KOREONEMidnight Flag CTF 2026 – BlackBank Challenge Writeup
BlackBank is a black-box web exploitation challenge centered on predicting Node.js (V8) Math.random() output. The application is an Express.js banking platform with a companion webmail service, both protected behind session-based authentication. A second, high-value user account — Vladizlow — is protected by Two-Factor Authentication (2FA) that sends a numeric code via the internal mail system. The critical…
Midnight Flag CTF 2026 – BlackBank Challenge Writeup » kore.one
BlackBank is a black-box web exploitation challenge centered on predicting Node.js (V8) Math.random() output. The application is an Express.js banking platform with a companion webmail service, both protected behind session-based authentication. A second, high-value user account — Vladizlow — is protected by Two-Factor Authentication (2FA) that sends a numeric code via the internal mail system.