Some older browsers knew a little about JavaScript but couldn’t handle image effects. This line checks to see if the JavaScript code can detect any images on the page.

The first image (before rollover) has been given the name button1.This code says that the chgImg function is called by both the onMouseover and onMouseout event handlers, both of which pass ...

Seemingly harmless SVGs are packed with malicious JavaScript for a phishing redirect to actor-controlled URLs.

Once opened in a browser, the code decrypts a secondary payload using a static XOR key and then redirects the user to an attacker-controlled site via the window.location.href function. These URLs ...

The authors turned to polyglot images to add the JavaScript code that redirects to a page offering a fake reward. The malicious code is hidden in a BMP type of picture and it is heavily obfuscated.

Hiding Executable Javascript In Images That Pass Validation. 18 Comments . by: Mike ... Not only does it carry the complete code but both image and the Javascript are seen as valid.

As soon as you create the Image object, and set it's source, the browser starts to download. This is done asyncronously. That is, the x.src = "foo.gif" setting, doesn't halt the browser, until the ...