file .a in \tmpdirectory.
Sorin Victor Dudea BitDefender Virus Researcher
This is an Internet worm that attacks Apache servers running under FreeBSD platforms. It uses the Apache HTTP Server chunk encoding stack overflow vulnerability to upload itself and run under those operating systems.
After its first execution the worm starts scanning for Apache servers running under FreeBSD OS and if it finds any it uses the above vulnerability to upload and execute itself. For every web page it finds, it will download them and search for e-mail addresses in its html pages. When it finishes searching it will send spam emails to those addresses using a public SMTP server.