Microsoft: Exchange Online mistakenly tags emails as malware
Microsoft is investigating an Exchange Online false positive issue causing emails containing images to be wrongly tagged as malicious and sent to quarantine. “Users’ email messages containing images may be incorrectly flagged as malware and quarantined,” Microsoft said in a service alert posted on the Microsoft 365 admin center two hours ago. “We’re reviewing service monitoring telemetry […]
Proofpoint settings exploited to send millions of phishing emails daily
A massive phishing campaign dubbed “EchoSpoofing” exploited now-fixed, weak permissions in Proofpoint’s email protection service to dispatch millions of spoofed emails impersonating big entities like Disney, Nike, IBM, and Coca-Cola, to target Fortune 100 companies. The campaign started in January 2024, disseminating an average of 3 million spoofed emails daily and reaching a peak of 14 […]
New phishing tactic hijacks email protections to mask links
Email security company Barracuda exposed a recent phishing campaign that uses legitimate URL protection services to mask malicious email links. The new phishing tactic was revealed in a Barracuda blog post Monday, and has been leveraged in attacks beginning around mid-May 2024. The attacks take advantage of the legitimacy of URL protection services used by […]