Suspicious DLL Load Concentration from User-Writable Paths

Ankit Mehta@Secvyn

•updated Jun 25, 2026•0•0•3

This rule detects potential memory-resident malware or staging activity by identifying instances where a high volume of DLL, OCX, or SYS files are loaded from user-writable directories (Temp, AppData, Users) on a specific device within a one-hour window. A threshold of 5 or more unique image loads from these locations is flagged as potentially suspicious, as it may indicate an attacker loading multiple malicious components or modules.