In a first phase, "the framework agreement lays the groundwork for establishing a transitional civilian authority," said the Forces for Freedom and Change, noting that other civilian groups also signed.
Monday's deal was signed by al-Burhan, paramilitary commander Mohamed Hamdan Dagalo and multiple civilian groups, most notably the Forces for Freedom and Change -- the main civilian faction that was ousted in the coup.
The deal -- based on a proposal by the Sudanese Bar Association -- was negotiated in the presence of officials from the United Nations, Western diplomats as well as Saudi Arabia and the United Arab Emirates, according to the FFC.
The signing was attended by UN special representative Volker Perthes and AU ambassador Mohamed Belaish.
Phase one of the deal "is a very low level commitment on al-Burhan's part... allowing him to survive" politically, said Kholood Khair founder of the Confluence Advisory, a Khartoum-based think-tank.
But the signatories will likely face "a real political crisis as they start talking in earnest about security sector reforms, transitional justice (and) financial accountability," she added.
Monday's signing comes months after al-Burhan pledged that the military would step aside and make way for factions to agree on a civilian government.
Pro-democracy activists reject the latest effort and are calling for new street protests demanding the military return to barracks.
The United States and allies on Monday welcomed the signing. .
A joint statement issued by the US State Department said the United States, Norway, Saudi Arabia, the United Arab Emirates and Britain "welcome the agreement of an initial political framework."
This report was sourced from data provided by Reuters and Agence France-Presse.