shield Reentrancy · $15.7K loss

Bizness Hack: How $15.7K Was Lost in a Reentrancy (2024)

On December 2024, Bizness was exploited in a reentrancy, resulting in approximately $15.7K in losses. That makes the Bizness exploit the 352nd largest DeFi incident out of 690 documented in our archive.

Attack Mechanics: How the Bizness Reentrancy Played Out

Exploit Class Applied to Bizness

The Bizness incident on December 27, 2024 is classified as a Reentrancy. A malicious contract re-enters a vulnerable function before state is updated, letting it drain funds multiple times. In the full archive, Bizness is 1 of 51 documented reentrancy incidents.

Bizness in Context

At $15.7K, the Bizness exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — Curve (2023) at $41M.

Prior Reentrancy Before Bizness

The nearest reentrancy incident before Bizness was CloberDEX, 17 days earlier on December 10, 2024. The same exploit class surfaced again within the reentrancy attack surface.

Impact & Recovery for Bizness

Bizness Loss Figure

The Bizness exploit caused $15,700 in losses — a minor (<$1M) incident and the 99th largest of 188 documented in 2024.

Where Bizness Sits Among Reentrancy Attacks

Ranked by loss size, Bizness is the 25th largest of 51 reentrancy incidents documented. That puts the Bizness loss below the class average of $2.87M.

Timeline Since the Bizness Incident

The Bizness exploit occurred 1.3 years ago (473 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.

Primary Reference for Bizness

Public post-mortem / on-chain analysis for the Bizness incident: view source.

FAQ

How much did Bizness lose?

The Bizness exploit in December 2024 resulted in $15,700 in losses — the 99th largest of 188 DeFi incidents that year.

When did the Bizness hack happen?

The Bizness exploit was recorded on December 27, 2024 — 473 days ago.

What type of exploit hit Bizness?

The Bizness incident is classified as a Reentrancy. A malicious contract re-enters a vulnerable function before state is updated, letting it drain funds multiple times.

How common is the Reentrancy pattern seen at Bizness?

Our archive contains 51 documented reentrancy incidents. The Bizness incident is one of them.

How does Bizness compare to the largest Reentrancy attack?

The largest reentrancy incident in our archive is Curve (2023) at $41M. The Bizness loss is $15.7K.

How does blockchain technology potentially solve e-commerce security challenges?

Blockchain simplifies fraud detection and investigation by recording detailed and immutable transaction data.

What are the three main objectives considered in the algorithm's optimization process?

Return on investment, Sortino ratio, and the number of trades.