Font Size Change

HOMEIT SecurityIPA:IPA/ISEC Reports for Computer Virus for the 3rd-quarter (from July to September2011)

PRINT PAGE

IT Security

IPA:IPA/ISEC Reports for Computer Virus for the 3rd-quarter (from July to September2011)

October 14, 2011

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

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

1. Number of Cases Reported

The number of cases reported in the third quarter of 2011 (from July to September) was 2,901. 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 reported cases has decreased from the level of the April-June quarter of 2011 (which marked 3,396).

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

2.Number of Viruses Detected

Virus detection count for the July-September quarter of 2011 was about 70,000, down from the level of the April-June quarter of 2011 (with about 90,000) and about half of the April-June quarter of 2010 (with about 130,000). So it is on the significant decrease.

W32/Netsky occupies a large portion but it is also on the decrease. By contrast, the detection count of W32/Mydoom has been increasing since the April-June quarter of 2011, approaching the level of W32/Netsky.

According to the reports filed to IPA, most of the viruses detected were contained in e-mail attachments. So we consider the decreasing trend in e-mail based viruses is attributable to dissemination of security countermeasures against such viruses.

Chart 2: Trend in the Virus Detection Count

3.Number of Cases Reported, Classified by Computer Viruses

As in the past, W32/Netsky marked the highest repot count. But in the July-September quarter of 2011, W32/Netsky took a downward turn while W32/Mydoom took upward trend.
To prevent damages caused by this virus, 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: