Pokročilá trvalá hrozba (APT) je sofistikovaný typ kybernetického útoku, který se po delší dobu zaměřuje na konkrétní organizaci nebo jednotlivce s cílem odcizit citlivá data nebo duševní vlastnictví.

What is an advanced persistent threat (ATP)?

Advanced Persistent Threat (APT) is a type of targeted cyberattack in which attackers systematically and persistently focus on a specific organization, institution, or individual. The goal is to remain undetected for as long as possible, infiltrate systems, gain access to sensitive information, and gradually exfiltrate or misuse that data. APTs are sophisticated attacks, often supported or carried out by organized and well-resourced threat groups.

How to protect your business from APT occur in practice

Examples of real-world scenarios:

• Attackers infiltrate the company network via a phishing email disguised as an invoice containing malicious code.
• Once inside, they establish persistent access without being detected.
• Weeks or months later, they begin silently downloading business documents or technical schematics.
• The attack is coordinated externally – typically by a skilled and well-equipped team working toward a specific goal.
• The company suffers a data breach, but no one notices – the attacker is still active.

An APT isn’t a matter of hours or days; it often lasts for months or even years. The objective is strategic – stealing intellectual property, accessing trade secrets, or disrupting operations. Its stealth and persistence make it a serious threat to businesses of all sizes.

APT, malware, phishing, and common attacks

• APT vs. malware: Malware is malicious software and may be part of an APT, but it isn’t inherently targeted or long-term.
• APT vs. phishing: Phishing is often the starting point of an APT – like a deceptive email that tricks an employee into opening a harmful attachment. But phishing is typically a one-time event, whereas APTs are continuous and strategic.
• APT vs. Common Attacks: Most attacks are fast and aim for quick financial gain. APTs are deliberate, highly targeted, and can unfold over several months.

Why it matters: APTs require a comprehensive defense strategy – not just antivirus software or phishing awareness training.

What can a company do to detect and prevent APT?

APT doesn’t just target large companies – attackers also go after smaller organizations that often believe they’re not interesting enough to be attacked. This misconception works in the attackers’ favor. Preventing APTs is more demanding than stopping regular attacks, but investing in security is worth it. What can you do to detect and stop an APT attack in time?

• Implement regular monitoring of network and system events
• Deploy an anomaly detection system (e.g., SIEM)
• Regularly update software and applications
• Conduct penetration tests and security audits
• Train employees to recognize suspicious activity
• Have a ready-to-use incident response plan
• Keep offline backups of critical data
• Segment your network and restrict access
• Enable multi-factor authentication
• Monitor administrator and privileged account activity