"This group today indicates a readiness, a will and a unified position to support Sudan, its government and people," Larijani said at a news conference following the talks.
He said nations who support al-Bashir's prosecution "miscalculated" by thinking they "can sit and issue orders to have others behave as they wish".
"This has changed," Larijani said. "They have to play with a new chessboard.""
Meanwhile, the leader of Sudan's semi-autonomous southern region urged Khartoum on Saturday to reverse its decision to expel humanitarian groups from the country.
The Khartoum government shut down 13 foreign and local aid agencies after accusing them of passing information to war crimes prosecutors.
The groups have denied the accusations.
Yien Matthew, a spokesman for the Sudan People's Liberation Movement (SPLM), said the expulsion could have a "catastrophic" impact on tens of thousand of displaced Darfuris.
The United Nations has said thousands of lives have been put at risk by the decision to expel the aid groups. It warned that more than a million people could be left without food, water or healthcare.
The UN's main human rights office had said earlier on Friday it would examine whether Sudan's decision to expel the groups constitutes a breach of basic human rights and possibly a war crime, a spokesman said.
But the UN Security Council failed on Friday to agree on a response to Sudan's decision to expel the groups.
Western diplomats said the 15-member council had agreed to express its "concern", but was unable to agree to a joint statement.