这个题需要换一个pypykatz版本

pypykatz>=0.6.6

git clone https://github.com/skelsec/pypykatz.git

cd pypykatz&python3 setup.py install

cd ..

wget https://raw.githubusercontent.com/daddycocoaman/volplugins/main/plugins/pypykatz.py -P new/

python3 vol.py -f OtterCTF.vmem -p new pypykatz

得到答案CTF{MortyIsReallyAnOtter}