shield Arbitrary Call · $114K loss

January 2024: BmiZapper hit by an arbitrary call, losing $114K

On January 2024, BmiZapper was exploited in a arbitrary call, resulting in approximately $114K in losses. That makes the BmiZapper exploit the 202nd largest DeFi incident out of 690 documented in our archive.

Attack Mechanics: How the BmiZapper Arbitrary Call Played Out

Exploit Class Applied to BmiZapper

The BmiZapper incident on January 17, 2024 is classified as a Arbitrary Call. The contract executes an external call with attacker-controlled target or calldata, letting them impersonate the contract. In the full archive, BmiZapper is 1 of 21 documented arbitrary call incidents.

BmiZapper in Context

At $114K, the BmiZapper exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — Seneca (2024) at $6M.

Prior Arbitrary Call Before BmiZapper

The nearest arbitrary call incident before BmiZapper was UniBotRouter, 78 days earlier on October 31, 2023 ($83.9K lost). The same exploit class surfaced again within the arbitrary call attack surface.

BmiZapper Vulnerability Signature

The primary source categorises the BmiZapper exploit specifically as “Arbitrary external call vulnerability”. This narrower label is entity-specific: it reflects how the BmiZapper contract failed, rather than the broad arbitrary call pattern alone.

Impact & Recovery for BmiZapper

BmiZapper Loss Figure

The BmiZapper exploit caused $114,000 in losses — a minor (<$1M) incident and the 59th largest of 188 documented in 2024.

Where BmiZapper Sits Among Arbitrary Call Attacks

Ranked by loss size, BmiZapper is the 9th largest of 21 arbitrary call incidents documented. That puts the BmiZapper loss below the class average of $783.5K.

Timeline Since the BmiZapper Incident

The BmiZapper exploit occurred 2.2 years ago (818 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.

Primary Reference for BmiZapper

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

FAQ

How much did BmiZapper lose?

The BmiZapper exploit in January 2024 resulted in $114,000 in losses — the 59th largest of 188 DeFi incidents that year.

When did the BmiZapper hack happen?

The BmiZapper exploit was recorded on January 17, 2024 — 818 days ago.

What type of exploit hit BmiZapper?

The BmiZapper incident is classified as a Arbitrary Call. The contract executes an external call with attacker-controlled target or calldata, letting them impersonate the contract.

How common is the Arbitrary Call pattern seen at BmiZapper?

Our archive contains 21 documented arbitrary call incidents. The BmiZapper incident is one of them.

How does BmiZapper compare to the largest Arbitrary Call attack?

The largest arbitrary call incident in our archive is Seneca (2024) at $6M. The BmiZapper loss is $114K.

Explain how data is transmitted securely in the proposed system.

Data is encrypted before transmission and stored on the blockchain, ensuring secure, verifiable data exchange.

How are companies classified in terms of ESG commitments?

Using several ESG indicators collected on a monthly basis.