> attackers stole approximately $1.5B from their multisig cold storage wallet. At this time, it appears the attackers compromised multiple signers’ devices, manipulated what signers saw in their wallet interface, and collected the required signatures while the signers believed they were conducting routine transactions.
If hackers can get remote access and 'manipulate what signers saw in their wallet interface' that doesn't sound like cold storage to me.
If hackers can get remote access and 'manipulate what signers saw in their wallet interface' that doesn't sound like cold storage to me.