An Indonesian hacking group claims to have infiltrated hundreds of Australian websites in apparent revenge over reports that Australia is intercepting Indonesian communications.

A group calling itself "Anonymous Indonesia" posted on Twitter a list of more than 100 Australian sites it had hacked, saying the action was in response to reports of spying by Australia.

An image Anonymous Australia uses in a YouTube video explaining why it did the AAPT hack.

The targeted websites, defaced with a message reading "Stop Spying on Indonesia", appear to belong to small business, such as Queensland's Mango Tree Motel and advocacy group the NSW Tenants Union, and seemed to have been chosen at random.