SMB exploiter errors

[VakarisZ]

Describe the bug

SMB exploiter throws errors when no credentials are configured.

The logic of SMB exploiter is flawed, because line 166 is:

return remote_full_path, SelectedCredentials(user, password, lm_hash, ntlm_hash), timestamp

But the user, password, lm_hash can be undefined.

Solution

Fix the logic. Maybe don't return the credentials at all, only set them in self.successful_credentials?

[mssalvatore]

Duplicate of #2599