Nice memories

Note: The flag is the clear text password for river-security-xmas user.
On a IR mission we found that the threatactor dumped lsass file.
Can you rock our world and find the flag for us?

https://rsxc.no/35a2c6961adc6886665363b6f47c3a156356a91a4cf602416b250aa4daca4167/21-challenge.zip