Cow Swap

Exploit

Estimated loss

$181.0K

VERDICT —UNRATED

Verdict pending. Auto-ingested incidents are reviewed before a public verdict is rendered.

▰ METHOD

Undisclosed

Root cause

Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.

▰ PROOF OF CONCEPT

DEFIHACKLABS

src/test/2023-02/CowSwap_exp.sol

view forked test on github ↗

Reproducible Foundry test fork from SunWeb3Sec/DeFiHackLabs. Clone the repo, run forge test against the file path above, and replay the exploit against a mainnet fork at the historical block. Use for reproduction only — not for live targets.

Forensic narrative

Security firm PeckShield reported that the hacker successfully drained roughly 551 BNB off CoW Swap into Tornado Cash, which was worth around $181,600 at the time of writing. Reported loss: $181,000.

Primary source

https://cointelegraph.com/news/cow-swap-hacker-milks-over-550-bnb-using-solver-exploit ↗

Sourced from

chainsec

Technical record