Stay secure with the latest email security updates, best practices, and threat alerts to protect your inbox and sensitive information.
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Background for this topic.
Email is a system for exchanging digital messages, typically using mail servers and clients over a network. In security, it includes both the messages and the accounts, servers, domains, and authentication mechanisms that handle them. Email commonly carries phishing links, malicious attachments, and fraudulent requests for payments or credentials; compromised accounts can also be used to impersonate trusted people and conduct further attacks.
Defenses include filtering and malware scanning, phishing-resistant multifactor authentication, careful handling of links and attachments, and monitoring for unusual login or sending activity. Domain controls such as SPF, DKIM, and DMARC help receiving systems detect messages that are forged or sent without authorization, while encryption protects message contents in transit or at rest when correctly implemented. Security teams should preserve relevant headers and mailbox activity so suspicious messages can be investigated, removed, and used to identify affected accounts and other recipients.
A clever threat campaign is abusing GitHub repositories to distribute malware targeting users who frequent an open source project repository or are subscribed to email notifications from it. A malicious GitHub user opens a new "issue" on an open source repository falsely claiming that the project contains a "security vulnerability." [...]
Learn about the top 4 security automation use cases that can streamline your cybersecurity efforts. This guide covers reducing enriching indicators of compromise (IoCs), monitoring external attack surface(s), scanning for web application vulnerabilities and monitoring for leaked user credentials - specifically email addresses. [...]