Compromised Zendesk Employee Credentials Lead to Breach
Zendesk has alerted customers to a successful SMS phishing campaign that has exposed "service data," but details remain scarce.
Phishing uses deceptive messages to steal credentials or deliver malware, while user verification, MFA, and email filtering reduce the risk.
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Background for this topic.
Phishing is deceptive communication—by email, text, phone, or a fake website—that impersonates a trusted person or service to make someone disclose credentials, approve a transaction, reveal sensitive information, or run harmful software. Attackers use it to bypass technical controls by persuading a legitimate user to perform an action, and may target employees, customers, administrators, or suppliers.
Its impact can include account takeover, unauthorized payments, exposure of personal or business data, and access to internal systems. The most effective control for stolen-password phishing is phishing-resistant multi-factor authentication, such as hardware-backed passkeys or security keys, which binds authentication to the legitimate site. Organizations should also filter and authenticate messaging where possible, use password managers, restrict risky actions, train users to verify unusual requests through a separate channel, and provide rapid reporting so suspected credentials or sessions can be revoked.
Zendesk has alerted customers to a successful SMS phishing campaign that has exposed "service data," but details remain scarce.
KnowBe4 releases overall 2022 and Q4 2022 global phishing test reports and finds business-related emails continue to be utilized as a phishing strategy and reveal top holiday email phishing subjects.