Ethereum, the leading blockchain proof-of-stake blockchain, recorded its worst stretch of the year in terms of illicit flows last week.

Data tracked by Chainalysis shows that known illicit flows as a percentage of total flows on Ethereum reached nearly 2% for a period of several days last week. Between July 30 and August 5, the metric ranged between 1.7% and 1.82%, before returning to normal levels on August 6.

The highest recording prior to last week came in January, when illicit flows hit 1.46% of total flows on the network.

Spike coincides with Curve exploit

It is not clear exactly what prompted the spike, but it coincides with a high profile exploit of Curve Finance, the decentralized exchange — which shook DeFi last week.

Over $73 million was drained from Curve’s pools on …