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.
How the Kimsuky nation-state group and other threat actors are exploiting poor email security — and what organizations can do to defend themselves.
BAE Systems Among Companies in the Sights of North Korean Cyberespionage GroupA North Korean cyberespionage group is posing as job recruiters and targeting aerospace and energy sector employees with lucrative job offers, according to Mandiant. The hackers use email and WhatsApp messages to lure victims into clicking a link that deploys backdoor malware onto their devices.
Many GitHub users this week received a novel phishing email warning of critical security holes in their code. Those who clicked the link for details were asked to distinguish themselves from bots by pressing a combination of keyboard keys that causes Microsoft Windows to download password-stealing malware. While it's unlikely that many programmers fell for this scam, it's notable because less targeted versions of it are likely to be far more successful against the average Windows user.
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." [...]
Critical infrastructure security undermined by weakness in email protection, researchers warn
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. [...]
Cybersecurity researchers have warned of ongoing phishing campaigns that abuse refresh entries in HTTP headers to deliver spoofed email login pages that are designed to harvest users' credentials