Because there aren't avilable tooltips, I'll simply rewrite the How To Play here (so people can scroll down and find it - since this page is the same one people see when they play):
Attack Vector - High rate of fire. Low Damage.
DDOS - Slows data. No Damage.
Firewall - High rate of fire. Low (but good) AOE Damage.
Wifi Pineapple - Low rate of fire. High Damage? Stealth.
Roothit - Low poison damage over time. Dumb targeting.
Redirect - Low rate of fire. Redirect Encryption enemies