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BlockSec Has Closed the Seed Funding Raising

December 28, 2021

1 min read

We are glad to announce that BlockSec has closed the seed funding raising that was led by Fenbushi Capital, with participation from A&T Capital, Qulian, Impossible Finance, Incuba Alpha and NEAR MetaWeb Ventures.

Founded in 2021, BlockSec has served over 50 clients and has protected over thousands of millions worth of digital assets in this year. It has the online transaction virtualization system for both BSC and Ethereum (https://tx.blocksecteam.com) and Flash Loan monitoring system (https://versatile.blocksecteam.com/flashloan) for both Ethereum and Cronos.

The BlockSec Team focuses on the security of the blockchain ecosystem, and collaborates with leading DeFi projects to secure their products. The team is founded by top-notch security researchers and experienced experts from both academia and industry. They have published multiple blockchain security papers in prestigious conferences, reported several zero-day attacks of DeFi applications, and released detailed analysis reports of high impact security incidents.

Web3 Attack Surfaces: A Penetration Testing Overview

Sep 4 2026Security Services

Web3 Attack Surfaces: A Penetration Testing Overview

Crypto institutions keep every traditional attack surface and add the money-handling chain on top of it. This article gives testers a practical abstraction of the running system: a four-component model—Application, Authorization and Signing, Blockchain Interaction, and Infrastructure—with each component's responsibility, representative implementations, and inherited attack surfaces. It then structures web3-specific coverage into five attack-surface areas, from production and automation operations through signing intent, approval and withdrawal chains, and fund logic to on-chain transactions and deployed contracts.

~$23M Lost: Cosmos EVM, Moonwell Exploits | BlockSec Weekly

Sep 4 2026Security Insights

~$23M Lost: Cosmos EVM, Moonwell Exploits | BlockSec Weekly

During the reporting period (2026/08/22 - 2026/08/30), we cover 5 blockchain security incidents totaling approximately $22.7M in losses; an estimated $74M-$119.5M was drained from Tectonic, most of it erased when Cronos was rolled back to its pre-exploit state. The highlight is a six-chain Cosmos EVM exploit series (~$5.7M realized), traced on TAC Chain, where a shared balance-synchronization bug chained an underflow and an overflow to drain a staking pool. The report also analyzes Moonwell's combined collateral-accounting and oracle price manipulation, Tectonic's combined oracle-price and receipt-token exchange-rate manipulation of low-liquidity collateral, an Ajna liquidation business-logic flaw, and a Rain Card Contract Exploit Series with an Ed25519 signature-verification bypass (Avici, Tria, and others) on Solana.

Rules of Engagement and Production Safety for Institutional Blockchain Penetration Testing

Sep 3 2026Security Services

Rules of Engagement and Production Safety for Institutional Blockchain Penetration Testing

A penetration test that touches signing, withdrawal, and ledger systems is prepared before it runs. This article follows the engagement lifecycle: turning a business decision into objective, scope, named owners, and authorized access; recording authority, permitted techniques, operating limits, prohibited activity, communications, and evidence handling in a Rules of Engagement document; and protecting live service with measurable stop criteria, monitoring, change coordination, and named pause authority. It closes with the remediation and retest that turn findings into validated controls.