The transaction was send to address unknown to me: 13k4rgQ6b9LdBt6pvgLR5MSV6wAhujFpgq -snip-
Looks like it's being used to receive hacked bitcoins not exclusive to Electrum, the chance of being fake Electrum the culprit slim.
It was reported here:
https://bitcoinwhoswho.com/address/13k4rgQ6b9LdBt6pvgLR5MSV6wAhujFpgq, expand the "
scam alert" portion.
What are the other installed applications you have in your phone?
And please answer the question in post#2, where did you stored your 12-word seed phrase? <-- must be the issue.
All applications on the phone are downloaded from the play store. These are applications from banks, cards, food delivery services and instant messengers. After the money was stolen, I carefully scanned the entire list, all the applications are pretty famous.
"the seed phrase is written on a piece of paper and is hidden in my personal safe. no one can access her. besides this, I specially changed the word order on paper, the correct order is known only to me."