01
Asset Protection
Wallet extensions are the gateway to Web3. Security vulnerabilities can lead to total loss of user funds and complete compromise of blockchain accounts.
[ Web3 Security ]
Wallet Extension
Security Testing
Protect your crypto wallet users with comprehensive security testing for browser extensions. We identify critical vulnerabilities in key management, transaction flows, and DApp integrations before attackers exploit them.
- Background ScriptsService worker analysis
- Key ManagementEncryption & storage
- Transaction FlowSigning & broadcasting
- DApp IntegrationProvider injection testing
- Full-Stack CoverageEnd-to-end wallet security
Why Wallet Extension Security Matters
With millions of users relying on wallet extensions, a single security flaw could compromise billions in crypto assets. Comprehensive testing is essential.
02
Attack Surface
Browser extensions operate in a privileged context, making them attractive targets for attackers seeking to intercept transactions or steal private keys.
03
User Trust
Users trust wallet extensions with their most valuable digital assets. Security breaches destroy reputation and cause irreversible financial loss.
[ Our Approach ]
Full-Stack Testing Methodology
Our structured approach covers every layer of wallet extension architecture to ensure complete security assessment.
- 01
Manifest & Architecture Analysis
Review manifest.json configuration, CSP policies, permissions, host permissions, and overall architecture design for security misconfigurations.
- 02
Key Management Testing
Analyze encryption mechanisms, key derivation, storage security, and decryption processes. Verify private keys never persist in memory longer than necessary.
- 03
Transaction & Message Flow
Test transaction signing, message passing between components, content script injection, and DApp provider integration for tampering vulnerabilities.
- 04
Vulnerability Discovery & Exploitation
Identify security flaws including XSS, CSRF, insecure storage, key exposure, and injection vulnerabilities. Safely validate exploitability.
- 05
DApp Integration Security
Verify provider API implementation, request validation, account exposure controls, and transaction confirmation mechanisms.
- 06
Dependency & Supply Chain
Analyze third-party dependencies for known vulnerabilities, malicious packages, and supply chain attack risks.
- 07
Build & Distribution Testing
Validate build process integrity, code obfuscation, release signing, and extension store submission security.
- 08
Remediation & Reporting
Provide detailed findings with proof of concept, impact analysis, and actionable remediation guidance specific to wallet security.
[ Coverage ]
Critical Vulnerability Areas
We conduct comprehensive testing across all critical areas of wallet extension security.
[ key material ]heap · live
- [01]
Private Key Exposure
Vulnerabilities allowing unauthorized access to encrypted or unencrypted private keys stored in memory or persistent storage.
- [02]
Transaction Interception
Attacks that modify transaction data before signing, allowing attackers to redirect funds or steal assets.
- [03]
Message Tampering
Insecure message passing between content scripts, background scripts, and UI allowing modification of sensitive data.
- [04]
Malicious DApp Injection
Vulnerabilities allowing malicious DApps to steal user accounts, request unauthorized transactions, or compromise the wallet.
- [05]
XSS & Code Injection
Cross-site scripting vulnerabilities allowing execution of arbitrary JavaScript within the wallet extension context.
- [06]
Storage Vulnerabilities
Insecure use of localStorage, IndexedDB, or chrome.storage APIs allowing unauthorized access to sensitive data.
- [07]
CSP Bypass
Content Security Policy misconfigurations or bypass techniques allowing injection of unauthorized scripts.
- [08]
Encryption Weaknesses
Weak encryption algorithms, poor key derivation, predictable nonces, or insecure random number generation.
- [09]
Session Hijacking
Attacks stealing or predicting session tokens allowing unauthorized transaction signing without user interaction.
- [10]
Manifest Misconfigurations
Overly permissive manifest permissions enabling unnecessary access to sensitive browser APIs.
- [11]
Dependency Vulnerabilities
Known vulnerabilities in third-party libraries and dependencies used by the wallet extension.
- [12]
Update & Distribution
Vulnerabilities in update mechanisms allowing installation of malicious wallet versions.
[ Deliverables ]
Comprehensive Reporting & Remediation
Our detailed reports provide actionable security insights with specific remediation guidance tailored to wallet extension development.
- 01
Executive Summary
High-level overview of findings, risk assessment, and strategic recommendations for leadership.
- 02
Detailed Technical Findings
In-depth analysis of each vulnerability with proof of concept, code examples, and exploitation details.
- 03
Architecture Review
Assessment of overall extension design, attack surface analysis, and architectural recommendations.
- 04
Remediation Guidance
Step-by-step fixes for identified vulnerabilities with code examples and best practice recommendations.
- 05
Retest & Verification
Follow-up testing to confirm successful remediation of identified security issues.
Sample Critical Finding
- Severity
- Critical
- Issue
- Unencrypted Private Key in Memory
- Location
walletController.ts:sigTransaction()- Impact
- Private keys exposed during transaction signing, allowing account compromise.
Secure Your Wallet Extension Today
Protect your users and their crypto assets with comprehensive security testing from our expert team of wallet security specialists.
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