Top 10 most dangerous malicious codes in December 2006

Sophos has announced the list of Top 10 most malicious and distributed malware in December 2006. Accordingly, although it has just appeared, the "Happy New Year" worm has knocked out two "seniors", Stration and Netsky, to take the lead in the rankings.

Sophos names the malicious stream of malicious code through these malicious emails, the "Dref" line. However, each security firm has a different way of naming this worm line. Symantec called them Mixor.q while Kaspersky Lab named it Tibs.

Sophos statistics show a surprising return of the Dref worm track. It has just reappeared in a few days but this deep lineage has quickly climbed to the top of the rankings of the most dangerous types of malicious code and caused many problems for the computer system on a global scale. .

Although the new variant Dref-V was discovered on December 30, 2006 under the guise of a new year greeting card, it accounted for 97.3% of the total number of malicious emails sent globally in the following days.

As a result, the Dref pushed one of Stration's most dangerous spam streams down to fourth place and Netsky sempai to second place.

Statistics for the whole December show that Dref accounts for more than 1/3 (35.2%) of the total number of malicious emails sent on the Internet in the month. Netsky accepted second place with 22.2%, Mytob third with 10.7%. Stration fell to fourth place with 7.8% while the figure of this deep line in November was 33.3%.

" It was only true in the last two days of December but the Dref caused a big shock when it climbed to the top of our Top 10 list ," said Carole Theriault - Sophos' security consultant.

" Dref has spread strongly worldwide in just a few days. We are concerned that the speed of spreading and infecting this worm will be stronger in the coming days when people will return to work. normal work after holidays .

Attack tricks of the Dref are not a new trick. But just appearing for two days has climbed to the top of the table, showing that the past few days businesses and users have been too open , "Theriault said.

The rate of malicious emails in the past month is still low, Sophos said. The December rate was 0.30% or the same rate as every 337 outgoing emails that contained an email containing malicious code.

Top 10 most dangerous viruses in December :

Location

Malware name

Ratio %

first

Dref

35.2%

2

Netsky

22.2%

3

Mytob

10.7%

4

Stratio

7.8%

5

Bagle

5.2%

6

Zafi

4.8%

7

MyDoom

3.3%

8

Sality

2.8%

9

Nyxem

1.3%

ten

StraDl

0.9%

Others

5.8%

Hoang Dung