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.
Emeraldwhale gang looked sharp – until it made a common S3 bucket mistake A criminal operation dubbed Emeraldwhale has been discovered after it dumped more than 15,000 credentials belonging to cloud service and email providers in an open AWS S3 bucket, according to security researchers.…
Russian SVR Targeting Government, Academia, Defense Organizations GloballyA Russian-state hacking group is posing as Microsoft employees and sending malicious configuration files as email attachments to target organizations across the world. The campaign has the hallmarks of a Midnight Blizzard phishing campaign although its use of an RDP configuration file is novel.
Microsoft announced today that inbound SMTP DANE with DNSSEC for Exchange Online, a new capability to boost email security and integrity, is now generally available. [...]