The author of κακά

I am the one who once fashioned the light and made the darkness

the one who presently makes peace and creates calamity

I the Lord God am the one who does all these things

ἐγὼ ὁ κατασκευάσας φῶς καὶ ποιήσας σκότος

ὁ ποιῶν εἰρήνην καὶ κτίζων κακά

ἐγὼ κύριος ὁ θεὸς ὁ ποιῶν ταῦτα πάντα

-- Isaiah 45:7 (LXX)

 

but he that doeth evil hath not seen God

 

ὁ δὲ κακοποιῶν οὐχ ἑώρακεν τὸν θεόν

-- III John 1:11

Isaiah's God is the creator of everything, including evil

I form the light,
and create darkness:
I make peace,
and create evil:
I the LORD do all these things.

-- Isaiah 45:7 (KJV)