W32.Ackantta.F@mm is a mass-mailing worm that spreads through removable drives and sends an email that contains an attachment of itself. It may also download potentially malicious files from the Internet.
Bloodhound.Exploit.257 is a heuristic detection for potentially malicious files that may exploit vulnerabilities in order to perform further malicious actions.
OSX_JAHLAV.B arrives as ActiveXsetup.dmg, which is a MAC OS X mountable Disk Image file. It contains a .PKG file which contains its malicious script and its component files.
Suspicious.Graybird.1 is a detection technology designed to detect entirely new malware threats without traditional signatures. This technology is aimed at detecting malicious software that has been intentionally mutated or morphed by attackers.