BApp details: Java Serial Killer
This extension performs Java deserialization attacks using the ysoserial payload generator tool.
See blog post here.
Requires Java version 8.
You can install BApps directly within Burp, via the BApp Store feature in the Burp Extender tool. You can also download them from here, for offline installation into Burp.
Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.