NIST IR 7298
NIST SP 800-113
Payload - Consists of the information passed down from the previous layer.
NIST SP 800-38C
NIST SP 800-83
Payload - The portion of a virus that contains the code for the virus's objective, which may range from the relatively benign (e.g., annoying people, stating personal opinions) to the highly malicious (e.g., forwarding personal information to others, wiping out systems).