Virus-like program that spreads automatically to other computers by sending itself out by email or by any other means. A program that propagates itself by attacking other machines and copying itself to the affected machine.
Worms have self-replicating code that travels from machine to machine by various means. A worms first objective is merely propagation. Worms can be destructive depending on what payload they have been given. Worms may replace files, but do not insert themselves into files.
Comment:
The infection spreads by running a file in circulation on Russian webhosting sites claiming to have a "virtual card" waiting for them - when the file is run, a picture of a heart containing a poem is launched, and the infected user will pass the infection link to their contacts on MSN Messenger with the phrase "olha o que eu fiz pra vc....curti ai...[url removed]"
Immediately after installation, it downloads a file from a Russian domain. Then it opens up a .gif. Then it makes a call back to the before mentioned domain and downloads another file.
It also sends information about your computer to the distributor's e-mail address through an SMTP connection. This includes internal network information such as devices on the network.
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