A audio message purporting to come from an Islamic State spokesperson has threatened an attack on Australia during the holy month of Ramadan.

The message, believed to come from spokesman Abi al-Hassan al-Muhajer, was released on Monday and called on IS followers to 'charge against the rejectionists and the apostates'.

The United States, Europe, Russia, Iraq, Syria and The Philippines were also named by Al-Muhajer.

A audio message purporting to come from an Islamic State spokesperson has threatened an attack on Australia during the holy month of Ramadan. Eid al-Fitr prayer at the Lakemba Mosque in 2016 is pictured

The message, believed to come from spokesman Abi al-Hassan al-Muhajer, was released on Monday (stock image)

Ramadan began late last month and ends on Saturday, June 24.

'O lions of Mosul, Raqqa, and Tal Afar, God bless those pure arms and bright faces, charge against the rejectionists and the apostates and fight them with the strength of one man,' al-Muhajer said.

'To the brethren of faith and belief in Europe, America, Russia, Australia, and others.

'Your brothers in your land have done well so take them as role models and do as they have done'.

Rejectionist is a derogatory term used to refer to Shi'ite Muslims.

Ramadan began late last month and ends on Saturday, June 24. Lakemba Mosque during Ramadan in 2016 is pictured

The United States, Europe, Russia, Iraq, Syria and The Philippines were also named by Al-Muhajer (stock image)

The authenticity of the recording was not independently verified, but the voice was the same as a previous audio message purported to be from al-Muhajer.

Ramadan is the ninth month in the Islamic calendar and is four weeks of fasting and prayer.

After Ramadan, the three-day 'festival of breaking the fast,' known as Eid al-Fitr begins at the official sighting of a crescent moon.

Ramadan is an official holiday in all Muslim countries.