Password Spray Attack

Password Spraying Attack | OWASP Foundation

Reverse brute-force attack

SMTP User Enumeration UtilityRapid7

SMB Login Check ScannerRapid7

Outlook Web App (OWA) Brute Force UtilityRapid7

GitHub - insidetrust/statistically-likely-usernames: Wordlists for creating statistically likely username lists for use in password attacks and security testingGitHub