From 2-spyware.com
Sspq file virus is a Windows computer infection that is usually downloaded through file-sharing platforms. When it’s executed, the ransomware immediately starts what it’s developed for – encrypting all personal files (databases, documents, pics, archives, etc.) on the machine. Only system files are not locked but heavily altered to establish persistence.
During the encryption, original filenames are appended with the .sspq extension, and thereby they’re rendered useless, i.e., inaccessible. However, victims of this cyber attack shouldn’t worry as the contents of the data are not altered. Thus after using a necessary decryption tool, it can be unlocked and used again.