tokens: Moreover , incoming traffic from the C & C server began to use gzip compression , and the top-level domain for all C & Cs was .com : Since December 2016 , the changes in C & C communication methods have affected only how the relative path in the URL is generated : the pronounceable word was replaced by a rather long random combination of letters and numbers , for example , “ ozvi4malen7dwdh ” or “ f29u8oi77024clufhw1u5ws62 ” .