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IT Security

IPA:IPA/ISEC Reports for Computer Virus for the First-half (January June2009)

April 13, 2009

IT Security Center
Information-technology Promotion Agency, Japan (IPA)

This is the reports for computer virus compiled by IPA (Information-technology Promotion Agency) for the 1st Quarter of 2009 (January to March).

1. Reported Number

The total reported number for the 1st Quarter of 2009 compiled by IPA was 4,997.  Following graph (Chart 1) shows the shift in quarterly reported number (for every 3 month-total) filed by IPA.  As it shown, the reported number was gradually decreased from the 4th Quarter of 2007 (7,009) to the 1st Quarter of 2008 (5,551); however, the number was shifted almost the same level thereafter.

Chart 1: Shift in Quarterly Reported Number

Chart 1: Shift in Quarterly Reported Number

2. Detection Number of Virus

The detection number of virus also showed decreasing as well as the reported number of virus.  Though W32/Netsky is most frequently reported unchangeably, but the reported number itself was decreased to about a half from its peak period.

In contrary, the detection number of W32/Autorun was drastically increased in the 4th Quarter of 2008.  This virus is the well-known virus which enlarges infection via a USB memory.  The detection number was eventually decreased thereafter; however, the newer viruses including W32/Autorun is likely to rapidly enlarge infection: Accordingly, every user is to continually conduct adequate security measures.

Chart 2: Shift in Detection Number of Virus

Chart 2: Shift in Detection Number of Virus

3.Reported Number Classified by Virus

The reported number for W32/Netsky was still unchangeably many: however, in the 4th Quarter of 2008, the reported number for W32/Autorun which enlarges infection via a USB memory was too, drastically increased.

To prevent damage caused by virus, every user should apply up-to-dated virus patches, leverage anti-virus software and be cautious handling of attachment files to e-mail as well: Besides, be sure to conduct security measures to protect your USB memory to prevent from virus infection.

Chart 3: Shift in Reported Number Classified by Virus

Chart 3: Shift in Reported Number Classified by Virus

Inquiries to:

Information-Technology Promotion Agency, Security Center
Hanamura/Kagaya/Ooura
Tel:+81-3-5978-7527
Fax:+81-3-5978-7518
E-mail: Please feel free to call at +81-3-5978-7517.