Grand Base Hack

TOTAL LOST $1.7M
Medium Private Key Compromised (Unknown Method) / Access Control base

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain base Incident surface
Recovered - No recovery reported
All-Time Rank #698 By amount stolen
Protocol Type Exploit/Access control Target category

Incident Overview

Quick Summary

Grand Base faced a severe issue, resulting in the unauthorized minting of $GB tokens on the base chain and a subsequent massive decline in token value. Approximately $2M worth of assets, including 615 $ETH, were transferred to #ETH wallets.

Details of the Exploit

The security breach at Grand Base involved the compromise of their deployer's wallet, allowing the attacker to mint $GB tokens on #BASEChain without authorization. This incident triggered a significant devaluation of the token, with prices plummeting by more than 99%. Furthermore, the attacker managed to transfer around 615 $ETH, equivalent to $2M, to #ETH wallets.

The breach has prompted questions about the security measures in place and the possibility of a private key leak.

Block Data Reference

Deployer:

https://basescan.org/address/0xa288b6b8…a6ba07

Minting:

https://basescan.org/tx/0xe8b0af9a…9132d0

https://basescan.org/tx/0x74237dfd…4a7259

Swaps:

https://basescan.org/token/0x2af864fb…8d84a3?a=0xcfe5f1ba…6350fc

This is classified as a Access Control Attacks . Compare similar hacks →

Incident Report

Protocol / Project Grand Base
Date of Incident
Affected Chain(s) base
Attack Technique Private Key Compromised (Unknown Method) / Access Control
Classification Infrastructure / Other
Primary Source View Post-Mortem

Protocol Information

Protocol Type Exploit/Access control
Affected Token GB
Smart Contract Language Solidity
Official Website grandbase.io/
Protocol Twitter/X @grandbase_fi
Team Anonymous
Source Code Unverified

Market Context at Time of Hack

Token Categories
Memes Base Ecosystem
Protocol Links

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

If you're auditing a protocol with similar architecture to Grand Base, these are the critical security checks that could have prevented this incident (April 2024).

  • Verify all logic paths related to Private Key Compromised (Unknown Method) / Access Control are guarded by proper access controls and input validation - see the Access Control Attacks attack class for patterns
  • 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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Related Attack Classes

The technique used in this hack maps to these vulnerability classes in our security curriculum:

See all Access Control Attacks examples →

Access Control Attacks

Sources & References

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