A digitally signed installer is a software package that includes a cryptographic signature from the publisher. Operating systems and security tools can verify that the file came from the claimed vendor and has not been altered since it was signed. This makes signatures useful for checking integrity and origin, especially for remote-access tools and other software that users download from the internet.
In cyber security, the signature does not guarantee that the download path was trustworthy or that the site offering the file was legitimate. Attackers can abuse this by pairing a genuine, signed installer with a fake login or download page, so the binary itself looks safe while credentials are stolen elsewhere in the flow. Defenders should treat signatures as one trust signal, not the whole decision. Safer practice includes using official download portals, validating hashes, enforcing application allowlisting, and requiring phishing-resistant MFA for access tied to the installer.