How much was lost in the Void.Cash hack?

The Void.Cash hack resulted in $34K in losses on April 23, 2023.

What attack technique was used in the Void.Cash exploit?

The Void.Cash exploit utilized Rugpull. 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.

Void.Cash Hack

TOTAL LOST $34K

Low Apr 23, 2023 Rugpull

Affected Chain 2023 Incident surface

Recovered - No recovery reported

All-Time Rank #1800 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Quick Summary

Void.Cash project rugpulled by the deployer, who removed liquidity worth 34,148 $USD.

Details of the Exploit

Void.Cash is a decentralized protocol running on the Ethereum chain. The token $VCASH experienced an exit scam when its deployer removed all liquidity from the pool and sold tokens for 18.804 $ETH leading to slippage. Investigation revealed that funds were stolen which amounts to roughly 34,148 $USD at the time of the incident.

All stolen assets remain in the deployer's address.

Block Data Reference

Scammer Address:

https://etherscan.io/address/0xbd6b81ed…3c0e7c

Malicious Transaction:

https://etherscan.io/tx/0x552e65b7…d144f6

Incident Report

Protocol / Project Void.Cash

Date of Incident April 23, 2023

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type CDP

Affected Token VCASH

Official Website void.cash/

Protocol Twitter/X @voidcasherc

Team Anonymous

Source Code Verified On-Chain

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 rugpull and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Void.Cash's contract logic - root cause: token

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

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? Hard to catch — private key / OpSec failures are outside smart contract audit scope

Audited by Audit Report 1 — still lost $34K. Prior audits don't guarantee safety, especially after post-audit code changes.

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

Verify all logic paths related to Rugpull 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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Security Audit History

Audit Report 1 Report

Sources & References

01
Source 1 https://twitter.com/CertiKAlert/status/1650032695500750849

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Token
Year 2023

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