Monday, September 17, 2007

A Chinese Malware Downloader in the Wild

This is an example of a recently released in the wild DIY downloader with rather average features such as the ability for the malware author to choose multiple locations of the files to be "dropped", as well as the time interval to check for the newly distributed binaries. The high detection rate of the downloader itself -- Result: 23/32 (71.88%) -- is not the main point I'd like to emphasize on, but rather that compared to the majority of downloaders courtesy of Russian malware authors I come across to occasionally, this is a Chinese one. China is often blamed to be the country hosting the highest percentage of malware in the world, however, China is also the country with highest percentage of infected PCs, and as we've seen with Storm Worm an infected host starts acting as both infection and propagation vector for the malware in question. As in any other local malware market, DIY tools get released so that script kiddies can generate enough noise to keep the more sophisticated malware campaigns running behind the curtains.

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