The digital virus may infect any AIs, infomorphs, or even inactive backups by targeting them on their home device (p. 143, TH). Cyberbrains may be similarly targeted. Treat this as an Opposed Test, pitting the victim’s Infosec skill vs. the virus’s Infection Rating. (Inactive backups get no defense.) Active Countermeasures (p. 140, TH) provides a +10 bonus. If the digital virus wins, the target is infected in 10 Action Turns, −1 turn per 10 full points of MoS.
Targets that succeed but lose the test are aware of the pending infection and suffer SV 1d10. They may attempt to shut down and reboot or otherwise sever the connection, but if they fail another Infosec vs. Infection Rating Opposed Test, the virus has already embedded itself and will continue the infection upon rebooting.