How much was lost in the The Onigiri Neko hack?

The The Onigiri Neko hack resulted in $10K in losses on July 09, 2023.

What attack technique was used in the The Onigiri Neko exploit?

The The Onigiri Neko 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.

The Onigiri Neko Hack

TOTAL LOST $10K

Low Jul 09, 2023 Rugpull

Affected Chain 2023 Incident surface

Recovered - No recovery reported

All-Time Rank #1941 By amount stolen

Protocol Type Exit Scam/Rugpull Target category

Incident Overview

Quick Summary

The ONIGI token recently experienced a rug pull incident, leading to a loss of approximately $10,000 USD in ONIGI tokens.

Details of the Exploit

The project team behind the The Onigiri Neko token executed a rug pull by calling withdrawOnigiri(uint256 _amount) function. After this tokens were sent to another EOA 0xfDE9a and swapped to the WETH.

Block Data Reference

Contract Creator: 0xF0db9ab3…A42573

Example withdrawOnigiri tx:

https://etherscan.io/tx/0x818afd0e…58de0d

https://etherscan.io/tx/0x2f25072a…e633c4

Sell TX example:

https://etherscan.io/tx/0x5d64a650…980690

Incident Report

Protocol / Project The Onigiri Neko

Date of Incident July 09, 2023

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Affected Token ONIGI

Protocol Twitter/X @TheOnigiriNeko

Team Anonymous

Source Code Unverified

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 The Onigiri Neko'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

If you're auditing a protocol with similar architecture to The Onigiri Neko, these are the critical security checks that could have prevented this incident (July 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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Sources & References

01
Source 1 https://twitter.com/cyversalerts/status/1678324154569818114?s=46…

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Token
Year 2023

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