The City Hall of Codo Breach Happened in December. The SHA-1 Passwords Just Went Public.

In December 2024, a database belonging to the Municipal City Hall of Codo, a Brazilian government entity in Maranhao, was breached and 411 records were exposed on underground data leak forums. Our analysts flagged this incident because the leaked dataset includes SHA-1 hashed passwords, an outdated and demonstrably weak hashing algorithm that modern tools can crack at scale. For a government platform handling citizen data, the use of SHA-1 represents a significant and avoidable security failure.

Why This Government Breach Is Dangerous

Government credentials are particularly sensitive. Citizens often use the same passwords across their government portal accounts and personal email or banking services. When SHA-1 hashed passwords are exposed, attackers can reverse them using precomputed lookup tables called rainbow tables, often within seconds. Any individual whose hash is cracked is immediately vulnerable to account takeover on any service where they reused that password.

What Was Exposed

• Email address
• Password hash (SHA-1 algorithm)

Why This Matters

SHA-1 was officially deprecated by security standards bodies years ago because it can be broken with modest computing resources. When a government database stores passwords using SHA-1, it signals that the system was built on outdated infrastructure and likely has not received meaningful security updates. For the affected individuals, the risk extends beyond this single platform. Credential stuffing attacks use cracked passwords to attempt logins across banking, email, and social media platforms. A government portal breach can therefore become the starting point for widespread account takeover and identity fraud.

How Government Database Breaches Happen

Municipal and local government systems are frequent targets because they often run on older, underfunded infrastructure. Attackers commonly exploit unpatched web application vulnerabilities, default or weak database credentials, or insecure API endpoints that expose data without authentication. Once access is gained, the attacker exports the database and distributes the records on dark web forums. Smaller municipalities like Codo face the same threat landscape as large corporations but often have a fraction of the security resources.

Check If You Are Affected

HEROIC's breach monitoring platform searches across more than 400 billion exposed records. If your email address appeared in the City Hall of Codo breach or any related government data leak, you will be alerted so you can change your passwords and protect your accounts before attackers act. Run a free scan at HEROIC.com to check your exposure now.