At a glance: Automated domain monitoring, transfer locks, and MFA on registrar accounts are the most effective measures to prevent attacks during holiday periods when regular monitoring pauses.
While IT teams are understaffed during vacation season, attackers deliberately exploit vulnerabilities in domain and DNS management. Unobserved registrations, expired domains, and decommissioned certificates enable phishing, spoofing, and identity theft.
In the months of July through September, when holiday cover is frequently incomplete and monitoring alerts remain unread, systematic security gaps emerge in domain and DNS management. Attackers recognize this pattern and exploit it deliberately to penetrate corporate IT infrastructure. The risk is often underestimated because domains are frequently treated as low priority – although they directly control websites, email services, and authentication mechanisms.
Three attack patterns dominate the holiday season: First, expired or unrenewed domains are re-registered by attackers. Since these addresses are still anchored in external systems – for example as targets of email forwards, as referenced subdomains in parent DNS zones, or in SPF and DKIM records – attackers can intercept communication flows or impersonate legitimate senders. Second, attackers register lookalike domains with character transpositions, additional hyphens, or alternative top-level domains (typosquatting) to conduct phishing campaigns, CEO fraud, or fraudulent supplier correspondence. Third, automatic SSL certificate renewals can fail, causing legitimate corporate domains to be marked as “not secure” in browsers – while attackers using visually similar domains and valid certificates intercept users.
A structural problem exacerbates the situation: many companies lack a complete inventory of their domain portfolios. Domains from ended campaigns, subdomains of discontinued services, and forwards without active content remain undocumented and thus unprotected. According to the Global Domain Report 2026, .de ranks among the most secure ccTLDs globally – number 1 ahead of .ch, .ca, .nl, and .uk – but this security results from continuous active monitoring. When that fails, protection disappears.
To mitigate risk before the holiday season, the following measures should be implemented: Transfer Lock and Registrar Lock, available free from most registrars, prevent unauthorized domain transfers or deletions. Multi-factor authentication on all domain management accounts is the most effective protection against unauthorized access and should also be activated for cover staff – without password sharing. Automated domain monitoring detects new lookalike registrations, DNS changes, and certificate issues independently of manual effort and alerts responsible parties through secure channels.
Source: www.it-daily.net · Published 14 July 2026
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