Current evidence indicates that this data originated from Checkmarx's GitHub repositories, and that access to those repositories was facilitated through the initial supply chain attack of March 23, 2023.
The WAV file is a valid audio file. It passes MIME-type checks. But the audio frame data contains a base64-encoded payload. Decode the frames, take the first 8 bytes as the XOR key, XOR the rest, and you have your executable or Python script.
CanisterWorm, as Aikido has named the malware, targets organizations' CI/CD pipelines used for rapid development and deployment of software. Every developer or CI pipeline that installs this package and has an npm token accessible becomes an unwitting propagation vector.
