7 Techniques cybercriminals use to steal cryptocurrency

Cybercriminals initiate their schemes through fake airdrop campaigns or phishing tactics, often promoted on social media or via email. These campaigns entice users with promises of free tokens or other rewards, creating a facade of legitimacy.

Respondents to these campaigns are directed to fraudulent websites meticulously designed to resemble authentic token distribution platforms or wallet interfaces. Users find it challenging to differentiate between fake and genuine sites.

Once on deceptive sites, users are prompted to connect their digital wallets. Under the guise of verifying identity or account information for token claims, this seemingly harmless step sets the stage for subsequent theft.

Users are led to interact with malicious smart contracts, often disguised as a necessary step to claim promised airdrops or benefits. These contracts include hidden functions that, when executed, compromise the security settings of the user's wallet or trigger unauthorized transactions.

Cybercriminals manipulate the 'Permit' function in ERC-20 tokens, tricking users into approving a spender's address off-chain with their private key. This allows the attacker to transfer tokens on the user's behalf without the need for on-chain transactions, making their actions less noticeable.

Once access is gained, attackers transfer assets out of the user's wallet. They employ tactics such as cryptocurrency mixers and multiple transfers to obscure the trail of stolen assets, complicating the process of tracking and recovery.

Techniques like off-chain signing, as seen in the 'Permit' function, leave no direct trace on the blockchain. The absence of a clear on-chain transaction makes it exceptionally challenging to detect and trace fraudulent activities.