IT Security Center

The yearly reported number of virus for 2007 was 34,334 – significantly decreased from 44,840, the one reported in the previous year (2006) which tending to be decreased from 2005. It can be assumed that the reporting number is getting decreased as such virus which spreads quantity of virus causing major infection has not been existed recently.

Chart 1.1: Yearly Reported Number of Virus

As it showed in the Chart 1.2, the reported number actually infected to a computer was also getting decreased and the reported number for actually damaged was 0.2% against the whole: that was almost the same with the one in the previous year (2006). The fundamental measures, that is, users use anti-virus software to detect potential virus before being infected, is promulgated among user community.

Chart 1.2: Yearly Reported Number of Virus (incl. Ratio of Actual Damage)

 

2. Reported Virus

The gross reported number of virus for 2007 was 166 (2006: 156): of 46 viruses were the initially reported to IPA in 2007 (2006: 29). Though the newly reported viruses were increased in its number, none of virus significantly enlarging infection was realized: the consequences of the worst 3 viruses were almost the same in the previous year.

Of W32/Netsky , W32/Stration and W32/Mytob were the worst 3 viruses in (descending) order among entire viruses reported.

W32/Netsky was initially reported to IPA in February 2004: since the largest number (the worst number) of reports relevant to this virus is reported to IPA consecutive years.

Virus Name	Detected Number	Reported Number
W32/Netsky	5,566,319	7,352
W32/Stration	236,768	1,879
W32/Mytob	234,695	2,662
W32/Nuwar	204,122	583
W32/Sober	159,171	74
W32/Looked	155,860	374
W32/Sality	148,575	2,098
W32/Bagle	105,750	2,960
W32/Mydoom	62,627	2,242
W32/Mywife	43,712	1,713
The other viruses	223,780	12,397
Total	7,141,379	34,334

Note: the reported number above includes the reported number of variants.

 

Chart 2.1: Detection Number of Virus by Month

Chart 2.2: Reported Number of Virus by Month