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Balancer DeFi Protocol Loses Over $128 Million in Major Hack

First seen 4 Nov 2025, 11:10 UTC • News.Bloomberglaw

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On November 3, 2025, the Balancer decentralized finance (DeFi) protocol suffered a significant exploit, resulting in losses estimated at over $128 million. The attack targeted Balancer's v2 pools, with funds being siphoned to the hacker's wallet across multiple blockchains. Balancer's team is investigating the incident in collaboration with blockchain security firms PeckShield and Cyvers.

ThreatCluster AI

Attack Flow

18 entities, 20 inferred relationships (STIX 2.1).

Technique (3)

Data Breach
Flash Loan Attack
Oracle Manipulation

Organization (11)

Arbitrum
Balancer
Balancer Protocol
Base
Berachain
Bybit
Ethereum
Optimism
Polygon
Sonic
X

Affected Platform (3)

Balancer V2
Balancer V3
Sonic Chain

Tool (1)

Tornado Cash

Relationships

Data Breach targets Balancer V2
Data Breach targets Balancer V3
Data Breach targets Sonic Chain
Flash Loan Attack targets Balancer V2
Flash Loan Attack targets Balancer V3
Flash Loan Attack targets Sonic Chain
Oracle Manipulation targets Balancer V2
Oracle Manipulation targets Balancer V3
Oracle Manipulation targets Sonic Chain
Tornado Cash related to Arbitrum
Tornado Cash related to Balancer
Tornado Cash related to Balancer Protocol
Tornado Cash related to Base
Tornado Cash related to Berachain
Tornado Cash related to Bybit
Tornado Cash related to Ethereum
Tornado Cash related to Optimism
Tornado Cash related to Polygon
Tornado Cash related to Sonic
Tornado Cash related to X

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Balancer DeFi Protocol Loses Over $128 Million in Major Hack

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