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Paper Abstract and Keywords
Presentation 2009-07-17 17:00
[Special Talk] Understanding the large-scale spamming botnet
Tatsuya Mori (NTT), Holly Esquivel, Aditya Akella (UW-Madison), Akihiro Shimoda, Shigeki Goto (Waseda Univ.) IA2009-31
Abstract (in Japanese) (See Japanese page) 
(in English) On November 11, 2008, the primary web hosting company, McColo, for the
command and control servers of Srizbi botnet was shutdown by its
upstream ISPs.
Subsequent reports claimed that the volume of spam dropped
significantly everywhere on that very same day.
In this work, we aim to understand the world's worst spamming botnet,
Srizbi, and to study the effectiveness of targeting the botnet's
command and control servers, i.e., McColo shutdown, from the viewpoint
of Internet edge sites.
%We also aim to understand how Srizbi has grown and evolved
%through the analysis of long-term data set.
We conduct an extensive measurement study that consists of e-mail
delivery logs and packet traces collected at four vantage
The total measurement period spans from July 2007 to April 2009,
which includes the day of McColo shutdown.
We employ passive TCP fingerprinting on the collected packet traces to
identify Srizbi bots and spam messages sent from them.

The main contributions of this work are summarized as follows.
We first estimate the global scale of Srizbi botnet in a probabilistic
Next, we quantify the volume of spam sent from Srizbi and the
effectiveness of the McColo shutdown from an edge site perspective.
Finally, we reveal several findings that are useful in understanding
the growth and evolution of spamming botnets. We detail the rise and
steady growth of Srizbi botnet, as well as, the version transition of
Srizbi after the McColo shutdown.
Keyword (in Japanese) (See Japanese page) 
(in English) / / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 137, IA2009-31, pp. 53-58, July 2009.
Paper # IA2009-31 
Date of Issue 2009-07-10 (IA) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IA2009-31

Conference Information
Committee IA  
Conference Date 2009-07-17 - 2009-07-17 
Place (in Japanese) (See Japanese page) 
Place (in English) IIJ Kanda Jinbocho Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Internet Operation and Management, etc. 
Paper Information
Registration To IA 
Conference Code 2009-07-IA 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Understanding the large-scale spamming botnet 
Sub Title (in English)  
1st Author's Name Tatsuya Mori  
1st Author's Affiliation Nippon Telegraph & Telephone Corporation (NTT)
2nd Author's Name Holly Esquivel  
2nd Author's Affiliation University of Wisconsin - Madison (UW-Madison)
3rd Author's Name Aditya Akella  
3rd Author's Affiliation University of Wisconsin - Madison (UW-Madison)
4th Author's Name Akihiro Shimoda  
4th Author's Affiliation Waseda University (Waseda Univ.)
5th Author's Name Shigeki Goto  
5th Author's Affiliation Waseda University (Waseda Univ.)
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Date Time 2009-07-17 17:00:00 
Presentation Time 30 
Registration for IA 
Paper # IEICE-IA2009-31 
Volume (vol) IEICE-109 
Number (no) no.137 
Page pp.53-58 
#Pages IEICE-6 
Date of Issue IEICE-IA-2009-07-10 

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