Some claimed that there was a crucifxiion of a prophet in Zoroastrianism that got betrayed by a character, similar to the name of Judas.
However, the early Avestan sources (all likely composed before 300 BCE) are silent on the topic of Zarathustra’s death. It is not until we come to Syrian sources in Late Antiquity (Pseudo-Clementine Homilies 9.4, Recognitions 4.27-29; cf. John Malalas) where we encounter the tradition that Zoroaster was consumed by fire or lightning from heaven. In later Pahlavi writings appear the datum that Zarathustra died in old age at 77 (some 35 years after he began teaching) as well as the claim that he died at the hands of a karb assassin named Brādrēs or Brātrōrēs (Zand i Vohuman Yasn 3.3; Dadestan i Denig 72.8; Denkard 5.2.3; Pahlavi Rivayat in Dadestan i Denig 36.6, 47.23; Selections of Zadspram 9.0–10.20, 12.1–10). See Abraham Jackson’s Zoroaster: The Prophet of Ancient Iran (Macmillan, 1899) for a dated but thorough discussion of these texts. Note that this latter tradition does not posit crucifixion (which would have been anachronistic for the life of Zarathustra), nor that he was “betrayed” by a confidant like Judas since Brātrōrēs (whose name is nothing like Judas) was portrayed as a daivic priest from the Tūrānians who opposed Zarathustra, in the context of chief Arǰāsp’s second war against Vištāspa. For a critical analysis of this martyr legend, see Mary Boyce’s Zoroastrianism: Its Antiquity and Constant Vigour (Mazda Publishers, 1992), pp. 14-16, who concludes that “the story of Zoroaster’s death by violence thus proves quite worthless and late, the product of scholastic ponderings upon a misinterpreted passage of the ‘national’ epic”.