Symantec Internet Security Threat Report -

Professional Security Resources: Symantec Internet Security Threat Report (3/4)

Author: Max : 2007/3/24

Symantec Internet Security Threat Report

Malicious Code Trends Highlights

Of the top ten new malicious code families detected in the last six months of 2006, five were Trojans, four were worms, and one was a virus.
The most widely reported new malicious code family this period was that of the Stration worm.
Symantec honeypot computers captured a total of 136 previously unseen malicious code threats between July 1 and December 31, 2006.

During this period, 8,258 new Win32 variants were reported to Symantec, an increase of 22 percent over the first half of 2006.
Worms made up 52 percent of the volume of malicious code threats, down from 75 percent in the previous period.
The volume of Trojans in the top 50 malicious code samples reported to Symantec increased from 23 percent to 45 percent.
Trojans accounted for 60 percent of the top 50 malicious code samples when measured by potential infections.
Polymorphic threats accounted for three percent of the volume of top 50 malicious code reports this period, up from one percent in the two previous periods.
Bots made up only 14 percent of the volume of the top 50 malicious code reports.
Threats to confidential information made up 66 percent of the top 50 malicious code reported to Symantec.
Keystroke logging threats made up 79 percent of confidential information threats by volume of reports, up from 57 percent in the first half of the year and 66 percent in the second half of 2005.
Seventy-eight percent of malicious code that propagated did so over SMTP, making it the most commonly used propagation mechanism.
Malicious code using peer-to-peer to propagate rose from 23 percent of all propagating malicious code in the first six months of 2006 to 29 percent in the last half of the year.
The majority of malicious code reports during this period originated in the United States.
During the second half of 2006, 23 percent of the 1,318 documented malicious code instances exploitedvulnerabilities.
MSN Messenger was affected by 35 percent of new instant messaging threats in the second half of the year.

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