The Prestige of Malware: Unmasking ClickFix, Destructor Hijacking, and the “Dictionary Symphony”

A detailed reverse-engineering breakdown of a ClickFix (FakeUpdates) infection chain delivering Lumma Stealer. The chain uses a weaponized MSI installer, DLL search order hijacking via a modified mfc100.dll, and a novel 'Destructor Hijacking' technique that redirects a C++ vtable destructor to avoid DllMain-based EDR detection. The payload is protected by a two-layer 'Dictionary Symphony' decode routine combining a custom Base64 alphabet with a rolling XOR keyed to a 28KB dictionary file. The post explains why MFA doesn't prevent session theft, provides Python skeleton code for decryption, YARA rules for detection, and MITRE ATT&CK mappings for defenders.