In the title compound, C(6)H(12)N(4)OS, an intra-molecular N-H⋯N hydrogen-bond is present giving rise to an S(5) ring motif. In the crystal, double-stranded chains propagating along [10[Formula: see text]] are formed via pairs of O-H⋯S and N-H⋯S hydrogen bonds. The chains are further stabilized by C-H⋯S interactions.