EASTER SEASON – A TIME OF ROTTEN EGGS IN IT SECURITY

Easter is synonymous with peace and quiet, long weekends and fewer people in the office. It is precisely this combination that has made public holidays a prime time for cyberattacks for years. Whilst decision-making processes take longer and IT teams are often only available to a limited extent, there is a noticeable rise in phishing campaigns and ransomware attacks.

Hackers’ hunting methods: more sophisticated than before

In the past, it was crude spam emails; today, attackers rely on precision and psychological tricks:

• Ransomware 2.0 (Double Extortion): It is no longer just about encrypting your data. In so-called ‘double extortion’, sensitive company data is first stolen unnoticed and then encrypted. The criminals therefore blackmail you twice: once for the decryption and once by threatening to publish your internal data on the dark web.
• Drive-by exploits: Here, you don’t even need to click on an attachment. Simply visiting a website that appears legitimate but is actually infected is enough. Malicious code installs itself in the background via unprotected browser vulnerabilities – completely unnoticed.
• AI-powered phishing: Thanks to generative AI, attackers can now compose error-free, personalised emails in perfect German. They disguise themselves as an Easter greeting from senior management or as an urgent parcel notification in order to steal login details.

Hunting for Easter eggs is a tradition. They exist in the software world too: small, hidden features (Easter eggs) that developers have left behind. But cybercriminals use this principle for logic bombs. This is malicious code that waits for an event like a digital time bomb – for example, Easter Sunday. These ‘rotten eggs’ are often planted weeks in advance and exploit the reduced monitoring during public holidays.

In the world of modern work, the boundaries are becoming blurred. Accessing company data via unsecured home Wi-Fi networks or using work devices for personal purposes over the holidays massively increases the attack surface. An infected personal device on the same network as a company laptop can serve as the starting point for a lateral attack on the entire cloud infrastructure.

You can reduce security risks with targeted, modern measures:

• Zero Trust & Multi-Factor Authentication (MFA): Trust is good, technical controls are better. MFA is now the most important line of defence against identity theft. The “Zero Trust” principle ensures that every access request – whether internal or external – is consistently verified.
• Advanced Email Security: Use solutions with sandboxing that check attachments and URLs in an isolated environment before they even reach the inbox. This renders even disguised phishing links harmless.
• Modern patch management: Keep browsers, operating systems and applications up to date. This is the only way to prevent drive-by exploits that take advantage of known vulnerabilities.
• EDR / XDR (Extended Detection & Response): Endpoint protection (EDR) alone is often no longer sufficient today. XDR goes a decisive step further: it correlates data across endpoints, networks and cloud services. This enables complex attack patterns to be detected and atypical processes (such as the initiation of encryption) to be stopped immediately.
• 24/7 monitoring by a SOC: Cybercriminals don’t take holidays. A Security Operations Centre (SOC) monitors your infrastructure around the clock. Professional analysts assess alerts in real time and intervene immediately if danger is imminent – even on Easter Sunday.
• Managed Backup & Disaster Recovery: An immutable backup is your ultimate safeguard against extortion attempts. Even if ransomware strikes, your data cannot be deleted or encrypted, guaranteeing a rapid recovery.