AscenDEX Hack

TOTAL LOST $77.7M
High #97 All-Time Private Key Compromised / Access Control bsc ethereum polygon

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain bsc 3 chains affected
Recovered - No recovery reported
All-Time Rank #97 By amount stolen
Protocol Type Exploit/Access control Target category

Incident Overview

Quick Summary

AscendEx platform claims that one of their hot wallet's private keys was compromised and led to unauthorized transfers. The total lost amount is 77,700,000 $USD.

Details of the Exploit

AscendEx is a digital asset platform, that provides investing, trading, and earning opportunities.

On December 11, beginning at just before 8 PM UTC, AscendEX identified a number of unauthorized transfers from one of their hot wallets. Funds were drained from the hot wallet across three chains. Lost funds on Ethereum are 60,000,000 $USD worth of assets. 9,200,000 $USD on Binance Smart Chain, and 8,500,000 $USD on Polygon chain.

Stolen funds are already distributed between other external wallets. The list of the transferred out assets and their amount on Ethereum is on sources

Block Data Reference

Attacker addresses:

https://etherscan.io/address/0x2c6900b2…fb7e55

https://bscscan.com/address/0x2C6900b2…FB7E55

https://polygonscan.com/address/0x2C6900b2…FB7E55

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

Incident Report

Protocol / Project AscenDEX
Date of Incident
Affected Chain(s) bsc ethereum polygon
Attack Technique Private Key Compromised / Access Control
Classification Infrastructure / CeFi
Primary Source View Post-Mortem

Protocol Information

Protocol Type Exploit/Access control
Official Website ascendex.com/
Protocol Twitter/X @AscendEX_Global
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 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 AscenDEX'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 AscenDEX, these are the critical security checks that could have prevented this incident (December 2021).

  • Verify all logic paths related to Private Key Compromised / 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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