A friend had her PC and external HDD encrypted a long time ago by some Ransomware.
She didn't take note of the ransom message but gave me an encrypted file.
After running it through ID Ransomware today I got the message
Unable to determine ransomware.
Please make sure you are uploading a ransom note and encrypted sample file from the same infection.
This can happen if this is a new ransomware, or one that cannot be currently identified automatically.
You may post a new topic in the Ransomware Tech Support and Help forums on BleepingComputer for further assistance and analysis.
Please reference this case SHA1: 1635d15b83c79f2988cdf0c888a068d8e791059a
The encrypted file is XLSX file