That is 4157.rar にはDLKeyが設定されています
COMMENT[DLKey]
DATE21/10/11(Mon),02:10:27
SIZE11.6MB (12196652bytes)
ORGMIMEapplication/octet-stream
ORGNAMEBeing a Kashi Boy 1.rar
DLKey:

That's ローダーに戻る