How much was lost in the Cake Lock hack?

The Cake Lock hack resulted in $311K in losses on March 01, 2021.

What attack technique was used in the Cake Lock exploit?

The Cake Lock 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.

Cake Lock Hack

TOTAL LOST $311K

Low Mar 01, 2021 Rugpull binance

Affected Chain binance Incident surface

Recovered - No recovery reported

All-Time Rank #1133 By amount stolen

Protocol Type Exit Scam/Rugpull Target category

Incident Overview

The project was holding a fundraising event using TokenSale smart contract:

https://bscscan.com/address/0x571e9508…3f6846#code

The contract deployer was the final recipient of the funds from the presale:

https://bscscan.com/address/0xd580f1de…36a8ec#internaltx

After the presale, the initial liquidity was added by the contract deployer:

https://bscscan.com/tx/0x13297002…1a9106

The contract deployer removed a bigger part of the liquidity at:

https://bscscan.com/tx/0xbaeca20d…5c9321

The final part of the liquidity was removed by the contract deployer at:

https://bscscan.com/tx/0x614e9ea6…cd2337

Incident Report

Protocol / Project Cake Lock

Date of Incident March 01, 2021

Affected Chain(s) binance

Attack Technique Rugpull

Classification Yield Aggregator

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Affected Token LOCK

Official Website cakelock.tech/

Protocol Twitter/X @cakelockbsc

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 binance smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Cake Lock's contract logic - root cause: yield aggregator

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

If you're auditing a protocol with similar architecture to Cake Lock, these are the critical security checks that could have prevented this incident (March 2021).

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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Sources & References

01
Source 1 https://cakelock.tech/
02
Web Archive https://web.archive.org/web/20210226164833/https://cakelock.tech…

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Yield Aggregator
Year 2021

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