Hack history / Monthly reports / 2021-03
Crypto hacks and thefts, March 2021
Thefts are hacks, exploits, phishing, scams and rug pulls, in dollars at the time. A single source for $500M or more waits for a second source before it counts.
Taken
$120.8M
18 thefts
vs the month before
+83%
+83% ($65.9M)
vs a year earlier
14×
14× ($8.5M)
Largest thefts
CNA 05 · Ransomware$40MMeerkat Finance 04 · Admin Drain$31MPaid Network 05 · Infinite Mint$27MTSD (True Seigniorage Dollar) 15 · Malicious Proposal$7.1MRoll 14 · Hot Wallet Key Compromised$5.7MDODO AMM 08 · Improper Access Control$3.8MDEUS Finance 15 · Spot Price Manipulation$3MTurtle Dex 20 · Liquidity Rug$2.5MSeascape 01 · Private Key Compromised$500KIron Finance 16 · Incorrect Share Accounting$170K
How attackers got in
Other 3$40M
Insiders: rug pulls, frauds, collapses 3$33.5M
Smart contract bug 6$31M
Price, oracle and governance 2$10.1M
Keys, accounts and infrastructure 4$6.2M
By chain
Ethereum 8$44.1M
BNB Chain 6$40.8M
not stated 4$40M
Fantom 1$3M
Polygon 1$170K
HECO 1$0
By target
DeFi protocol 10$80.8M
not stated 8$40M
Cite this page
SwanBluechip, "Crypto hacks and thefts, March 2021", Crypto hack history, https://swan-hack-tracker.pages.dev/history/m/2021-03/ (data as of 2026-11-01).