anti-sex work, and transphobic content.

The attacker exploited Reid’s visibility to promote a dangerous anti-sex work movement. Reid informed adult industry news outlet Xbiz that an unauthorized individual had gained access to her phone provider’s account, transferring her phone number to their service provider. Consequently, the attacker intercepted her calls, texts, and two-factor authentication codes.


Protecting Yourself from SIM Swapping Attacks:

Use Alternative 2FA Methods

Relying on SMS-based 2FA can leave you vulnerable to SIM swapping attacks. Instead, opt for app-based authentication like Google Authenticator, Authy, or hardware tokens like YubiKey. These methods do not rely on your phone number and are less susceptible to SIM swapping.

Limit Personal Information Sharing

Be cautious about sharing personal information, such as your phone number, on social media and other online platforms. Cybercriminals often use this information to impersonate their victims and convince customer service representatives to perform a SIM swap.

Be Vigilant About Phishing Attempts

Cybercriminals may use phishing emails or text messages to trick you into providing sensitive information, such as account credentials or personal details. Be cautious when clicking on links in unexpected emails or texts, and verify the sender’s identity before providing any information.

Keep Your Mobile Service Provider Informed

Inform your mobile service provider about your concerns regarding SIM swapping. Some providers offer additional security features, such as a unique PIN or passphrase, to authorize changes to your account. Remember to enable Two-Factor Authentication on your mobile service provider account.

Regularly Monitor Your Accounts

Review your bank, email, and social media accounts for suspicious activity. Early detection of unauthorized access can help limit the damage and aid recovery.

Set Up Account Activity Notifications

Enable account activity notifications for your financial and online accounts. These notifications will alert you to any suspicious activity or login attempts, allowing you to take immediate action in case of unauthorized access.

Strengthen Your Passwords

Use strong, unique passwords for each account and change them regularly. A strong password consists of a combination of upper and lowercase letters, numbers, and special characters. Consider using a reputable password manager to help securely generate and store complex passwords.

Keep Software Updated

Ensure your devices and applications have the latest security patches and updates. Cybercriminals often exploit known vulnerabilities in outdated software to access your accounts and personal information.

As cyber threats evolve, staying informed about the latest attack methods and taking proactive measures to protect yourself is essential. SIM swapping is a growing concern, and awareness of this threat is the first step in safeguarding your digital assets and identity. Implementing the security practices outlined above can significantly reduce the risk of falling victim to SIM swapping and other cyberattacks. Stay vigilant, informed, and proactive in your approach to cybersecurity.

Featured image by Midjourney and Jonas Borchgrevink.