These "MIX" text files are primarily used by attackers for credential stuffing , where automated scripts try combinations across various websites to gain unauthorized access to accounts.
If the data originated from an infostealer, your device itself may be compromised. Run a full scan with reputable antivirus software. ALIEN TXTBASE Stealer Logs Data Breach 107K MIX.txt
Leaked credentials can be a gateway to more sensitive personal information stored within compromised accounts. These "MIX" text files are primarily used by