A rating 6 Agent(18), Unrestricted(+2, unwired) Would be a -bargian- buy.
Look at Worms and Viruses. This would be a clever way to introduce a very elite, and nasty, piece of software into the game world. Metamorphic engine would be a must.
I'd go with Exploit 7 - the big book does mention rating 7(14) programs as existing, and being very very elite/controlled/unavailable/milspec, and this sounds like a good chance to acquire some of that - with Shredder(+2R) for +2 crash tests(in 4A crashing is exploit ,not attack), Mute(+1), and Optimization 3(+1).
Pair that with Stealth 7, Mute, Ergonomic, optimization 3 and you should be golden. Ergonomic, because a shadowrunner's commlink should -always- run stealth.
edit: Optimization 3, because, really, its Free Lunch. Optimization 1 and 3 are the same availability adjustment. And you -may- want to run that program on nodes that only have a system of 4. Like your teams combat drones....or your Agent.
QUOTE (Orcus Blackweather @ Jan 13 2010, 04:25 PM)
No point in having attack and black hammer, just get the biofeedback option to your attack program.
Actually, Biofeedback isn't a valid option for an attack program - its not a databomb, nor simsense. I was looking at it recently - wanted to put BlackICE connection-jamming onto my attack program. The +12F also severely limits the rating, and thereby usefulness, of such a program. Its significantly easier to just make it yourself.