TriBack Loader Triad Persistence via Startup Folder - Signed Binary Co-located with Encrypted Companion

Duo Tech@duotech

•updated Jul 28, 2026•1•0•3

Fires only when the TriBack Loader signed host binary (avk.exe/hostfxr.dll) and its expected encrypted companion .dat file are both dropped into the same Windows Startup folder location and within a 5-minute window of each other, rather than alerting on either filename alone. This reduces false positives from legitimate G DATA AVK installs or unrelated MSI packages that could coincidentally drop matching filenames without the paired companion artifact.