"For its part, ICBC has told users that its US division is back online and operational, the people said. One person familiar with the hack and investigation said a reason the bank could get back online quickly was that a key part of its trading system was unaffected by the attack — a server that was more than 20 years old, made by now-defunct IT equipment maker Novell Inc.. That server contained much of the bank’s trading data and capabilities and is so old that LockBit’s ransomware didn’t work on it, the person said."
Но статья не про это, для банка кстати не удивительно, да и вообще для корпоратов, наличие систем с 20+ стажем работы.