The naming -2- suggests this is the second version of a previous challenge ( JustInsertTheStuff.zip ), likely with added obfuscation or a different hiding technique. First, basic file inspection:
file JustInsertTheStuff\ -2-.zip Zip archive data, at least v2.0 to extract JustInsertTheStuff -2-.zip
zsteg data.bin May reveal hidden text in LSB: b1,rgb,lsb,xy → flag partially. The naming -2- suggests this is the second