Terenval Crypto Glossary · Русская версия
Wallet drainer
A wallet drainer is malicious software, a contract interaction or a scam flow designed to obtain signatures, approvals or secrets that enable attackers to transfer a victim's crypto assets.
Published and reviewed: 2 October 2026.
A drainer may not need the seed phrase if it can persuade the user to approve a powerful token allowance or sign a harmful transaction.
How this concept appears in Terenval Wallet
Terenval users should treat unexpected WalletConnect sessions, approvals and signature requests as security-sensitive actions and verify them before signing.
Important: Disconnecting a dApp after a harmful approval may not revoke an on-chain allowance; the permission itself may need separate revocation.
A non-custodial mobile wallet for Bitcoin, Ethereum and supported L2/EVM networks.
Why the term matters
A drainer may not need the seed phrase if it can persuade the user to approve a powerful token allowance or sign a harmful transaction.
Disconnecting a dApp after a harmful approval may not revoke an on-chain allowance; the permission itself may need separate revocation.
Related terms
Related Terenval Answers
Sources and review
Terenval product statements are first-party information.