Dasher.b

Dasher.b is an Internet worm that spreads to vulnerable remote PCs running the Microsoft Windows operating computer with unpatched security flaws. The infection process doesn't require any user interaction. Once installed, Dasher.b runs a spreading routine. It searches for vulnerable remote PCs and infects them. Then the worm opens a back door that provides the attacker with unauthorized remote access to a compromised PC. The intruder can download from a predefined FTP server and execute arbitrary files.