OXLOADER CRT Init Hijack via .ocx Drop and VirtualAlloc Decryption Stubs

Ibrahim Saud@tektrix

•updated Jun 24, 2026•0•0•5

This rule detects the OXLOADER malware's technique of hijacking the CRT initializer table. It identifies an unsigned process loading a randomly named .ocx file (a copy of dui70.dll with an injected .xtext section) from a temporary or download path. The detection is further refined by correlating this with multiple VirtualAlloc calls, consistent with the malware's three rolling-XOR decryption stubs activated via the RegisterClipboardFormatW CRT initializer hook.