IT Observer - Bagle author releases dangerous assembler code

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Bagle author releases dangerous assembler code
Tuesday, 06 July 2004, 16:08 GMT

Two new Bagle worm variants and the worm's original assembler source code were spreading around the Internet on Sunday - a dangerous development, according to security experts. The author of Bagle started distributing two new variants and the mass-mailing worm's source code on Sunday, which could trigger another summer of misery for Windows users. The Bagle worm first appeared in January as an email attachment and within months there were more than 25 variants. Infected PCs download a Trojan that effectively enlists that computer into the worm author's Zombie army, which can be used to distribute spam and other malware and to launch DDoS attacks.

This weekend saw not only two new versions of the Bagle worm released, but also what appears to be the worm's original source code.

Mikko Hyppönen, director of antivirus research at F-Secure, said he believes the source code is genuine but, worryingly, he said, it is written in pure assembler, which indicates the author responsible is a serious programmer and not a script kiddie.

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