TRM Labs noted that the attacker behind the $6.3 billion Binance hack retained over $2.4 billion in Bitcoin and Ether that cannot be frozen by token issuers

From the articleBinance's $6.3 billion hack: What we know and what comes nextAlso in TRM and Chainalysis Tie $6.4B Binance Hack to North Korea's TraderTraitor - Decrypt, Binance Pegs Hot-Wallet Losses at $6.3 Billion, Vows to Cover Them as TRM Points to North Korea - Unchained