Visor Finance
Summary
Visor Finance was an Ethereum-based DeFi protocol offering active liquidity management for Uniswap v3 concentrated liquidity positions via smart-contract vaults called Hypervisors. The protocol suffered three separate security incidents in 2021 — an admin-key compromise in June ($500K), a price-manipulation attack in November (alleged $773K), and a critical reentrancy exploit in December that drained approximately $8.2M in VISR tokens from the vVISR staking contract. Following the December exploit, Visor merged with co-funded research arm Gamma Strategies in January 2022 and rebranded entirely, migrating token holders to the GAMMA token.
Connected Entities
1 entities · 10 linked investigationsTimeline(9 events)
2021-05-01
Visor Finance launches active liquidity management beta on Uniswap v3.
Visor Finance Medium2021-05-01
Visor Finance funds the creation of Gamma, an active LP research organization, with an initial $500,000.
Visor Finance Medium2021-06-19
Admin key compromise results in $500K stolen from unpositioned Hypervisor deposits. Visor covers losses from treasury.
Yahoo Finance / Visor Finance post-mortem2021-07-12
CertiK delivers Hypervisor audit report; no critical or major findings reported across 10 total findings.
CertiK Security Leaderboard2021-11-25
Price manipulation attack against OHM-ETH Hypervisor using Uniswap v3 spot price dependency. Visor characterizes it as arbitrage; independent estimates put losses at $773K. Treasury covers losses.
Quadriga Initiative2021-12-21
Critical reentrancy exploit drains vVISR staking contract (RewardsHypervisor) of 8,812,958 VISR (~$8.2M). Attacker uses double-enter on deposit() to mint 195M vVISR certificates then redeems for underlying VISR. Funds laundered via Tornado Cash. VISR token price collapses over 97%.
Rekt News / BEOSIN Analysis2021-12-23
Visor Finance announces merger with Gamma Strategies, token migration to GAMMA using pre-exploit snapshot, and post-rebrand security commitments including Quantstamp and ConsenSys Diligence audits.
Gamma Strategies Medium2022-01-01
Visor Finance fully merges into Gamma Strategies. GAMMA token distributed to all VISR/vVISR/tVISR holders. Visor web properties transferred to Gamma brand.
Gamma Strategies MediumDecision Log
- hash: 3cEbNnZsdLovHitbsqpuHKpWwDGHuCcmcxqmrgs5rJdX
This investigation is cryptographically anchored to the Solana blockchain and source URLs are archived via the Internet Archive.
model: claude-sonnet-4-5
generated: 5/30/2026, 1:00:32 PM
last updated: 5/30/2026, 1:00:36 PM
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