Fortifying Telecom Networks Against Cyber Intrusions

The rapid evolution of cybersecurity threats poses significant challenges to telecom networks, especially with the advent of 5G and other advanced technologies. Reports indicate that Communications Service Providers (CSPs) struggle to identify network blind spots and prevent attacks. Our most recent Threat Intelligence Report, published in partnership with Global Data, found that over 30 percent of CSP respondents reported eight or more breaches in the past year.

Sophisticated malware attacks, such as Linux backdoor GTPDOOR - discovered by security researcher HaxRob - are designed for covert operations within mobile carrier networks and can exploit vulnerabilities through the GPRS Roaming Exchange (GRX). These threats covertly communicate through routine network traffic, effectively bypassing traditional defenses like firewalls. As hackers become more adept at evading detection, the need for robust, multi-layered defense mechanisms becomes increasingly critical.

GTPDOOR's ability to blend seamlessly into routine network operations makes it a formidable threat. Leveraging the GTP-C protocol establishes covert communication channels with attackers' servers, allowing persistent and undetected access. This highlights a broader trend where cyber attackers exploit specific telecom technologies, bypassing traditional security measures and posing unique challenges to telecom operators.

Why do telcos need specialized Endpoint Detection and Response (EDR) to protect against cyber intrusions?

Telecom networks can be vulnerable to various attacks, including insider threats, ransomware, Distributed Denial of Service (DDoS), and sophisticated malware such as GTPDOOR. The constantly evolving threat landscape poses significant challenges for Security Operations teams, making it difficult to detect anomalies, respond in real time, and safeguard critical telecom infrastructure.

Moreover, telco network elements have unique requirements to meet the stringent requirements of core networks, such as high performance, availability, low latency, and easy maintenance. It is essential that EDR agents cause no resource competition with the elements and adapt swiftly to their hardware and software changes. They must also comply with regulatory requirements like the EU-wide NIS2 and United States Transportation Security Administration (TSA) requirements and operate based on 3GPP protocol specifications.

Safeguarding network elements demands a telco-tailored approach that eliminates blind spots and detects and responds to threats in real time without compromising the integrity and performance of network functions.

Strengthening cyber intrusion threat detection with NDR

To effectively combat evolving network- and endpoint threats, many telecom operators integrate Network Detection and Response (NDR) capabilities with EDR. By consolidating network elements and traffic data, operators achieve more comprehensive visibility across the network layer. What exactly does this correlation enable? It accelerates threat detection with more accurate information on malicious activities, even in potential blind spots created by agentless network functions or sophisticated EDR evasion tactics.

New technologies are effectively combining EDR and NDR capabilities in a single view and provide real-time threat detection with unified visibility of network functions, data, and traffic, eliminating network blind spots.

Achieving comprehensive telco cyber intrusion network protection

Advanced telecommunications networks go beyond mere connectivity, serving as the backbone of critical infrastructure and carrying services that demand global resilience against disruptions. The sophisticated threats exemplified by GTPDOOR highlight the need for robust cybersecurity measures. CSPs are recommended to invest in solutions tailored for multi-vendor telco networks to ensure resilience against such evolving threats.

These solutions incorporate intelligent sensors to detect intruders and leverage AI-powered techniques for real-time anomaly detection and automated threat response. A comprehensive approach ensures continuous monitoring, rapid response, and unified threat hunting, enabling CSPs to proactively mitigate threats. By adopting a multi-layered defense strategy, telecom operators can defend against sophisticated, telco-centric adversaries, safeguarding mission-critical network infrastructure and maintaining uninterrupted service for millions of subscribers.