Infiltrating programs

• Insidious computer program
• Computer security concern
• Malicious programs such as Bond might use?
• Means of obtaining private information
• Sneaky programs
• Computer security threat
• Dangerous PC apps

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
by 2000, from spy + ending from software in the computer sense.

Wiktionary Word definitions in Wiktionary
n. (context Internet English) programs that surreptitiously monitor and report the actions of a computer user.