1 pointOffline keys almost always end in t1 with the only exceptions being a few early variants from roughly a year ago.
1 pointThis is new variant of STOP-Djvu Ransomware + the versions numbers There are many variants, but everything has a common problem - can only decrypt files that were encrypted offline, this is not possible immediately, but only after the key database is updated. Need wait some days.
1 pointThis is a newer variant of STOP/Djvu. If you have an offline ID, then once we can find the decryption key for this variant and add it to our database you will be able to recover your files. However, if you have an online ID (which is more likely) then it will not be possible to recover your files. There is more information at the following link: https://support.emsisoft.com/topic/32045-about-the-stopdjvu-decrypter/