Exploit:JS/Mult.AG is a detection for malicious shellcode that attempts to exploit certain vulnerabilities in order to download and run arbitrary files. The shellcode is obfuscated.
Some files detected as Exploit:JS/Mult.AG may arrive in the system when a user browses certain sites using a vulnerable version of Internet Explorer. When a webpage that includes Exploit:JS/Mult.AG is loaded, the shellcode is executed in the system.
This is the case for files detected as Exploit:JS/Mult.AG that may be associated with a vulnerability in Internet Explorer as discussed in Microsoft Security Advisory (961051)
. Users are advised to refer to these resources for more information.