Microsoft Defender claims Trojan:Script/Wacatac.B!ml on installation file

What do you want to achieve?

Install SquareLine Studio 1.4

What have you tried so far?

Download and tried to install. The file is quarantined by Defender and claims about the trojan Trojan:Script/Wacatac.B!ml

Screenshot or video


Windows 11

  • SquareLine Studio version:
  • Operating system:
  • Target hardware:

Many users use the exact same SquareLine Studio 1.4 zip-file and we don’t have a single complaint yet about viruses in it. From this we conclude that you might have some setting differences in Defender on your PC that might need retuning. Reading/googling a bit about this Vacatac.B!ml seems to reveal it’s really an existing trojan virus but Defender tends to give false alarms about it sometimes. Even Microsoft seems advising using some other scanners that could confirm/deprove if this is a false positive.