How can I detect Malware and/or viruses? I'm buying a used Droid phone (Verizon) that has been rooted.

Is there anyway to scan it for viruses (and more importantly) malware?
Or maybe even a firewall?

(I may be being overcautious).



Some preliminary research shows several malware apps. Well worth $1 or so.

I'd love any feedback on these.

Norton Mobile Security
Lookout Mobile Security
AVG / DroidSecurity Pro
Webroot Security
Trend Micro Mobile Security
I use DroidWall for this purpose - it's a firewall with a whitelist or blacklist configuration. Also AVG Antivirus Free and Lookout for detecting virus and other malware.

Set DroidWall to Whitelist mode with log enabled, which disables internet access for all apps and services except the ones you explicitly allow. Then use the phone for a while, open up all the apps once, restart the phone (all this to give a malicious app a chance to get activated). Then, open DroidWall and view its log. You'll see all the apps which tried to access the internet and the IP addresses they tried to connect to.