Need help :)

I've find a really old (2012) file with a shitload of email and password leaked, but i really have no clue how to decrypt the passwords, can anybody help?


This is an example to show how i see thepasswords i would like to decrypt:

[email protected]:3d9ee7ac924e5930a9351be4e9d66868
[email protected]:875b2455ae61978bf842241248c7a37f0adb3df6
[email protected]:acd3e7fb45776dbbc2bbe340286b947d280ee8c0

[email protected]:1212d0f93613dd7e37481f3ad6d152ef4f3841bc
[email protected]:462140fca4c8f31701efd9a67cf9b68db4538e36
[email protected]:2e03da28b6779b5809ab4d2b87a72a777c5ce929
[email protected]:4203ec0d659ba738538a0b5292189a0c68850ca0