In the first quarter of 2025, Rapid7’s Managed Threat Hunting team observed a significant volume of brute-force password attempts leveraging FastHTTP, a high-performance HTTP server and client library for Go, to automate unauthorized logins via HTTP requests.
This rapid volume of credential spraying was primarily designed to discover and compromise accounts not properly secured by multi-factor authentication (MFA). Out of just over a million unauthorized login attempts the researchers observed, the distribution of originating traffic sources is similar to that previously seen in January 2025. Some of the most prominent nations serving as points of origin for these attempts are as follows – Brazil: 70%, Venezuela: 3%, Turkey: 3%.
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Source: Rapid7
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