Ostium Exchange Hacked: $18 Million Stolen, Trading Frozen

A crypto trading platform just got robbed of $18 million — and had to shut down to stop the bleeding.

On Wednesday, a platform called Ostium paused all trading after a hacker drained roughly $18 million from one of its funds. Ostium is an "onchain perpetuals exchange" (a website where people trade contracts betting on whether prices will go up or down, all recorded directly on a blockchain). It runs on Arbitrum, a network built to make Ethereum transactions faster and cheaper.

The theft was first spotted by Blockaid, a blockchain security company. According to their report, the attacker tricked the system's price-checking tools by feeding it fake, future-dated price information. This created fake trading profits, which then triggered a real payout of about $18 million from the platform's vault (a shared pool of money that funds trades).

Here are the key facts:

• Amount stolen: ~$18 million in USDC (a "stablecoin" — a digital dollar always worth $1)
• Network involved: Arbitrum (a faster, cheaper version of Ethereum)
• How it worked: The hacker used fake price reports to fake a big winning trade
• Current status: All trading paused while the team investigates

What is the hacker doing with the money? Blockchain records show they are already trying to hide their tracks. They swapped the stolen USDC into Ethereum (ETH), a major cryptocurrency, using a tool called Kyber Network. Then they spread the ETH across many different wallets — a common trick to make the stolen funds harder to trace and freeze.

Ostium confirmed the problem on X (formerly Twitter), saying: *"We are aware of the issue... We have paused all trading. The team is investigating."*

The takeaway: This is a reminder that even modern crypto platforms can have hidden weaknesses. When flaws in the code get exploited, real money disappears fast — and once it's spread across the blockchain, recovering it is extremely difficult.

This is an AI-generated summary. Read the original article at: https://www.theblock.co/post/408450/ostium-pauses-trading-after-apparent-18-million-vault-exploit?utm_source=rss&utm_medium=rss