Password-Spray Account Takeover Detection
A detection release for password-spray account takeover in Microsoft 365, published October 23, 2026. A new high-severity behavior rule, EntraID_SignIn_After_Block, alerts when an attacker who holds a user's password gets into the account after Conditional Access blocked their earlier attempts. It catches the Azure CLI password spraying that Huntress has reported since June 2026, when a risk policy stops the sprayer once and they come back from another address. A precision fix to EntraID_Valid_Password_Blocked ships with it.
No action is needed: the rules sync to every instance automatically.