$90M in stolen crypto was seen moving.

A hacker known as the “Blockchain Bandit” has finally awakened from a six-year slumber and has begun to transfer his ill-gotten gains.

According to Chainalysis, around $90 million in crypto obtained from the attacker’s long-running “programmatic theft” since 2016 has started moving over the past week.

It contains 51,000 ether (ETH) and 470 Bitcoin (BTC) — worth a total of about $90 million — ditched the bandit for a new one, noted Channelysis:

“We suspect that the robber is moving his funds in view of the recent rise in prices.”

The hacker was dubbed the “blockchain bandit” because he was able to empty secure Ethereum wallets with weak private keys in a process called “ethercombing.”

The attacker’s “programmatic theft” process has stolen more than 10,000 wallets from individuals around the world since the first attack six years ago.

In 2019, Cointelegraph reported that a blockchain hacker managed to collect approx. 45,000 ETH by successfully guessing Those weak private keys.

A security analyst said he discovered the hacker by accident while researching private key generation. He noted at the time that the hacker had set up a node to automatically flush funds from addresses with weak keys.

The researchers identified 732 weak private keys linked to a total of 49,060 transactions. However, it is not clear how many of them were exploited by the robber.

“There was a guy with an address that was going around and taking money out of some keys that we had access to,” he said at the time.

Blockchain Bandit Crypto Moves Source: Chainalysis

Chainalysis produced a diagram showing the flow of funds, however, it did not address the target, only labeling them as “intermediate addresses”.

To avoid weak private keys, Chainalysis advises users to use well-known and trusted wallets and consider transferring funds to hardware wallets if large amounts of cryptocurrency are involved.

Related: Hackers Keeping Stolen Crypto: What’s the Long-Term Solution?

Also in 2019, a computer researcher The weakness of the wallet was discovered that has issued the same key pair to multiple users.