Invoke-PSImage
Encodes a PowerShell script in the pixels of a PNG file
...The tool offers options for compression and encryption so the embedded content is both smaller and protected by a passphrase when required. It includes helpers to encode a payload into an image, decode an embedded payload back to readable form, and run the extracted content directly from memory to avoid touching disk. Designed as a compact, single-file PowerShell script, it relies on .NET imaging APIs to manipulate pixel data or metadata and to store the payload in a way that survives ordinary file transfers.