ETH Rangers Program Recap | Ethereum Basis Weblog

In late 2024, the Ethereum Basis, along with Secureum, The Purple Guild, and Safety Alliance (SEAL), launched the ETH Rangers Program, an initiative to supply stipends for people doing public items safety work within the Ethereum ecosystem.

The purpose of this system was simple: to fund impartial efforts that improve the resilience of the Ethereum ecosystem, and to acknowledge folks with demonstrated observe information of significant contributions to essential safety work that advantages Ethereum as an entire.

Now that the six month ETH Rangers Program has wrapped up, we wish to share the outcomes of the 17 stipend recipients’ work. The breadth of their output is spectacular, from vulnerability analysis and safety tooling, to schooling, risk intelligence, and incident response.

Throughout recipient initiatives, consolidated outcomes embrace:

• Over 5.8 million {dollars} in funds recovered or frozen
• Over 785 vulnerabilities, consumer bugs, and proof of ideas reported or cataloged
• Roughly 100 state sponsored operatives recognized throughout greater than groups
• Over 209,000 views and customers reached with risk consciousness and investigative content material
• 800+ groups engaged in sponsored safety challenges and investigations
• Over 80 workshops, talks, and technical or academic sources delivered
• 36+ incident responses dealt with
• 7+ open supply tooling repositories, frameworks, and implementations developed or improved

These ETH Rangers Program outcomes show the truth that securing a decentralized community requires a decentralized protection.

From protocol-level vulnerability analysis to international developer schooling, these impartial researchers constructed infrastructure that can multiply safety results throughout the complete ecosystem.

Challenge Highlights

SunSec – DeFiHackLabs

SunSec, with the DeFiHackLabs neighborhood, delivered a unprecedented quantity of safety schooling and tooling work. Over the stipend interval, DeFiHackLabs:

• Constructed an Incident Explorer platform for looking and analysing DeFi incidents with proof-of-concept (PoC) exploits and root trigger evaluation, masking 620+ PoCs to this point.
• Ran a PoC Summer time Contest that acquired 43 new proof-of-concept submissions from the neighborhood.
• Delivered six workshop classes at Korea College masking good contract bug lessons, auditing, and assault case evaluation.
• Partnered with HITCON CTF (717 collaborating groups) to create a Web3 safety problem.
• Had seven talks chosen at COSCUP 2025, masking matters from phishing to formal verification.
• Ran CTF coaching classes, writing campaigns, a Web3 Safety Membership, and a expertise referral program to attach white hats with employment alternatives.

The sheer scale of neighborhood activation right here is notable. DeFiHackLabs operates as a multiplier, turning one stipend into academic output that reaches a whole lot of safety researchers.

Ketman Challenge – DPRK IT Employee Investigations

One recipient used their stipend to construct and scale the Ketman Challenge, targeted on discovering and expelling North Korean (DPRK) IT staff who’ve infiltrated blockchain tasks below faux identities.

Over the stipend interval, they:

• Reached out to roughly 53 tasks and recognized round 100 totally different DPRK IT staff working inside Web3 organizations.
• Revealed investigative articles on ketman.org that reached over 3,300 energetic customers and 6,200 web page views, masking matters equivalent to account takeover ways, freelance platform infiltration, and DPRK-Russia connections.
• Developed and open-sourced gh-fake-analyzer, a GitHub profile evaluation device for detecting suspicious exercise patterns, now out there on PyPI.
• Co-authored the DPRK IT Staff Framework with SEAL, which has turn into a regular reference doc for the trade.
• Contributed knowledge to the Lazarus.group risk intelligence mission, with their work featured in a presentation at DEF CON.

This work straight addresses one of the crucial urgent operational safety threats going through the Ethereum ecosystem immediately.

Nick Bax – Incident Response and Risk Intelligence

Nick Bax contributed throughout a number of fronts, primarily by way of SEAL 911 incident response, DPRK risk mitigation, and public consciousness.

• Contributed to over 36 SEAL 911 tickets, together with helping with the Loopscale exploit incident response that resulted within the return of $5.8M.
• As a part of a staff, recognized and notified 30+ groups that they had been using DPRK IT staff, and coordinated the freezing of mid-six-figures of funds acquired by these staff.
• Created an consciousness video about DPRK “Pretend VC” scams that acquired 200,000 views on X, with a number of crypto executives publicly crediting it for serving to them keep away from being hacked.
• Recognized and disclosed a homoglyph assault utilized by the “ELUSIVE COMET” risk group to evade Zoom’s suspicious identify detection, ensuing within the vulnerability being patched.
• Represented SEAL at a US Division of Treasury roundtable on DPRK hacker mitigations and spoke at a convention at Interpol Headquarters in Lyon.

Guild Audits – Safety Training in Africa and Past

Guild Audits ran intensive good contract safety bootcamps, coaching the following era of Ethereum safety researchers.

• Bootcamp cohorts skilled researchers throughout Africa, Asia, Europe, and the Americas, who went on to report 110+ vulnerabilities throughout main audit contest platforms, together with Sherlock, Code4rena, Codehawks, Cantina, and Immunefi, with a number of college students rating within the prime 10 on leaderboards.
• College students revealed 55+ technical articles, proposed EIPs, replayed real-world hacks, and carried out pro-bono audits for open-source tasks equivalent to Coinsafe and SIR.
• On 8 November 2025, Guild Audits hosted Africa’s first Web3 Safety Summit, bringing collectively safety researchers, auditors, and builders from throughout the continent.

The capacity-building impression of Guild Audits’ good contract safety bootcamps is critical, making a pipeline of expert safety researchers in areas which were traditionally underrepresented within the Ethereum safety neighborhood.

Palina Tolmach – Kontrol: Usable Formal Verification

Palina Tolmach of Runtime Verification labored on bettering Kontrol, a proper verification device for Ethereum good contracts, to make the device extra accessible to builders and safety researchers.

Key Kontrol enhancements delivered embrace:

• Improved output readability – cleaner error messages, decoded failure causes, console.log help in proofs, and pretty-printed path circumstances, making proof outcomes far simpler to interpret.
• Counterexample era – when a proof fails, Kontrol can now mechanically generate a runnable Foundry check demonstrating the failure, drastically decreasing the iteration time for formal verification.
• Structured symbolic storage – automated era of typed storage representations by way of a brand new kontrol setup-storage command, simplifying proof setup.
• Complete documentation overhaul – created new guides for bytecode verification, dynamic varieties, debugging, and all supported cheatcodes.
• Lemma enhancements – upstreamed vital lemmas to KEVM for higher automated reasoning, together with help for immutable variables and whitelist cheatcodes.

All of this work is open supply at github.com/runtimeverification/kontrol, bettering the formal verification tooling panorama for all safety researchers.

Ethereum Execution Consumer DoS Analysis

A analysis staff developed a testing framework to systematically consider the robustness of Ethereum execution purchasers below message-flooding denial-of-service assaults.

By testing all 5 main execution purchasers (Geth, Besu, Erigon, Nethermind, and Reth) they found 14 bugs throughout totally different community protocol layers. These bugs can result in:

• Uneven CPU consumption – the place an attacker consumes far much less CPU than the sufferer (as much as 4x asymmetry in some circumstances).
• Denied data propagation – the place a sufferer node turns into unresponsive to see discovery or blockchain knowledge requests (affecting Besu, Erigon, and Nethermind).
• Node crashes – the place flooding assaults trigger out-of-memory errors and crash the sufferer node (affecting Nethermind, Reth, and Erigon).

The findings spotlight that no execution consumer is totally proof against message-flooding assaults, and additional efforts are wanted to develop efficient countermeasures (e.g., adaptive rate-limiting). The testing framework and outcomes have been shared with the Ethereum Basis’s Protocol Safety staff to tell additional consumer safety analysis.

Different Stipend Recipients

For brevity we couldn’t do a full write-up on all recipient tasks. The remaining recipients contributed throughout a variety of security-related public items:

Wanting Forward

The ETH Rangers Program got down to help folks doing unglamorous however important safety work for Ethereum.

The number of their contributions displays the breadth of what “public items safety” means in observe. It is about greater than discovering bugs; it’s additionally about constructing instruments, coaching folks, documenting information, responding to incidents, and making the ecosystem extra resilient.

By supporting public items safety work, this system built-in new instruments, analysis, and intelligence into the broader Ethereum ecosystem. This decentralized method to protection offers a stronger basis for builders and customers worldwide.

We’re grateful to all 17 stipend recipients for his or her contributions, and particularly to The Purple Guild for his or her hands-on involvement in reviewing submissions, structuring milestones, and offering detailed suggestions all through the method. Thanks additionally to Secureum and Safety Alliance for his or her collaboration in establishing the Program.