Neglected Domains Used in Malspam to Evade SPF and DMARC Security Protections
Jan 08, 2025
Email Security / Cybercrime
Cybersecurity researchers have found that bad actors are continuing to have success by spoofing sender email addresses as part of various malspam campaigns. Faking the sender address of an email is widely seen as an attempt to make the digital missive more legitimate and get past security mechanisms that could otherwise flag it as malicious. While there are safeguards such as DomainKeys Identified Mail (DKIM), Domain-based Message Authentication, Reporting and Conformance (DMARC), and Sender Policy Framework (SPF) that can be used to prevent spammers from spoofing well-known domains, such measures have increasingly led them to leverage old, neglected domains in their operations. In doing so, the email messages are likely to bypass security checks that rely on the domain age as a means to identify spam. DNS threat intelligence firm Infoblox, in a new analysis shared with The Hacker News, discovered that threat actors, including Muddling Meerkat and others, have abused some of it...