You don't need to invent scenarios, you can use the facts of this case.
Manning already had access and didn't need the password to be cracked. Wikileaks already received information from Manning. Someone in the chat log told Manning they would pass the hash to someone else. They then told Manning "no luck so far".
Keep in mind, they haven't provided any proof that the person Manning was talking to was Assange. They haven't provided any proof that Assange did in fact try to crack it He never wrote that he would try, only that he would pass it on. Or that he actually send the hash to someone else to crack it, and that this person did in fact tried to crack it.
And to top it all off, Manning did not need the password in the first place! People keep forgetting this. The case against Assange appears to be very weak and is probably only intended to get him on US soil to question him about things other than what he is charged with.
