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Iran targeting Microsoft 365 with password spraying

April 3, 2026Nicolas Krassas, Check Point Research, Cyber_OSINT

Nicolas Krassas and Check Point Research describe Iranian activity focused on Microsoft 365 password-spraying. Check Point Research says TOR was used to scan and spray and Israeli VPN infrastructure was used for successful logins.

Iran targets M365 accounts with password-spraying attacks
Iranian APT conducts a wide M365 password spray campaign - focus on Israeli and UAE orgs
TOR used to scan and spray, Israeli VPN infrastructure used for successful logins
Check Point Research reported an Iran-linked threat actor conducting a three-wave password-spraying campaign targeting Microsoft 365 in the Middle East, mainly Israel and the UAE, impacting over 300 Israeli and 25 UAE organizations
Nicolas Krassas
Check Point Research
Cyber_OSINT
IranM365identitymicrosoftauth

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