How much was lost in the Aeternity hack?

The Aeternity hack resulted in $5.2M in losses on December 08, 2020.

What attack technique was used in the Aeternity exploit?

The Aeternity exploit utilized Validator Key Compromised. 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.

Aeternity Hack

TOTAL LOST $5.2M

Medium Dec 08, 2020 Validator Key Compromised aeternity

Affected Chain aeternity Incident surface

Recovered - No recovery reported

All-Time Rank #488 By amount stolen

Protocol Type CDP Target category

Incident Overview

Eternity (ENT) is a cryptocurrency . Users are able to generate ENT through the process of mining. Eternity has a current supply of 9,526,448.9772784 with 0 in circulation.

The last known price of Eternity is 0.00186 USD and is up 0.00 over the last 24 hours. It is currently trading on 1 active market(s) with $0.00 traded over the last 24 hours. More information can be found at http://ent.eternity-group.org/.

Incident Report

Protocol / Project Aeternity

Date of Incident December 08, 2020

Affected Chain(s) aeternity

Attack Technique Validator Key Compromised

Classification Key Compromise

Protocol Information

Protocol Type CDP

Official Website ent.eternity-group.org/

Protocol Twitter/X @Eternity_Group

Market Context at Time of Hack

Token Categories

Mineable Hybrid - PoW & PoS X11 Masternodes

Protocol Links

GitHub Reddit Telegram

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 Operational-security tradecraft (phishing, malware, leaked seed phrases, or insider access) to obtain treasury signing authority

Capital Required Minimal capital - only enough to cover gas while draining the compromised accounts

On-Chain Access Valid signing authority over the compromised wallets / multisig signers, allowing direct transfer of funds or stake authorization

Target Reconnaissance Identification of Aeternity's high-value treasury accounts and the authority / multisig structure controlling them

Execution Speed Speed to drain the compromised accounts before the team detects the breach and revokes signing authority or freezes the assets

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 Validator Key Compromised audit checklist and test coverage

If you're auditing a protocol with similar architecture to Aeternity, these are the critical security checks that could have prevented this incident (December 2020).

Verify all logic paths related to Validator Key Compromised 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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Threat Assessment

Severity Level

MEDIUM

Attack Vector Validator Key Compromised
Root Cause Key Compromise
Year 2020

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