[1][2] Son of a previous king, named Tan-Ruhurater I,[3] Indattu was first the ishakku (governor), of the city of Susa.

Indattu appears to have had a vigorous administration, as seals dedicated to him belong to such officials as judge Kuk-Shimut[5] and scribe Ishmenni.

[1] After the rule of Eparti II, Indattu was acclaimed to the kingship of Shimashki, a city which held hegemony over Susa, the capital of Elam.

For reasons unknown, Gungunum, the king of Larsa, attacked Pashime, a city in Indattu's control, sparking chaos, and causing the beginning of the decline of Shimashki rule over Elam.

[1] It is at about this time that the Shimashki dynasty begins to be gradually replaced by the Sukkalmah in Susa.