Get ready for a mind-bending journey into the world of cyber espionage, where the lines between adversaries are blurring in unprecedented ways. We're talking about a new breed of collaboration among China-aligned cyber threat groups, and it's about to rock your world.
The Rise of Collaborative Tactics: Unveiling a New Cyber Threat Landscape
In the ever-evolving realm of cyber espionage, a fascinating trend has emerged that challenges our traditional understanding of threat attribution. Imagine a scenario where multiple advanced persistent threat (APT) groups, seemingly distinct entities, join forces to create a complex web of cyber campaigns. This is the reality we're exploring today.
Premier Pass-as-a-Service: Unlocking the Secrets of Advanced Collaboration
Enter the concept of "Premier Pass-as-a-Service," a term coined to describe the emerging trend of sophisticated collaboration between China-aligned APT groups. Picture this: Earth Estries and Earth Naga, two formidable cyber actors, team up to make modern cyberespionage even more intricate. By sharing access and resources, they complicate detection and attribution efforts, leaving security practitioners scratching their heads.
The Case Study: Earth Estries and Earth Naga's Unholy Alliance
Our case study delves into the intricate relationship between Earth Estries and Earth Naga. These groups, known for their persistent targeting of critical sectors like government agencies and telecommunications, have recently focused their efforts on retail and government-related organizations in the APAC region. But here's where it gets controversial: Earth Estries acts as an access broker, granting Earth Naga continued exploitation. This arrangement raises questions about the nature of their collaboration and the challenges it poses to traditional attribution methods.
Trend™ Research: Unveiling a New Framework for Understanding Collaborative Attacks
To help security practitioners navigate this complex landscape, Trend™ Research has developed a four-tier framework. This framework categorizes different types of collaborative attacks, providing a much-needed roadmap for understanding these evolving threats. With contributions from experts like Joseph C Chen, Vickie Su, and Lenart Bermejo, this report offers a comprehensive analysis of the Premier Pass case and the challenges it presents.
Earth Estries and Earth Naga: A Tale of Persistent Targeting
Earth Estries and Earth Naga have a history of targeting critical sectors across multiple regions. Earth Estries has focused on telecommunications and government entities in the US, Asia-Pacific, and the Middle East, while Earth Naga has actively pursued high-value organizations in strategic sectors, including government agencies, telecommunications, military manufacturers, and technology companies. Their recent campaigns have expanded to include retail and government-related organizations in APAC, indicating a strategic shift in their operations.
Evidence of Access Broker Activities: Uncovering Earth Estries' Role
Our investigation reveals that Earth Estries has operated as an access broker, sharing access with Earth Naga in specific campaigns. This behavior was identified in the TrillClient attack chains attributed to Earth Estries. The evidence suggests a possible operational linkage or access-sharing arrangement between the two threat groups, adding another layer of complexity to their collaborative operations.
Joint Operation: Unraveling the Intricacies of Earth Estries and Earth Naga's Attack
Figure 1 illustrates the attack infection chain observed within a Southeast Asian government entity. This case study provides valuable insights into the tactics, techniques, and procedures (TTPs) employed by Earth Estries and Earth Naga. The analysis reveals a sophisticated level of inter-group cooperation, with initial compromise, lateral movement, and deployment of toolsets all playing a part in their coordinated campaign.
Malware Toolkit and Post-Exploitation Tools: A Glimpse into Their Arsenal
The malware families involved in this incident include Draculoader, Cobalt Strike, CrowDoor, and ShadowPad. The infection flow and post-exploitation tools used by Earth Estries provide a glimpse into their tactical approach. From legitimate launchers vulnerable to DLL side-loading to custom memory dumping tools, their arsenal is diverse and sophisticated.
Recent Activities: Targeting Telecommunications Providers
Between April and July of this year, Earth Estries and Earth Naga attempted to gain access to major telecommunications providers in the APAC region and NATO member countries. Both groups demonstrated distinct, long-term targeting strategies, exploiting vulnerabilities and leveraging compromised servers to establish SSH connections and launch attacks on edge devices.
Defining Modern APT Collaborative Attacks: A New Paradigm
The complexity of attribution in modern cases demands a new set of definitions. We propose a scenario where, when certain criteria are met, multiple threat groups may be collaborating. This challenges the sole reliance on process chain analysis for attribution. Similar to how "ORB networks" operate as infrastructure providers, a specialized access broker service could facilitate such collaboration. We present a categorization of collaborative attack types, summarized in Table 2, to provide a clearer understanding of these evolving threats.
Emerging Trend: The "Premier Pass-as-a-Service" Model
The concept of "Premier Pass-as-a-Service" represents a new operational model within the ecosystem of China-aligned APT operations. This model provides direct access to critical assets, reducing the time spent on initial phases of an attack. It's like a "fast pass" service, granting efficient access to target assets. The strategic advantage lies in its efficiency and the reduced exposure risk, suggesting a small circle of threat actors utilizing this service.
Beyond the Diamond Model: Enhancing Analytic Approaches
To address the increasing complexity of attributing activity among China-aligned APT groups, we propose an enhanced analytic approach. This approach emphasizes identifying each threat actor's role within specific operational services, providing a more granular view of actor behavior and relationships. Key service categories include "Premier Pass" or initial access broker, Orb networks, and private toolsets or exploitation frameworks. By classifying operational roles, we can better understand the dynamics between threat groups.
Security Recommendations: Navigating the Collaborative Threat Landscape
The collaborative operations between Earth Estries and Earth Naga highlight the need for vigilant and multi-layered security strategies. Defenders must stay alert to suspicious file deployments, unauthorized remote administration, and targeted attacks on edge devices. Mitigation practices, such as verifying remote administration tools and monitoring edge devices, are crucial in detecting and responding to these evolving tactics.
Proactive Security with Trend Vision One™: A Holistic Approach
Trend Vision One™ is an AI-powered enterprise cybersecurity platform that offers a holistic approach to managing cyber risk exposure. It centralizes security operations and provides robust layered protection, helping enterprises predict and prevent threats. With Trend Vision One, security becomes a strategic partner for innovation, eliminating blind spots and focusing on what matters most.
Conclusion: Embracing a New Era of Collaborative Cyber Threats
Our research indicates that Earth Estries and Earth Naga, despite historical differences in their TTPs, have demonstrated a notable shift towards collaboration. The evidence of shared access and operational overlap suggests a new era of coordinated activity among China-aligned APT groups. This development challenges traditional attribution methods and highlights the need for a broader understanding of the evolving threat landscape. As we navigate this complex web of alliances, accurate attribution and effective cyber defense become increasingly crucial.
And this is the part most people miss: the indicators of compromise (IOCs) for this entry can be found here. Stay informed, stay vigilant, and join the conversation in the comments. How do you think we can adapt to this new era of collaborative cyber threats?
