On 12/10/2022 the Mu Bank v1.4 experienced a hack attack.
Here is the attack transaction. https://snowtrace.io/tx/0xab39a17cdc200c812ecbb05aead6e6f574712170eafbd73736b053b168555680
The attacker exploited 100,000 MU coins and 10,000 Mu Gold from the Mu Bank due to a flash loan attack.
This sent the price of mu and mu gold plumiting down over 80%
here's a link to an indepentend "report" of the hack