Fileless Loader Hardcoded IE8 User-Agent

Duo Tech@duotech

•updated Jun 9, 2026•0•0•6

Detects HTTP requests utilizing a specific, highly verbose, and legacy Internet Explorer 8 User-Agent string. This exact hardcoded string is utilized by a fileless .NET loader (originating from a malspam campaign) to download subsequent payload stages from its staging server.