shield Reentrancy · $400K loss

ArcadiaFi Hack: How $400K Was Lost in a Reentrancy (2023)

On July 2023, ArcadiaFi was exploited in a reentrancy, resulting in approximately $400K in losses. That makes the ArcadiaFi exploit the 130th largest DeFi incident out of 690 documented in our archive.

Attack Mechanics: How the ArcadiaFi Reentrancy Played Out

Exploit Class Applied to ArcadiaFi

The ArcadiaFi incident on July 10, 2023 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, ArcadiaFi is 1 of 51 documented reentrancy incidents.

ArcadiaFi in Context

At $400K, the ArcadiaFi exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — Curve (2023) at $41M.

Prior Reentrancy Before ArcadiaFi

The nearest reentrancy incident before ArcadiaFi was Sturdy Finance, 28 days earlier on June 12, 2023 ($800K lost). The same exploit class surfaced again within the reentrancy attack surface.

Impact & Recovery for ArcadiaFi

ArcadiaFi Loss Figure

The ArcadiaFi exploit caused $400,000 in losses — a minor (<$1M) incident and the 50th largest of 214 documented in 2023. This single incident represents 0.1% of all tracked losses that year.

Where ArcadiaFi Sits Among Reentrancy Attacks

Ranked by loss size, ArcadiaFi is the 16th largest of 51 reentrancy incidents documented. That puts the ArcadiaFi loss below the class average of $2.87M.

Timeline Since the ArcadiaFi Incident

The ArcadiaFi exploit occurred 2.8 years ago (1,009 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.

Primary Reference for ArcadiaFi

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

FAQ

How much did ArcadiaFi lose?

The ArcadiaFi exploit in July 2023 resulted in $400,000 in losses — the 50th largest of 214 DeFi incidents that year.

When did the ArcadiaFi hack happen?

The ArcadiaFi exploit was recorded on July 10, 2023 — 1,009 days ago.

What type of exploit hit ArcadiaFi?

The ArcadiaFi 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 ArcadiaFi?

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

How does ArcadiaFi compare to the largest Reentrancy attack?

The largest reentrancy incident in our archive is Curve (2023) at $41M. The ArcadiaFi loss is $400K.

How does blockchain technology contribute to the digital economy?

Blockchain technology supports the digital economy by facilitating secure and transparent digital transactions, enabling smart contracts, and fostering innovation.

What is the ultimate goal of the proposed adversarial attack and defense methods?

To improve the security and robustness of time series classification systems against adversarial threats.