Orange Finance Hack

TOTAL LOST $840K
Low Private Key Compromised (Unknown Method) / Access Control arbitrum

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain arbitrum Incident surface
Recovered - No recovery reported
All-Time Rank #864 By amount stolen
Auditors 1 Prior security audit

Incident Overview

Quick Summary

On January 8, 2025, Orange Finance lost approximately $0.84 million when an attacker gained control of the project’s admin key, upgraded its contracts, and diverted funds to their own wallet.

Details of the Exploit

By compromising the admin key, the attacker obtained full privileges over the Orange Finance smart contracts. Using these privileges, they deployed an upgraded contract version that allowed them to siphon user funds from multiple vaults (including the Stryke vault and a now-closed Stable vault) into their own address. As soon as the exploit was discovered, Orange Finance warned users that the compromised contracts were no longer valid and advised them to revoke all approvals related to the platform.

Block Data Reference

Potentially Affected contracts:

0x22dd31a4…3C1162 0xe1B68841…217c2C 0x5f6D5a7e…8284e0 0x708790D7…848FaA 0xE3213228…d5f396 0x01E371c5…6253Ea 0x3D2692Bb…F112A9 0x49F60f02…d0c6BF 0x5bb109E8…1BA80d

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

Incident Report

Protocol / Project Orange Finance
Date of Incident
Affected Chain(s) arbitrum
Attack Technique Private Key Compromised (Unknown Method) / Access Control
Classification Infrastructure / Yield Aggregator
Primary Source View Post-Mortem

Protocol Information

Protocol Type Liquidity manager
Smart Contract Language Solidity
Official Website app.orangefinance.io/arbitrum
Protocol Twitter/X @0xOrangeFinance
Team Anonymous
Source Code Unverified

Market Context at Time of Hack

Token Categories
Polygon 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 Orange Finance'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
Audited by Audit Report 1 — still lost $840K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Orange Finance, these are the critical security checks that could have prevented this incident (January 2025).

  • 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

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Security Audit History

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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