2021 — Libmklccgdll

Use Dependency Walker or dumpbin /exports libmklccg.dll to inspect the symbols.

In three independent incident reports (2024–2025), libmklccgdll 2021.dll was found in: libmklccgdll 2021

In each case, the file was not digitally signed by Intel Corporation and had high antivirus detection rates (12–30+ engines on VirusTotal). Use Dependency Walker or dumpbin /exports libmklccg

libmklccgdll is an Intel Math Kernel Library (MKL) component that provides a DLL for the Conjugate Gradient (CG) solver and related iterative linear-algebra routines, packaged for use on Windows platforms. Below is a concise overview, common uses, and troubleshooting tips relevant to 2021-era setups. In each case, the file was not digitally

Cause: Mixing Intel OpenMP (libiomp5md.dll) and GNU OpenMP (libgomp-1.dll).
Fix: Use only one threading runtime. For libmkl_gnu_thread, link against -lgomp and do not load libiomp5md.dll.