An attitude of cynicism has 'infiltrated' the staff. [=the staff has become cynical]
Attempts to 'infiltrate' undercover agents into the gang have failed.
The gang was 'infiltrated' by undercover agents.
(..) - You are Bolt. - But I'm not... Who single handedly destroyed the green-eyed man's under sea labs? Me, but... And who foiled his plan to infiltrate the Olympics with nastic cyborgs? - Who, Bolt, who? Who? - Me, but none of them... You! You can, Bolt. Because, all over this planet... (..)2008 Bolt