https://www.trustnodes.com/2019/01/08/1-1-million-worth-of-etc-double-spent-in-a-51-attack$1.1 Million Worth of ETC Double Spent in a 51% Attack
Ethereum Classic (ETC) has seen 12 chain re-writings within the past 2-3 days, 8 of them going as far back as 75 blocks.
A number of these history revisions contained double spending.
According to Coinbase, 219,500 ETC, worth $1.1 million, were double spent through a 51% attack.
“Late on the evening of Saturday 1/5, our systems alerted us to a deep reorg in ETC that contained a double spend.
Our on-call engineers responded to the alert and worked to confirm the report through the night.
We determined that we would temporarily halt send/receive interaction with the ETC blockchain in order to safeguard customer funds,” Coinbase said.
The above has been confirmed by others, with the perpetrator remaining unknown.
Just as it is unknown whether the double spends were actually successful or who was at the receiving end of it.
Coinbase and Poloniex have stated they were unaffected.
“There’s been 8 that are >75 blocks.
The hashrate doesn’t appear to have come from ETH miners nor Nicehash, appeared out of nowhere.
Potentially new ASICs,” Anthony Lusardi, director at ETC Cooperative, said.
