First steps in protecting smart contracts
This article aims to offer valuable recommendations for individuals who are embarking on their journey into the realm of smart contract security. Furthermore, it serves as a valuable resource for smart contract developers seeking to enhance the security measures implemented within their own smart contracts.
What exactly is a smart contract, and what language do they use to write them?
A smart contract it is a piece of code that defines and enforces the rules and conditions for a specific digital transaction. Smart contracts automatically execute actions and transactions when predetermined conditions are met, without the need for intermediaries. They provide transparency, security, and efficiency in various applications such as financial transactions, supply chain management, and decentralized applications (dApps).
There are such programming languages as:
Solidity: The most popular programming language for creating smart contracts on the Ethereum blockchain is called Solidity. It is a contract-oriented, statically typed language with syntax resembling JavaScript. Solidity is supported by technologies like the Ethereum Virtual Machine (EVM) and the Truffle framework and was created expressly for building Ethereum smart contracts.
Vyper: The most popular programming language for creating smart contracts on the Ethereum blockchain is called Solidity. It is a contract-oriented, statically typed language with syntax resembling JavaScript. Solidity is supported by technologies like the Ethereum Virtual Machine (EVM) and the Truffle framework and was created expressly for building Ethereum smart contracts.
Rust: A systems programming language called Rust is well recognized for emphasizing concurrency, efficiency, and memory safety. The Substrate architecture, which underpins blockchain applications like Polkadot and Kusama, is growing in popularity for its use in creating smart contracts. For developing blockchain applications, Rust provides a high level of control and safety.
Chaincode (Go): Go may be used to create Chaincode, commonly referred to as “Smart Contracts” in the context of Hyperledger Fabric. Go is the main language for creating smart contracts on Hyperledger Fabric, an enterprise-grade blockchain infrastructure.
Michelson: The high-level, stack-based language Michelson is used to create smart contracts on the Tezos network. It is intended to guarantee the accuracy and security of Tezos smart contracts and features a formal verification-friendly architecture.
These are only some of the most well-known programming languages. Solidity is now the most widely used programming language. So, we advise you to use it as a starting point for your research into smart contract security.
Pentesting tools for smart contracts
Here, we’ll discuss the tools we employ and where you may find them. Let’s consider a few:
Mythril
Mythril is a security analysis tool for EVM bytecode. It detects security vulnerabilities in smart contracts built for Ethereum, Hedera, Quorum, Vechain, Roostock, Tron and other EVM-compatible blockchains. It uses symbolic execution, SMT solving and taint analysis to detect a variety of security vulnerabilities. It’s also used (in combination with other tools and techniques) in the MythX security analysis platform.
https://github.com/ConsenSys/mythril
Slither
Slither is a Solidity static analysis framework written in Python3. It runs a suite of vulnerability detectors, prints visual information about contract details, and provides an API to easily write custom analyses. Slither enables developers to find vulnerabilities, enhance their code comprehension, and quickly prototype custom analyses.
https://github.com/crytic/slither
Securify
Securify 2.0 is a security scanner for Ethereum smart contracts supported by the Ethereum Foundation и ChainSecurity. The core research behind Securify was conducted at the Secure, Reliable, and Intelligent Systems Lab at ETH Zurich.
https://github.com/eth-sri/securify2
Echidna
Echidna is a weird creature that eats bugs and is highly electrosensitive (with apologies to Jacob Stanley)
More seriously, Echidna is a Haskell program designed for fuzzing/property-based testing of Ethereum smart contracts. It uses sophisticated grammar-based fuzzing campaigns based on a contract ABI to falsify user-defined predicates or Solidity assertions. We designed Echidna with modularity in mind, so it can be easily extended to include new mutations or test specific contracts in specific cases.
https://github.com/crytic/echidna
Training grounds
Realizing that practice is very important, we offer you several training sites.
Сapturetheether
https://capturetheether.com/challenges/
There are 19 different tasks in different categories, which in turn will improve you as a specialist.
Openzeppelin
https://ethernaut.openzeppelin.com/
There are 30 different tasks in different categories, which in turn will improve you as a specialist.
DamnVulnerableDefi
https://www.damnvulnerabledefi.xyz/
There are 19 different tasks in different categories, which in turn will improve you as a specialist.
Висновок
You will discover information in this post to help you hone your smart contract auditing abilities. We have offered training grounds for enhancing practical abilities in addition to theoretical.
Інші Послуги
Insomnia Security Scanner
AI-powered web application security scanner by CQR. Automated vulnerability discovery, exploit verification, and detailed reporting for modern applications.
Дізнатися більше
Захист інфраструктури CRYEYE
Аудит безпеки за допомогою CryEye забезпечує інформаційну безпеку підприємства, захищаючи всю інфраструктуру.
Дізнатися більше Тестування на проникнення
Знайдіть вразливості у всій інфраструктурі вашого бізнесу раніше, ніж це зроблять хакери! У межах консалтингу з тестування на проникнення ми підберемо методи пентестів та інші індивідуальні рекомендації з кібербезпеки для вашого бізнесу.
Дізнатися більше Соціальна Інженерія
Simulate real-world phishing, vishing, and pretexting attacks to measure and improve your team's security awareness and response capabilities.
Дізнатися більше Тестування Продуктивності
Усі види тестування навантаження і продуктивності вашої системи від компанії CQR, що спеціалізується на онлайн-безпеці.
Дізнатися більше AI-Powered Vulnerability Assessment
Leverage artificial intelligence to discover, prioritize, and remediate vulnerabilities across your digital assets faster and more accurately than traditional scanners.
Дізнатися більше Cloud Security Audit (AWS / GCP / Azure)
Comprehensive security review of your cloud environments — IAM policies, network controls, data exposure, and misconfigurations across all major cloud platforms.
Дізнатися більше DevSecOps Integration
Embed security into every stage of your CI/CD pipeline. Automated SAST, DAST, SCA, and secret scanning so vulnerabilities are caught before they reach production.
Дізнатися більше API Security Testing
In-depth testing of REST, GraphQL, and SOAP APIs for authentication flaws, authorization bypasses, injection vulnerabilities, and data leakage risks.
Дізнатися більше Mobile Application Penetration Testing
Manual and automated security testing for iOS and Android applications — reverse engineering, runtime analysis, traffic interception, and backend API assessment.
Дізнатися більше IoT Security Assessment
Evaluate firmware, communication protocols, cloud backends, and physical interfaces of IoT devices to identify vulnerabilities before attackers do.
Дізнатися більше Blockchain & Smart Contract Audit
Formal verification and manual code review of smart contracts on Ethereum, Solana, and other chains. Detect reentrancy, overflow, and logic flaws before deployment.
Дізнатися більше Red Team Operations
Advanced adversary simulation using real attacker TTPs (MITRE ATT&CK) to test your detection, response, and overall security posture under realistic conditions.
Дізнатися більше Threat Intelligence & Monitoring
Continuous monitoring of threat feeds, dark web, and attacker infrastructure to provide actionable intelligence specific to your organization and industry.
Дізнатися більше Zero Trust Architecture Review
Assess and design your Zero Trust security model — identity verification, micro-segmentation, least-privilege access, and continuous validation controls.
Дізнатися більше Compliance Consulting (PCI DSS / SOC 2 / GDPR)
Expert guidance to achieve and maintain compliance with major security frameworks. Gap analysis, remediation roadmaps, and audit-readiness support.
Дізнатися більше Dark Web Monitoring
Continuous surveillance of dark web forums, marketplaces, and breach databases for leaked credentials, sensitive data, or mentions of your organization.
Дізнатися більше Phishing Simulation & Awareness Training
Controlled phishing campaigns combined with interactive security awareness training to build a human firewall across your entire organization.
Дізнатися більше Supply Chain Security Audit
Assess third-party vendor risks, open-source dependencies, and software supply chain integrity to prevent attacks like SolarWinds and Log4Shell.
Дізнатися більше Container & Kubernetes Security
Security review of Docker images, Kubernetes clusters, RBAC policies, network policies, and runtime configurations to harden your container infrastructure.
Дізнатися більше Web Application Firewall (WAF) Deployment
Professional WAF setup, rule tuning, and ongoing management to block SQL injection, XSS, CSRF, and other OWASP Top 10 threats in real time.
Дізнатися більше Bug Bounty Program Management
Full lifecycle management of your bug bounty program — scope definition, researcher coordination, triage, validation, and remediation tracking.
Дізнатися більше OSINT Investigation Services
Open-source intelligence gathering on individuals, organizations, and infrastructure. Ideal for pre-engagement recon, fraud investigation, and competitive analysis.
Дізнатися більше Digital Forensics & Incident Response
Rapid response to security breaches — evidence collection, malware analysis, attacker timeline reconstruction, and actionable remediation recommendations.
Дізнатися більше