The HBO Hack:
The hackers revealed that they have hacked the HBO and acquired the scripts of the Game of Thrones. However, none of them claimed or said anything about the episode.
According to the Gizmodo, the episode of the GOT was shared by a Reddit user. The file was uploaded to a Google Drive and its link was shared in the wild. Up till now that post has already been deleted. But we all know once something is released in the wild, the people starts to share it. Similar thing happened to the GOT episode 4 and now it is available on different Torrents.
Low Quality Water Marked Episode of Game of Thrones:
Well, it can be seen that the episode released in the wild is watermarked and is of low quality. This means, this episode has been leaked from some other source. The resources say that since the episode has the watermark of the Star India logo, which means the file was somehow released in the wild through from Star India.