It’s an anti-malware definition update… either of Windows Defender or MSE (which should NOT be running alongside Avast)

https://www.virustotal.com/en/file/519db35bf163cc888702234dcbcd7e68c24200f1e986a2f629005cf46ccff32e/analysis/1387665632/

Mcafee finds it suspicious but since the rest of the vendors don’t I suppose it’s their false positive.