Maintainers behind multichain crypto wallet Atomic Wallet are investigating a series of security incidents where some of customers’ wallets have been hacked and digital coins stolen. Reports have surfaced of tokens being lost, transaction histories being erased, and even entire crypto portfolios being stolen.

According to an analysis from on-chain analyst ZachXBT, at least $35 million worth of crypto assets has been siphoned from the users’ wallets since June 2, 2023. The largest known individual theft so far involved almost $8 million in USDT (Tether). Other individuals lost $2.8 million in USDT and 1,897 ETH (approx. $3.5 million).

Atomic Wallet is a non-custodial decentralized wallet, meaning that the user owns their backup phrase and private keys, thus, fully controlling the funds.

Following multiple reports of wallet compromises, Atomic confirmed that they were aware of the issue and were investigating the attacks, but didn’t provide any additional details on how exactly the wallets were breached. The company has since taken down the wallet software download page.

Atomic said that “at the moment less than 1% of our monthly active users have been affected/reported,” but the number of affected users can be much higher as reports of loss of funds have been continuing to surface at the time of writing.