Just tested the current package on Jotti,
details here, but "0/18 scanners reported malware". Quite unusual, actually :icon_mrgreen:
Similar for VirusTotal (
results) - the Baidu AV reported "WisdomEyes", whatever that is, but 60 others say it's clean.
The Forum is on a safe server, and the MasmBasic package gets built with an automated procedure. There is no chance of a trojan creeping in. But many AV produce false positives - we even have a dedicated sub-forum
AV Software sh*t list 
Assembler produces by its nature suspicious code: The virus scanners expect C/C++ initialisation routines, CRT, SEH, etc; if they don't find them, they shout foul. Sometimes they shout foul because they see a pushad ... popad sequence, which is very unusual in C code, so it's "suspicious". Everything that is non-standard looks dangerous to them. Well, we are all proud here to produce non-standard software, so evidently there is a certain tension between assembler programmers and the AV brigade. And to be honest, there is also a community of assembler programmers who do produce malware, but we usually smell them from a distance if they appear here and ask for advice. The forum rules are very strict, and for valid reasons.
If you cannot ignore or override the message, try if there is an option to exclude certain folders, e.g. \Masm32\, from the scan. In the last
five ten years or so, we had
one case of a virus introduced here in this forum by a young member (who apparently had an infected machine without knowing it), and it was spotted by experienced members, not by their antivirus software...