The widespread use of e-mail communication for collaboration today makes it the primary target and easy entry point for cyberattacks in the APAC region.
In Singapore, the Cyber Security Agency of Singapore (CSA) warns that there is a rise in AI-assisted phishing attempts, many of which stem from emails. This cybersecurity challenge is particularly acute for small and medium-sized businesses (SMBs), which are disproportionately more vulnerable to attacks due to their limited resources and expertise.
Many users are unaware or unconcerned due to the trust they put in their inboxes. Cybercriminals are aware of this and are exploiting security gaps to gain access to sensitive data, deploy ransomware, steal credentials, or simply monetise their efforts through business email compromise attacks.
Understand how the threat actors are using e-mail threats
Understanding the nature of e-mail threats is the first step toward combating them. Phishing and associated forms of social engineering remain one of the most prevalent dangers, with attackers crafting believable messages designed to trick recipients into revealing confidential information.
By impersonating executives or trusted partners, attackers can manipulate employees into transferring funds or sharing sensitive information, leading to losses that can cripple organisations.
Similarly, credential theft poses yet another risk, where cybercriminals use fake login pages or deceptive prompts to harvest usernames and passwords. With these credentials, attackers can enter business networks and move laterally, gaining access to valuable data, or launch further attacks.
Ransomware is also a major concern when it comes to email security, with IDC reporting nearly 60 per cent of enterprises in the APAC region experienced ransomware attacks in 2023.
Attackers embed malicious links or attachments to e-mails that, after some user interaction, ultimately end with the exfiltration of sensitive company data and the encryption of critical files, and the demand of payment (ransom) for their release.
- Tony Anscombe is Chief Security Evangelist at ESET
The consequences can be devastating, from halting operations to reputational damage and incurring substantial financial losses.
Five ways to stop e-mail threats
Given the scale and sophistication of these threats, a prevention-first strategy is critical to reducing risks before they escalate. Some of the key steps and technologies to combat e-mail threats are:
- Advanced spam filters
Advanced spam filters are key to a robust email security strategy. These tools analyse incoming messages to identify and quarantine suspicious emails. Modern filters use machine learning to detect patterns and recognise phishing attempts, offering an effective first line of defense.
E-mail authentication protocols play a crucial role in preventing spoofing by verifying the legitimacy of messages and ensuring only authorized emails reach recipients.
- Cybersecurity awareness training
Fostering a culture of awareness within the organisation is incredibly important to combat email threats. While technology is a critical component of e-mail security, human behavior equally plays a significant role in protecting against malicious actors.
Creating a culture of security awareness within the organisation is essential to minimise risks, and this starts with leadership setting the tone through prioritsing cybersecurity awareness, allocating resources, and demonstrating commitment to prevention-first practices.
Clear policies and guidelines provide employees with a framework for safe email use, while a supportive environment encourages the reporting of suspicious messages without fear of reprimand.
Employees are often the first line of defense against cyberattacks, making regular training programs essential. These sessions can educate staff on identifying phishing attempts, understanding the risks associated with suspicious links, and reporting potential threats. Simulated exercises provide practical experience, helping employees recognise and respond to attacks effectively.
- Security audits
Regular audits of e-mail security systems are another key component of a prevention-first approach. These audits assess existing measures, identify general security gaps, and ensure compliance with evolving security standards. They provide an opportunity to fine-tune defenses and address gaps before they can be exploited.
- Password policy and authentication
Strong password policies and multi-factor authentication (MFA) add additional layers of protection. Requiring employees to create complex passwords and update them regularly reduces the likelihood of account compromise.
MFA enhances security by requiring a secondary form of verification, such as a one-time code or biometric scan, making it significantly harder for attackers to gain access even if credentials are stolen.
- Advanced security technologies
Advanced security technologies play an important role in defending against sophisticated threats. Endpoint security tools stop threats at the device level, while network monitoring tools continuously analyse traffic across the organisation’s network to detect malicious behavior.
Together, these tools provide comprehensive protection against a range of cyber threats. AI-driven platforms that detect abnormal behaviour and rapidly develop countermeasures are crucial for proactive defense. Investing in robust cloud e-mail security solutions with zero-day protection capabilities can significantly enhance organisational resilience.
Prevention-first is core to your e-mail security
The evolving nature of e-mail-based threats requires constant vigilance and adaptation, as cybercriminals refine their tactics to exploit various security gaps. A prevention-first approach to e-mail security is not only prudent but an essential tool to reduce the threat surface.
Prevention-first practices, combined with a culture of security awareness, can significantly reduce the risk of email-based attacks and protect an organisation’s most critical communication channel.
In today's rapidly evolving cyber landscape, waiting to respond to threats is no longer an option. The impact of a single e-mail breach can be far-reaching, disrupting operations, damaging reputations, and incurring significant financial losses.
Organisations must take a prevention-first approach, combining robust security measures with a culture of vigilance to stay ahead of attackers and safeguard their digital ecosystems.
Tony Anscombe is Chief Security Evangelist at ESET
