How to Defend Against Supply Chain Attacks

By Mark Watkinson

In today’s fast-paced business world, the interconnectedness of suppliers offers numerous advantages in terms of competition and efficiency. However, this also exposes organisations to a complex web of networks, making controlling and securing the supply chain challenging. Disruptions within the supply chain can have far-reaching consequences, affecting all companies involved. It is essential to recognise the risks associated with the entire supply chain, including its interconnected partners and providers. 

Understanding supply chain attacks

A supply chain attack, also known as a third-party attack, occurs when malicious actors gain access to an organisation’s systems through vulnerabilities in a partner or provider’s network. These risks can emerge from various sources and impact different stages of the supply chain. Sophisticated attackers target supply chains to bypass direct defences, facilitating lateral movement within a network and gaining access to otherwise well-protected targets. This makes supply chain attacks increasingly prevalent in today’s threat landscape, extending beyond suppliers to encompass consumers and partners as well. 

Identifying supply chain vulnerabilities 

Supply chain attacks can exploit weaknesses in supplier credentials or compromise supplier and customer portals. To counter these threats effectively, visibility becomes paramount. Understanding the tactics, techniques, and procedures (TTPs) employed by threat actors proficient in such attacks can aid in predicting their next moves and staying ahead of potential breaches. Utilising threat intelligence to simulate realistic scenarios allows organisations to assess their defences and understand the attackers’ ultimate objectives. 

Risk management strategies 

Testing the impact of potential breaches in different segments of the supply chain is essential. By assuming a breach and mapping the path to critical assets, organisations can evaluate the effectiveness of their controls and identify areas requiring additional protection. Implementing measures like two-factor authentication (2FA) can further strengthen the security posture and mitigate risks. 

Resource prioritisation for mitigation 

Identifying high-risk attack paths helps organisations prioritise remediation efforts and investments. Adopting a risk-based framework enables targeted risk reduction across various aspects of the organisation’s security operations, for example, vulnerability management, credentials management, posture changes, and security investments. 

Continual monitoring for ongoing security

Point-in-time discovery and testing may not be sufficient to catch temporary weaknesses or transient changes in the supply chain. Implementing a continual discovery, prioritisation, and validation approach ensures that organisations remain vigilant and maintain their risk tolerance levels within acceptable limits. 

Securing the supply chain is a collaborative effort involving all stakeholders. Organisations should establish robust communication and cooperation channels with suppliers, consumers, and partners to ensure collective protection against supply chain attacks. With a comprehensive approach encompassing risk management, resource prioritisation, and continuous monitoring, businesses can fortify their supply chains and safeguard their critical assets in the face of evolving threats. Remember, protecting your supply chain is protecting your business.

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