In late 2024, a pivotal initiative aimed at bolstering the security of the Ethereum ecosystem was launched. The Ethereum Foundation, in collaboration with prominent security organizations Secureum, The Red Guild, and Security Alliance (SEAL), unveiled the ETH Rangers Program. This program was established with the clear objective of providing financial stipends to individuals dedicated to public goods security work within the Ethereum network. The initiative sought to foster and reward independent efforts that demonstrably enhance the ecosystem’s resilience and to acknowledge those with a proven track record of impactful contributions to Ethereum’s overall security.
Now that the six-month ETH Rangers Program has successfully concluded, the outcomes of the 17 stipend recipients’ work are being shared, revealing a diverse and impressive range of contributions. These efforts span critical areas such as in-depth vulnerability research, the development of essential security tooling, comprehensive educational initiatives, sophisticated threat intelligence gathering, and proactive incident response. The collective output from these independent researchers underscores a fundamental truth: securing a decentralized network like Ethereum necessitates a decentralized defense. Their work, ranging from protocol-level vulnerability analysis to global developer education, has yielded infrastructure and knowledge that will amplify security benefits across the entire Ethereum ecosystem.
Genesis of the ETH Rangers Program: A Strategic Imperative
The launch of the ETH Rangers Program was a direct response to the evolving security landscape of the burgeoning decentralized web. As Ethereum’s adoption and complexity grew, so did the potential attack surface. Recognizing that a robust security posture could not be solely reliant on a centralized team, the Ethereum Foundation, alongside its partners, envisioned a model that empowered and incentivized independent security professionals. The program’s design was intentionally broad, aiming to capture a wide spectrum of security contributions, from highly technical research to community-focused education.
The partnership with Secureum, The Red Guild, and SEAL brought together organizations with distinct yet complementary expertise. Secureum is known for its deep technical security research and auditing capabilities. The Red Guild, a collective of elite security professionals, offers a unique perspective on threat modeling and offensive security. Security Alliance (SEAL) focuses on fostering collaboration and standardization in blockchain security. This multi-faceted approach ensured that the program was well-equipped to identify and support the most impactful security work.
The stipends provided were not merely financial aid; they represented a commitment to valuing and sustaining the often under-recognized efforts of security researchers who work tirelessly to protect the network. The program’s six-month duration was designed to allow recipients sufficient time to undertake significant projects while providing a structured framework for reporting and evaluation.
Project Highlights: Pillars of Ethereum’s Decentralized Defense
The inaugural cohort of ETH Rangers delivered an array of critical security enhancements, demonstrating the power of decentralized security efforts.
SunSec – DeFiHackLabs: Scaling Security Education Through Community
SunSec, in collaboration with the DeFiHackLabs community, spearheaded an extraordinary volume of security education and tooling work. Over the course of the stipend period, DeFiHackLabs achieved significant milestones, including:
- Content Creation: Producing over 100 articles and tutorials focused on smart contract security, vulnerability analysis, and secure development practices. These resources were designed to be accessible to developers of varying skill levels.
- Tool Development: Contributing to the development and enhancement of several open-source security tools, making advanced security analysis more attainable for the wider community.
- Community Engagement: Organizing and hosting multiple webinars and workshops, reaching an estimated audience of over 5,000 developers and security enthusiasts globally.
- Bug Bounty Participation: Actively participating in bug bounty programs, identifying and reporting vulnerabilities in various DeFi protocols.
The sheer scale of community activation demonstrated by DeFiHackLabs is particularly noteworthy. The project operated as a powerful multiplier, effectively transforming a single stipend into widespread educational output that benefited hundreds of security researchers and developers. This approach highlights how community-driven initiatives can exponentially increase the impact of security investments.
Ketman Project – DPRK IT Worker Investigations: Addressing a Critical Threat
One recipient focused their stipend on a highly specific and pressing operational security threat: the infiltration of North Korean (DPRK) IT workers into blockchain projects. The Ketman Project, under this stipend, was scaled and enhanced to actively discover and facilitate the expulsion of these individuals who often operate under fraudulent identities.
During the stipend period, the Ketman Project achieved the following:
- Intelligence Gathering: Developed sophisticated methods for identifying North Korean operatives, utilizing open-source intelligence (OSINT), network analysis, and collaboration with cybersecurity firms.
- Reporting and Coordination: Successfully identified and reported over 50 suspected DPRK IT workers to relevant platforms and exchanges, leading to the termination of their engagements.
- Public Awareness: Published detailed reports and analyses on the tactics, techniques, and procedures (TTPs) employed by DPRK actors, raising awareness within the blockchain community and among regulators.
- Tooling Development: Created specialized tools to aid in the detection of forged identities and suspicious network activity associated with these actors.
This work directly addresses one of the most significant operational security threats currently facing the Ethereum ecosystem, safeguarding against potential malicious activities and network compromises orchestrated by state-sponsored actors.
Nick Bax – Incident Response and Threat Intelligence: A Multifaceted Contribution
Nick Bax made significant contributions across multiple critical security domains, primarily through his involvement with SEAL 911 incident response, DPRK threat mitigation, and public awareness campaigns. His efforts were instrumental in bolstering the ecosystem’s ability to react to and prepare for security incidents.
Key achievements include:
- Incident Response: Actively participated in and led incident response efforts for several high-profile security breaches within the Ethereum ecosystem, minimizing potential losses and aiding in recovery.
- Threat Mitigation: Contributed to the ongoing efforts to mitigate threats posed by DPRK actors, working in tandem with initiatives like the Ketman Project.
- Research and Reporting: Conducted in-depth research into emerging attack vectors and threat landscapes, publishing findings that informed the broader security community.
- Educational Outreach: Engaged in public awareness initiatives, educating developers and users about prevalent security risks and best practices.
Bax’s work exemplifies the vital role of experienced security professionals in both reactive incident management and proactive threat intelligence.
Guild Audits – Security Education in Africa and Beyond: Building Future Talent
Guild Audits took a proactive approach to capacity building by running intensive smart contract security bootcamps. The initiative aimed to train the next generation of Ethereum security researchers, with a particular focus on underserved regions.
The bootcamps achieved substantial outcomes:
- Curriculum Development: Designed and delivered comprehensive curricula covering smart contract auditing, vulnerability discovery, and secure coding practices.
- Participant Training: Successfully trained over 200 participants across multiple cohorts, equipping them with the skills necessary for professional security analysis.
- Regional Impact: Focused efforts on regions historically underrepresented in the blockchain security community, fostering a more diverse and global talent pool.
- Placement Assistance: Provided support and guidance to graduates in securing internships and employment within the blockchain security sector.
The capacity-building impact of Guild Audits’ smart contract security bootcamps is profound. By creating a pipeline of skilled security researchers, the program addresses a critical need for expertise, particularly in regions that have been historically overlooked. This investment in human capital is crucial for the long-term security and decentralization of the Ethereum network.
Palina Tolmach – Kontrol: Usable Formal Verification
Palina Tolmach, affiliated with Runtime Verification, focused on enhancing Kontrol, a formal verification tool designed for Ethereum smart contracts. The primary objective was to make this powerful tool more accessible and user-friendly for developers and security researchers.
Key Kontrol improvements delivered under the stipend include:
- Enhanced Usability: Streamlined the user interface and documentation, reducing the learning curve for new users.
- Expanded Coverage: Increased the range of smart contract patterns and constructs that Kontrol can effectively analyze.
- Integration Improvements: Facilitated smoother integration with existing development workflows and other security tools.
- Performance Optimizations: Implemented optimizations to improve the speed and efficiency of verification processes.
All of this work has been made open source and is available on GitHub, significantly contributing to the formal verification tooling landscape and empowering security researchers across the Ethereum ecosystem. Formal verification is a crucial, albeit complex, aspect of smart contract security, and making these tools more accessible democratizes advanced security practices.
Ethereum Execution Client DoS Research: Identifying Systemic Weaknesses
A dedicated research team developed a sophisticated testing framework to systematically evaluate the robustness of Ethereum execution clients under denial-of-service (DoS) attacks, specifically those involving message flooding. This initiative aimed to identify vulnerabilities in the core infrastructure that powers the Ethereum network.
By rigorously testing all five major execution clients – Geth, Besu, Erigon, Nethermind, and Reth – the team uncovered a significant number of bugs:
- Bug Discovery: Identified a total of 14 bugs across different network protocol layers of the execution clients.
- Impact Analysis: These bugs, if exploited, can lead to critical issues such as:
- Resource Exhaustion: Leading to performance degradation and potential network instability.
- Node Crashes: Causing temporary unavailability of network participants.
- Message Processing Failures: Disrupting the normal flow of transactions and consensus mechanisms.
The findings underscore a critical reality: no single execution client is entirely immune to message-flooding attacks. This research highlights the imperative for further efforts in developing effective countermeasures, such as adaptive rate-limiting mechanisms. The testing framework and the detailed results have been shared with the Ethereum Foundation’s Protocol Security team, providing invaluable data to inform future client security research and development.
Other Stipend Recipients: A Broad Spectrum of Security Contributions
While detailed write-ups were not feasible for every recipient due to brevity, the remaining ETH Rangers also made substantial contributions across a wide spectrum of security-related public goods. These diverse efforts highlight the multifaceted nature of "public goods security" in practice.
| Recipient | Output |
|---|---|
| Kelsie Nabben | Authored a book, "Decentralised Digital Security: A Community in Inscriptions," based on 2.5 years of ethnographic research into decentralized digital security communities, including SEAL. |
| Mothra team | Developed Mothra, a Ghidra extension for EVM bytecode reverse engineering, with added support for EOF decompilation. Detailed technical write-ups on the development process were published. |
| SomaXBT | Published a comprehensive four-part series on blockchain forensics and the crypto threat landscape, covering fund tracing, attribution techniques, and OSINT methodologies. |
| Peter Kacherginsky | Launched BlockThreat, a platform for blockchain threat intelligence that analyzes past blockchain security incidents and their root causes to inform future prevention strategies. |
| Attack Vectors | Created attackvectors.org, an open-source, continuously updated guide detailing the top attack vectors in DeFi with corresponding prevention strategies. They also contributed to SEAL’s Wallet Security Framework and became a SEAL Steward. |
| Tim Fan | Developed D2PFuzz, a DevP2P protocol fuzzing framework incorporating differential testing across multiple execution layer clients, successfully identifying bugs through both single-client and cross-client testing. |
| nft_dreww | Published insightful security articles, conducted educational classes through Boring Security, and completed security audits on various Ethereum public goods projects. |
| Jean-Loïc Mugnier | Developed a Web3 transaction simulation Chrome extension that intercepts and simulates transactions before they are finalized by the wallet, alongside research into simulation spoofing techniques. |
| Alexandre Melo | Produced a series of security workshop videos covering topics such as fuzzing, smart accounts, AI-driven auditing, Solana security, and zero-knowledge proofs. |
| Ho Nhut Minh | Enhanced CuEVM, a GPU-accelerated EVM implementation, by adding multi-GPU support and a Golang library for integration with the Medusa fuzzer. Performance benchmarks were conducted on Nvidia H100 GPUs. |
| Sergio Garcia | Built the Tracelon Monitoring Bot, a Telegram bot providing real-time block monitoring for Ethereum, Bitcoin, and Base, with alerts for ERC20 balance changes. He also continued contributing to SEAL 911 incident response efforts. |
Looking Ahead: Sustaining Decentralized Security
The ETH Rangers Program successfully demonstrated that supporting public goods security work is essential for the health and resilience of the Ethereum ecosystem. The variety of contributions from the inaugural cohort underscores the broad scope of "public goods security," extending beyond bug discovery to encompass tool development, education, knowledge dissemination, incident response, and the overall strengthening of the ecosystem.
By actively funding and promoting these security-focused initiatives, the program has integrated valuable new tools, research findings, and intelligence into the broader Ethereum landscape. This decentralized approach to defense builds a more robust and secure foundation for developers and users worldwide.
The Ethereum Foundation expresses its gratitude to all 17 stipend recipients for their invaluable contributions. Special thanks are extended to The Red Guild for their hands-on involvement in reviewing submissions, structuring project milestones, and providing detailed feedback throughout the program’s duration. Appreciation is also shared with Secureum and Security Alliance for their collaborative efforts in establishing and supporting the ETH Rangers Program. This initiative represents a significant step forward in ensuring the long-term security and integrity of the Ethereum network.

















