```
rule ShellJSP {
strings:
$s1 = "decrypt(fpath)"
$s2 = "decrypt(fcontext)"
$s3 = "decrypt(commandEnc)"
$s4 = "upload failed!"
$s5 = "aes.encrypt(allStr)"
$s6 = "newid"
condition:
filesize < 50KB and 4 of them
}
```