Crime sometimes pays

Tuesday, 2 December 2003, 12:39 PM EST

Most spam is simply advertising. However, a small proportion of messages have a malicious purpose, which can range from simple vandalism through to theft and industrial espionage.

For example, a recent virus made infected PCs send messages to addresses in users' address books. Because the text did not form recognisable words, and because the originator of the emails appeared to be valid users, these mails were not filtered by many types of anti-spam engine.

Infected firms found ordinary emails were delayed because outgoing spam was consuming bandwidth. Consequently some users were unable to work normally, and IT staff spent many hours managing queues on overworked mail servers and antivirus gateways. Rather than using a filter, it seems a bandwidth-limiter that stops users from sending more than a few emails each minute is the only way to prevent such mails clogging the internet. But though this type of vandalism has serious consequences, for many firms a risk analysis would probably show the cost of running an anti-spam gateway is higher than the costs of such incidents.

[ Read more ]


New Zeus variant targets users of 150 banks

Posted on 19 December 2014.  |  A new variant of the infamous Zeus banking and information-stealing Trojan has been created to target the users of over 150 different banks and 20 payment systems in 15 countries, including the UK, the US, Russia, Spain and Japan.

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