Hack history / 2019 / Hack or exploit
Ethereum Classic
Hack or exploit on Jan 6, 2019 · Forged Proof
ONE SOURCE · 1 SOURCE
Lost
$220K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,461
among thefts by dollars lost
What happened
A 51% attack on Ethereum Classic's Proof of Work chain allowed attackers to reorg the blockchain and double-spend 219,500 ETC on two separate occasions. Low mining hashrate and cheap rental hashpower via services like NiceHash enabled the attack.
Details
- Date
- Jan 6, 2019
- Kind
- Hack or exploit
- Method
- Forged Proof
- How in
- Bridge and cross-chain
- Target
- Chain
- Chains
- Ethereum Classic
Reported by
Related incidents
Verus-Ethereum Bridge 2026 · Hack or exploit · $7.5M
Verus-Ethereum Bridge 2026 · Hack or exploit · $11.6M
Prysm consensus client bug causes Ethereum validators to lose over $1 million 2025 · Hack or exploit · $1.2M
Ethereum Foundation 2024 · Hack or exploit · undisclosed
Ethereum Foundation 2023 · Hack or exploit · $9K
Verus-Ethereum Bridge 2026 · Hack or exploit · $11.6M
Prysm consensus client bug causes Ethereum validators to lose over $1 million 2025 · Hack or exploit · $1.2M
Ethereum Foundation 2024 · Hack or exploit · undisclosed
Ethereum Foundation 2023 · Hack or exploit · $9K
Cite this page
SwanBluechip, "Ethereum Classic hack, Jan 6, 2019: $220K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht9152456113/ (data as of 2026-10-31).