The challenge for businesses in responding to the wave of APT attacks.

Given the complex nature of targeted attack campaigns (APTs) aimed at financial institutions and businesses in 2026, cybersecurity experts from VNPT Cyber ​​Immunity have provided in-depth analysis and practical incident response procedures to help businesses proactively protect their systems.

From an unusual sign to the journey of dismantling the APT campaign.

Advanced Persistent Threat (APT) attacks are becoming a leading threat to organizations' information infrastructure. Unlike conventional cyberattacks, APTs are often stealthy, prolonged, and targeted. Identifying and countering these campaigns requires businesses to shift from a "passive response" to a "proactive defense" mindset.

Analyzing the APT landscape in Vietnam and the Asian region in 2026, Mr. Nguyen Duy Binh, a cybersecurity expert (Security Operations Center, VNPT Cyber ​​Immunity), stated that identifying APTs cannot rely solely on a single alert, but requires a combination of threat intelligence data. For effective identification, businesses need to master three core layers of intelligence data: IoC - initial intrusion signs; IoA - signs indicating ongoing attack behavior; and TTPs - tactics, techniques, and operational procedures of the perpetrator.

"Continuously comparing this data with system logs, malware samples, and internal network traffic will help the security team accurately identify the perpetrator's modus operandi, thereby determining the relevant campaign and assessing the level of risk to the system," shared Mr. Nguyen Duy Binh.

From an incident response perspective, Mr. Bui Van Huy, a cybersecurity incident response expert at VNPT Cyber ​​Immunity, stated that the biggest challenge for businesses is handling incidents in the absence of complete initial intelligence data. Through real-world scenarios shared at the recent Security Talk series, the standardized process for dismantling an APT campaign includes a rigorous approach: detecting anomalies; gathering evidence; identifying the campaign; assessing the scope of impact; containing and blocking the attack.

Expert Bui Van Huy emphasized that the tracing process must go beyond the initial compromised device or account. Simultaneously, seamless coordination between the IT team, business operations department, communications, and corporate leadership is crucial to minimizing damage to both operations and the organization's reputation.

Early detection and procedural response

A common mistake businesses make is focusing only on immediate problem resolution (malware removal, server restoration) while neglecting to find the root cause. Attack chain modeling helps businesses see the entire process of the attacker's actions, thereby proactively preventing the risk of re-invasion.

To enhance defenses against targeted threats, experts recommend that businesses continuously monitor: maintaining 24/7 monitoring capabilities through a Security Operations Center (SOC); standardizing processes: building and regularly practicing APT incident response scenarios; and proactively defending against threats by hunting them down instead of waiting for warnings.

As a reputable cybersecurity brand under the VNPT Group, VNPT Cyber ​​Immunity currently provides a comprehensive information security solution ecosystem, helping organizations and businesses protect their digital assets against sophisticated attacks. The Security Talk series of seminars, regularly organized and initiated by VNPT Cyber ​​Immunity, also affirms its commitment to partnering with the community in disseminating knowledge and building a safe and reliable digital space.

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