Linux Ebury Found

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i test my 28 fedora system for Linux Ebury with this command line: ssh -G 2>&1 | grep -e illegal -e unknown > /dev/null && echo "System clean" || echo "System infected" and the terminal print : System Infected

i use RKhunter and Chkrootkit to confirm the founding and both have them didnt found Ebury. RKhunter : Ebury backdoor [ Not found ] Chkrootkit : Searching for Linux/Ebury - Operation Windi go ssh... not tested

can be this command line not accurate ? or i need to reinstall my system.