msitools

msitools is a collection of programs designed for working with Windows Installer (.msi) files, enabling users to inspect, build, compare, dump, and extract their contents. This is particularly useful in cybersecurity for analyzing malware packaged in MSI format, reverse engineering installers, or extracting embedded files during forensic investigations.

The suite includes msiinfo for displaying package information, msibuild for constructing MSI packages, msidiff for comparing two packages, msidump for dumping tables and streams, and msiextract for pulling out contained files. Additionally, wixl offers MSI creation from XML documents, similar to the WiX toolset.

These tools rely on the libmsi library, which supports reading, writing, and querying MSI databases. They are valuable in penetration testing, malware analysis, and software reverse engineering contexts where understanding installer behavior is key.

msitools leverages the libmsi library to parse and manipulate the internal structure of .msi files, which are CAB-based archives containing databases (in IDT text format) and binary streams. Tools query SQL-like databases within MSIs, dump tables as text, extract streams to files, compare contents via diff algorithms, and build packages by importing tables or adding streams. Operations overwrite existing data and support GObject introspection for integration.