How much was lost in the Cypher hack?

The Cypher hack resulted in $1.0M in losses on August 07, 2023.

What attack technique was used in the Cypher exploit?

The Cypher exploit utilized Unknown. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

Cypher Hack

TOTAL LOST $1.0M

Medium Aug 07, 2023 Unknown solana

Affected Chain solana Incident surface

Recovered - No recovery reported

All-Time Rank #830 By amount stolen

Protocol Type Derivatives Target category

Incident Overview

Building Disneyland for derivatives on Solana.

Incident Report

Protocol / Project Cypher

Date of Incident August 07, 2023

Affected Chain(s) solana

Attack Technique Unknown

Primary Source View Post-Mortem

Protocol Information

Protocol Type Derivatives

Official Website cypherhq.io/cypr/

Protocol Twitter/X @cypher_protocol

Market Context at Time of Hack

Token Categories

Payments Base Ecosystem Binance Alpha Binance Alpha Airdrops Binance Ecosystem Neobank

Protocol Links

GitHub Discord

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of unknown and Rust/Anchor program internals and the Solana account model

Capital Required Seed capital to cover Solana network fees and initial position setup

On-Chain Access Ability to interact with solana Solana programs and deploy a custom exploit program or signer account

Protocol Analysis Identification of the exploitable vulnerability in Cypher's program logic

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single Solana transaction (atomic across instructions)

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Unknown audit checklist and test coverage

If you're auditing a protocol with similar architecture to Cypher, these are the critical security checks that could have prevented this incident (August 2023).

Verify all logic paths related to Unknown are guarded by proper access controls and input validation
Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Sources & References

01
Source 1 https://twitter.com/cypher_protocol/status/1688641036476731393

Threat Assessment

Severity Level

MEDIUM

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