supervirus
/ˈsuːpəˌvʌɪrəs/ /ˈsjuːpəˌvʌɪrəs/noun
1 Medicine and Biology. A particularly infectious or dangerous virus, especially a virulent new strain for which no effective treatment has yet been developed.
2 Computing. A particularly destructive or sophisticated virus, especially one which is able to defeat standard antivirus software.
Origin
1950s; earliest use found in The New York Times. From super- + virus.