From gbhackers.com
attackers targeting legacy protocols with stolen credential dumps to increase the speed and efficiency of the brute force attacks.
Based on Proofpoint study, IMAP is the most abused protocol, IMAP is the protocol that bypasses MFA and lock-out options for failed logins.
These intelligent new brute force attacks bring a new approach to the traditional normal brute force attack that uses the combination of usernames and passwords.
Based on the Proofpoint analysis of over one hundred thousand unauthorized logins across millions of monitored cloud user-accounts and found that: