Yusufali-A is a new Trojan worm for Windows which is a bit unusual. Yusufali-A pops up a verse from the Koran whenever the infected machine Web surfs to a site with offensive content. Yusufali-A also blocks the offensive content from view by minimizing the browser window at the same time as it pops up the Yusufali verse.

Yusufali-A apparently determines whether a site is “offensive” by comparing the words in the title of the page against its own list of offensive words, and if it finds one of the words it pops up its Yusufali verse.

The Koran verse it displays is partly in Arabic, and also includes some verse in English, which says “Yusufali: Know, therefore, that there is no god but Allah, and ask forgiveness for they fault, and for the men and women who believe: for Allah knows how ye move about and how ye dwell in your homes.”

If the offending Web page is not closed, eventually Yusufali-A traps the mouse…

[Continue reading Yusufali-A Trojan Worm Censors Adult Surfing with Koran Verses]