Archive for August, 2009

The Internet After Dark (Part 2)

August 30, 2009 by Craig Labovitz

This blog completes our informal three week study of Internet daily traffic patterns. Using data from the Internet Observatory, we analyzed weekday application traffic across 110 geographically diverse ISPs, including some of the largest carriers in North American and Europe. We believe this report (and upcoming paper) represent the largest study of [...]

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The Internet After Dark (Part 1)

August 24, 2009 by Craig Labovitz

After dark when the dinner dishes are put away and the kids are safely tucked into bed, the Internet subtly changes. Starting in the twilight of early evening, business traffic slows to a crawl, previously dormant applications flicker on home computer screens, and like clockwork, Internet activity begins its nightly climb towards a regular [...]

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July 2009 Malicious Links: 14 Hotspots

August 20, 2009 by Jose Nazario

Inspired by a friend’s question of which CIDRs to block first, I went looking into our malicious URL database for July, 2009, data and dug for the top IPs and netblocks. This was pretty easy: what URLs did the malware we analyze go to, what were the IP addresses associated, and then process that list [...]

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What Europeans do at Night

August 17, 2009 by Craig Labovitz

The New York Times recently had an interesting piece on the changing daily Internet usage patterns in the US. The basic gist of the article was Americans are using the Internet more than in the past and starting to twitter / surf / email much earlier in the day.
Which made us wonder if Europeans are [...]

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Twitter-based Botnet Command Channel

August 13, 2009 by Jose Nazario

UPDATED TO ADD STATS AND JAIKU PROFILE AND A TUMBLR PROFILE
While digging around I found a botnet that uses Twitter as its command and control structure. Basically what it does is use the status messages to send out new links to contact, then these contain new commands or executables to download and run. It’s an [...]

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