When inside a host, are ICs spotted and identified?

Yes, they are spotted, unless they are running silent. Yes, they are identified as soon as they are spotted. (Word of Catalyst)

References
 * 1) "Matrix Perception against anything not running silent in a host is automatic" - Data Trails p87
 * 2) In A lesson in host invasion on Data Trails p87, the Probe IC is spotted and identified immediately, without an action.
 * 3) In the second part of the bank example (Core p225), it is noted that BK's deck "helpfully identifies" the Killer IC. This indicates that cyberdecks (and commlinks) serve a function in providing helpful information about matrix icons.