Bitcash.cz Hack

TOTAL LOST $161K
Low Other

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2013 Incident surface
Recovered - No recovery reported
All-Time Rank #1372 By amount stolen
Protocol Type Exploit/Other Target category

Incident Overview

Czech Republic-based bitcoin exchange Bitcash.cz has been hacked and up to 4,000 customers’ wallets have been emptied.

According to Czech news site E15.cz, some 4,000 bitcoin wallets had been opened with Bitcash.cz, with a total value of over 2 million Czech koruna (roughly equivalent to $100,000).

A post on the company's Facebook page reads:

"Unfortunately, as we have already announced on our website Bitcash.cz, our server was attacked and compromised – including the wallets.

We are trying to resolve the situation, but we want to warn our users about fraudulent emails and scams [claiming to be from Bitcash].

We never ask anyone for access to his or her accounts or wallets nor ask for money.

We will inform you of any developments as soon as possible.

Thanks."

Incident Report

Protocol / Project Bitcash.cz
Date of Incident
Attack Technique Other
Classification CeFi
Primary Source View Post-Mortem

Protocol Information

Protocol Type Exploit/Other
Official Website bitcash.cz/
Protocol Twitter/X @btcash12
Team Anonymous
Source Code Unverified

Market Context at Time of Hack

Token Categories
BNB Chain 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 Deep understanding of other 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 Bitcash.cz's contract logic - root cause: cefi
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? Likely — with a thorough Other audit checklist and test coverage

If you're auditing a protocol with similar architecture to Bitcash.cz, these are the critical security checks that could have prevented this incident (November 2013).

  • Verify all logic paths related to Other 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

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