[gcb0]

If you want to get paranoid... Maybe it can detect jailbreak and do nothing. or even better, detect jail break, use it to detect if there is hooks into the audioRecord interface, if no hooks, record even more with it's new found powers :)

[adtac]

This is straight up malware behaviour.

[Sargos]

Which is why it doesn't do that.

[dest]

It reminds me the amazing Skype protections against reverse engineering

[andai]

Could you remember a little harder?

[zero_iq]

All sorts of anti-debugging tricks, self modifying code, runtime checksums, network traffic obfuscation, etc.

http://www.secdev.org/conf/skype_BHEU06.handout.pdf

http://runtux.com/files/download/skype.4.pdf