How much was lost in the DiceSwap hack?

The DiceSwap hack resulted in $30K in losses on March 10, 2021.

What attack technique was used in the DiceSwap exploit?

The DiceSwap 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.

DiceSwap Hack

TOTAL LOST $30K

Low Mar 10, 2021 Rugpull binance

Affected Chain binance Incident surface

Recovered - No recovery reported

All-Time Rank #1834 By amount stolen

Protocol Type Dexs Target category

Incident Overview

The Master Chef contract contains hidden functionality under the set() function, which was invoked multiple times by the contract deployer at:

https://explorer.bitquery.io/bsc/txs/calls?internal=false&contract=0x08eee9c8…c21370&method=d9638422

Calling set() function led to the LP tokens and native tokens transfer onto the external wallet, example transaction:

https://bscscan.com/tx/0x6a16dd9f…3ecbf6

The liquidity was removed by the external wallet multiple times at:

https://bscscan.com/tx/0xb523ea3c…3065a4

https://bscscan.com/tx/0x3f6d3d3e…5cf0eb

https://bscscan.com/tx/0x751d3f47…3d5a12

https://bscscan.com/tx/0x3197c878…808af3

https://bscscan.com/tx/0x83d93a52…0c03a1

https://bscscan.com/tx/0x89b3c2fc…4fec5f

https://bscscan.com/tx/0x7880e9c3…603ff3

https://bscscan.com/tx/0xf25a25c7…d1a285

https://bscscan.com/tx/0x6a2ac8d4…f09385

Incident Report

Protocol / Project DiceSwap

Date of Incident March 10, 2021

Affected Chain(s) binance

Attack Technique Rugpull

Classification Exchange (DEX)

Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs

Affected Token DICE

Protocol Twitter/X @DiceSwap

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 DiceSwap's contract logic - root cause: exchange (dex)

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 DiceSwap, 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://twitter.com/DiceSwap

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Exchange (DEX)
Year 2021

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