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Fortinet
announces the top 10 most reported high-risk threats for October 2007. By
definition, mass mailers use emails to spread, and therefore can easily end up
in any individual's inbox. Most current mass mailers are multi-functional and
can serve as gateways to expose private data or allow remote control of the
system.
Fortinet® announced the top 10 most reported high-risk
threats for October 2007. The report, compiled from all FortiGateTM multi-threat
security systems in production worldwide, is a service of Fortinet's FortiGuard
Global Security Research Team.
October 2007's top 10
threats, as determined by the degree of prevalence are:
|
Rank
|
Threat Name
|
Threat Type
|
% of Detections
|
|
1
|
HTML/Iframe_CID!exploit
|
Exploit
|
7.83
|
|
2
|
W32/Netsky!similar
|
Mass mailer
|
6.07
|
|
3
|
Adware/CashOn
|
Spyware
|
6.01
|
|
4
|
W32/Netsky.P@mm
|
Mass mailer
|
5.54
|
|
5
|
HTML/Clicker.AC!tr
|
Trojan
|
4.58
|
|
6
|
W32/ANI07.A!exploit
|
Exploit
|
4.30
|
|
7
|
HTML/Obscured!exploit
|
Exploit
|
3.88
|
|
8
|
W32/Bagle.DY@mm
|
Mass mailer
|
3.78
|
|
9
|
W32/Grew.A!worm
|
Worm
|
2.99
|
|
10
|
W32/MyTob.CJ@mm
|
Mass mailer
|
2.74
|
Two new threats joined the top ten list for the first time:
the mass mailer MyTob.CJ (also known as MyDoom) reached the 10th position, up
from last month's 65th spot; the Trojan Clicker.AC entered in fifth position,
doubling its activity compared to last month with high spikes observed towards
the end of October. Netsky.P is still very active with the combination of
Netsky.P and Netsky!similar (inclusive of Netsky.P detection) representing the
highest volume detected this month with 11.61 percent of the overall reported
activity. CashOn dropped from the top position last month to the third position
this month. However, the adware toolbar plug-in remained prevalent with, once
again, 99.70 percent of its activity focused in Korea.
Even though Fortinet threat researchers reported a general
decrease in activity for mass mailing during the first half of the year, four
mass mailers were ranked in the top ten this month, showing that this type of
malware still accounts for a large portion of high-risk threats. In fact, in
comparison to last month, the accumulated volume of Netsky.P, which includes
Netsky!similar, has increased by 17.03 percent, while Bagle.DY showed a 13.46
percent surge in activity this month.
But the most noticeable trend was the unprecedented activity volume of
the MyTob.CJ variant, which was more than eight times greater than what was
observed in September. MyTob.CJ ended October with a spike of activity and
surpassed Bagle.DY for most of the month.
By definition, mass mailers use emails to spread, and
therefore can easily end up in any individual's inbox. Most current mass
mailers are multi-functional and can serve as gateways to expose private data
or allow remote control of the system. As a result, they still represent a real
threat for end users.
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