Hack history / Monthly reports / 2021-11
Crypto hacks and thefts, November 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
$205.3M
20 thefts
vs the month before
−61%
−61% ($530.7M)
vs a year earlier
+102%
+102% ($101.9M)
Largest thefts
Ooki 05 · Phishing$55MMonoX 30 · Swap Logic Flaw$31MSnowdog DAO 28 · Rug Pull$30MSnowdog 25 · Liquidity Rug$30MCurve Finance 11 · Governance Attack$30MFarmers World 07 · Malicious Code Injection Attack$15.7MChainSwap 07 · Caller Impersonation$4.4MSquid Games 01 · Liquidity Rug$3.4MVesper Finance 03 · Spot Price Manipulation$3MVisor Finance 28 · Spot Price Manipulation$976K
How attackers got in
Insiders: rug pulls, frauds, collapses 3$63.4M
Phishing and scams 1$55M
Smart contract bug 8$52.5M
Price, oracle and governance 5$34.4M
Other 2$0
Bridge and cross-chain 1$0
By chain
Polygon 2$86M
Ethereum 8$69.7M
BNB Chain 6$64.3M
Avalanche 2$60M
Bitcoin 1$31M
not stated 5$15.7M
By target
DeFi protocol 9$125.9M
not stated 8$76M
Gaming 1$3.4M
Wallet 1$23K
Bridge 1$0
Collapses and frauds, counted apart
5 cases, $113.6M.
Cite this page
SwanBluechip, "Crypto hacks and thefts, November 2021", Crypto hack history, https://swan-hack-tracker.pages.dev/history/m/2021-11/ (data as of 2026-10-31).