Open source repositories tagged with #malware-analysis, ranked by health score.
Program for determining types of files for Windows, Linux and MacOS.
0-day malware detection for binaries, source & scripts (that doesn't suck)
A self-contained PHP webshell scanner that uses token analysis, hash filtering, machine learning, and entropy-based anomaly detection to hunt for backdoors, supports legacy PHP 4.3 to the very recent PHP 8, no dependencies required
MISP (core software) - Open Source Threat Intelligence and Sharing Platform