I once got my own program falsely detected as virus while developing it. It was such a bizarre experience: you press "Run" in the Visual Studio, it apparently b

I once got my own program falsely detected as virus while developing it. It was such a bizarre experience: you press "Run" in the Visual Studio, it apparently builds successfully but then it can't run because the executable does not exist. Huh? Anyhow, it turned out that apparently my hand-coded base64-decoder was sufficiently similar to a base64-decoder used in some trojan out there (which was apparently built with the same version of MSVC): removing/sufficiently rewriting my decode_base64 function made the detection go away reliably. So yeah, I believe now that those virus signatures are quite arbitrary in nature.