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IT Security

IPA:IPA/ISEC Reports for Computer Virus for the First-quarter (from January to March2011)

April 14, 2011

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

This is the report on computer virus for the first quarter of 2011 (from January to March), compiled by Information-technology Promotion Agency, Japan (IPA).

1. Number of Cases Reported

The number of cases reported in the first quarter of 2011 (from January to March) was 3,065. The graph below (Figure 1) shows the trend in the quarterly (i.e., three months') figures for the cases reported to IPA.

As shown in Figure 1, the number of cases had once increased to 4,074 in the first quarter of 2010, but it repeated rise and fall, ending up at almost the same level.

Chart 1: Trend in the Number of Cases Reported to IPA

2.Number of Viruses Detected

The virus detection count for the first quarter of 2011 was on the decrease, though W32/Mumu and W32/Autorun showed a temporary increase in the first quarter of 2010 and the third quarter of 2010, respectively.

Chart 2: Trend in the Virus Detection Count

3.Number of Cases Reported, Classified by Computer Viruses

Tough the top three virus types (W32/Netsky, W32/Mydoom and W32/Autorun) showered rise and fall in their report counts, many of others remain at the same level.
To prevent damages caused by viruses, be sure to implement appropriate security measures on a daily basis, including applying security patches, using antivirus software, and handling e-mail attachments with care.

Chart 3: Trend in the Number of Cases Reported, Classified by Computer Virus

Inquiries to:

IT Security Center, Information-technology Promotion Agency, Japan (IPA/ISEC)
Tel:+81-3-5978-7591
Fax:+81-3-5978-7518
E-mail: