Multi-Sig & Operational Security Auditing
Your Code is Audited.
Your Keys Aren't.
$3.31 billion was stolen last year not through code bugs, through compromised keys, weak multisig setups, and phished signers. That's the layer most protocols have never tested.
Smart Contract Audits Cover 20% of the Actual Risk
Smart contract audits catch code-level vulnerabilities. But 80.5% of DeFi theft comes from operational failures: compromised private keys, weak multisig setups, missing timelocks, and social engineering of signers.
"A smart contract audit without an OPSEC audit is a vault with an unguarded keyhole. Your code can be flawless — if the keys controlling it are compromised, everything is lost."
DeFi Losses Jan 2023–Present
(ChainLight Lumos)
These Protocols Had been Audited. They Lost Billions Anyway.
Every single one of these hacks would have been caught or mitigated by a Web3 OPSEC & MultiSig Security Audit.
Malicious tx masked in Safe UI via supply chain/social engineering; signers blindly approved ownership transfer.
Private keys of 5/9 validators stolen (likely phishing); unauthorized tx approved undetected for 6 days.
Social engineering + pre-signed durable nonces on 2-of-5 Squads multisig; no smart contract vulnerabilities
Private key compromise on 2/5 community multisig signers (warnings ignored).
Malware via spoofed PDF infected 3/11 signers' hardware wallets; no multisig mentioned.
Smart contract bug (missing signature set ownership check); allowed fake minting despite validators.
North Korea Does Not Hack Code. They Hack People.
The Lazarus Group responsible for billions in crypto theft doesn't look for Solidity bugs. They send a PDF. They find the signer who uses their personal laptop. They send one Telegram message with a malicious link. Your smart contract audit has never tested for this. We do.
How secure is your protocol right now?
Check off each item honestly. Every unchecked box is an open attack vector.
This is a simplified version of our 30-item master checklist. The real audit goes much deeper.
Six domains. Zero blind spots.
DEPENDENCY LAYER
INFRASTRUCTURE LAYER
ON-CHAIN LAYER
CAPABILITY LAYER
HUMAN LAYER
TRANSACTION LAYER
From scoping to continuous protection.
A structured, repeatable methodology designed for audit firms and protocol teams. Every phase has clear inputs, outputs, and acceptance criteria.
Phase 01
Scoping & threat modeling
- Structured intake questionnaire for multi-sig inventory, key management, and ops.
- Develop protocol-specific threat models with adversary profiling.
- Assume at least one signer will be compromised.
Phase 02
On-chain deep-dive
- Perform bytecode verification, module and guard checks, threshold analysis, and timelock review.
- Build a full admin function inventory with fund-loss impact classification.
- Conduct on-chain parameter bounds testing.
- Audit oracle and liquidation mechanisms.
Phase 03
OPSEC & infrastructure assessment
- Inspect signer devices, key storage, and network security.
- Scan frontend CSP and API key exposure.
- Review DNS and CI/CD pipelines.
- Evaluat communication channel security.
Phase 04
Red team & adversarial testing
- Simulate social engineering attacks targeting signers.
- Test frontend transaction injection risks.
- Demonstrate RPC manipulation scenarios.
- Simulate supply chain attacks.
- Run combined-failure stress tests: k signers compromised, bots offline, stale oracle simultaneously.
Phase 05
Report & remediation roadmap
- Deliver severity-classified findings with PoCs and root cause analysis.
- Map admin function capabilities.
- Build a prioritized remediation roadmap with a 72-hour SLA for critical issues.
- Document accepted residual risks.
One firm. Two critical layers. Total coverage.
QuillAudits is the only firm offering both smart contract security and operational security from a single team that understands your entire architecture.
Smart Contract Audit
Our proven methodology securing $3B+ in protocol value. Code-level security for your contracts.
Solidity / Rust / Move review- Formal verification & fuzzing
- Logic & reentrancy analysis
- Flash loan attack simulation
- Gas optimization review
- QuillShield AI + manual review
OPSEC & Multisig Audit
The missing layer. Operational security for everything your code trusts to be safe.
- Private key management review
- MultiSig architecture assessment
- Signer security & device audit
- Timelock & governance analysis
- Social engineering resilience
- Incident response readiness
95% of the incidents we respond to were entirely preventable with basic operational security.
The Only Firm That Audits Both Your Code and Your Keys
Full-Stack Understanding
We audit your smart contracts AND your operations. One team that understands how your code, keys, governance, and people interact as a single attack surface.
1,500+ Audits Completed
$3B+ in digital assets secured across Ethereum, Solana, Base, Polygon, Arbitrum, BSC, Sui, Aptos, and 10+ more chains. Battle-tested methodology, not theory.
AI + Human + Vigilant Squad
QuillShield AI for initial scanning, senior auditors for deep review, and our Vigilant Squad of 10-12 independent researchers for maximum coverage and zero blind spots.
Built From Real Hacks
Our OPSEC methodology was built by reverse- engineering every major key compromise from Ronin to Bybit to Radiant. We know exactly what Lazarus Group looks for — because we've studied every attack they've run.
+20Multi-Chain Native
EVM, Solana (SPL/Anchor), Move (Sui/Aptos), CosmWasm. MultiSig patterns differ by chain. We know the nuances of Safe, Squads, Fireblocks, and native multisigs.
Post-Audit Monitoring
Our monitoring service extends to operational alerts: signer activity anomalies, governance proposals, timelock changes, and unusual admin function calls. Security doesn't end at the report.
