"SandboxDiff.exe" is flagged like: Artemis!44914B3D2027 (McAfee 5.400.0.1158 AND McAfee-GW-Edition)
It's a FALSE POSITIVE. It's a compiled/packed batch file.
Info: "SandboxDiff" is used to track file/registry changes inside 'Sandboxie' application. Please see: http://sandboxie.com/phpbb/viewtopic.php?t=3606
Attached file "SandboxDiff.zip". Password: infected
Thanks for reporting. It's been added to our whitelist.