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DownloadCheck is an application that checks for Trojan horse applications in your Downloads folder. It was written in response to the MP3Concept Trojan horse release of April 2004. See John Gruber's excellent commentary on this Trojan and the controversy/hype that it generated.

It's likely that you'll never find a MP3 or other document type masquerading as an application. Most transport mechanisms on the Internet will not preserve the resource fork of the file being downloaded. Without the resource fork, the MP3Concept Trojan, and others like it, will not work. more...


Mac OS X 10.3 or later

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Anonymous Member IconReview

I'll give you an A for good intentions, but "an application disguised as a document" is just brushing the surface of potential trojans, and one that is as you note very difficult to actually get into a user's system. And, alas, the trojan itself would most likely show up in something like an internet-enabled disk image and never show up in the download folder.

Don't run programs from untrusted sources, don't automatically launch ANY file recieved from untrusted sources, disable all the "helpful" automatic unpacking and launching you can, and open documents by dragging and dropping them into the application icon that's expecting that type.

Because all these attacks are, at the heart, a con. Social engineering. Be aware, and you won't be socially engineered. Not twice, anyway. :)

Reply2 replies
Version 1.0
Anonymous Member Icon


ChiefTypist (Developer)

A small correction: internet enabled disk image will show up eventually as a folder in the user's download folder (after the items are copied from the disk image.) Since DownloadCheck looks in subfolders, it should pick it up.

The main problem, as you note, is the stupidity of people. If DownloadCheck flags applications in the folder, maybe it will make people think twice about opening them.


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Current Version (1.x)


Downloads 9,002
Version Downloads 5,069
Type Utilities / Virus
License Free
Date 13 May 2004
Platform OS X / PPC 32
Price Free
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