Your TIM Brasil Data May Already Be in the Wrong Hands

HEROIC analysts identified a major database breach exposing records from TIM Brasil, one of Brazil's largest telecommunications providers. Discovered on June 12, 2024, this incident compromised exactly 15,624,785 records belonging to TIM Brasil customers. The exposed data includes phone numbers, first names, and last names — a combination that gives threat actors everything they need to launch targeted social engineering attacks, SIM swap fraud, and impersonation campaigns against millions of Brazilians.

Why This Is Dangerous

When a telecom provider's customer database is breached, the consequences reach far beyond a simple data exposure. TIM Brasil subscribers whose phone numbers, first names, and last names were leaked are now at elevated risk of vishing calls (voice phishing), SMS phishing (smishing), and SIM swapping — a technique that allows attackers to hijack a victim's phone number and bypass SMS-based two-factor authentication. With 15.6 million people affected, the scale of potential downstream harm is enormous. Criminals can also cross-reference this data with other leaked datasets to build richer profiles for identity theft and financial fraud.

What Was Exposed

• Phone Number
• First Name
• Last Name

Why This Matters

Telecom records are a foundational building block for many forms of cybercrime. A phone number paired with a real name makes a target credible and reachable. Attackers use this data for credential stuffing campaigns (calling into account recovery lines while impersonating the victim), account takeover (ATO) attacks against financial and social media platforms that use SMS verification, and identity theft schemes that require only basic personal details to open fraudulent accounts or lines of credit. The absence of passwords in this leak does not reduce the risk — it simply shifts the threat vector toward social manipulation rather than direct account compromise.

How Database Breaches Work

A database breach occurs when unauthorized parties gain access to a structured data repository — typically through exploited software vulnerabilities, misconfigured cloud storage, stolen administrative credentials, or SQL injection attacks. Once inside, attackers extract records in bulk. In large telecommunications companies, customer databases hold millions of rows of subscriber data and are high-value targets. After extraction, stolen data is commonly packaged and sold on dark web marketplaces or distributed freely in criminal forums to maximize exposure and secondary exploitation.

Check If You Are Affected

If you are or were a TIM Brasil subscriber, your data may have been exposed in this breach. HEROIC offers a free breach scanner powered by a database of over 400 billion compromised records. Enter your email address at heroic.com to instantly find out if your information has been leaked — and get guidance on what to do next.