Bot-network detection based on simple mail transfer protocol (SMTP) characteristics of e-mail senders within IP address aggregates

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United States of America Patent

PATENT NO 8438638
APP PUB NO 20110252472A1
SERIAL NO

12756428

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method and system for determining whether an IP address is part of a bot-network are provided. The IP-address-aggregate associated with the IP address of an e-mail sender is determined. The IP-address-aggregate is associated with an IP-address-aggregate-category based on the current SMTP traffic characteristics of the IP-address-aggregate and the known SMTP traffic characteristics of an IP-address-aggregate-category. A bot-likelihood score of the IP-address-aggregate-category is then associated with IP-address-aggregate. IP-address-aggregate-categories can be established based on historical SMTP traffic characteristics of the IP-address-aggregates. The IP-address-aggregates are grouped based on SMTP characteristics, and the IP-address-aggregate-categories are defined based on a selection of IP-address-aggregates with similar SMTP traffic characteristics that are diagnostic of spam bots vs. non-botnet-controllers spammers. Bot likelihood scores are determined for the resulting IP-address-aggregate-categories based on historically known bot IP addresses.

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Patent Owner(s)

Patent OwnerAddress
AT&T INTELLECTUAL PROPERTY I L P754 PEACHTREE STREET NE SUITE 7C ATLANTA GA 30308

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ehrlich, Willa Highland Park, US 6 143
Hoeflin, David Middletown, US 13 228
Liu, Danielle Morganville, US 24 435
Spielman, Chaim Spring Valley, US 17 469
Wood, Stephen K Whitehouse Station, US 5 24

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