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Asian users see adware rise

Bournemouth, UK (5th March 2007) –The top three threats to computer users in February were all new to the top ten according to the latest data from ESET’s ThreatSence.Net, which reports detection statistics from millions of client computers around the world.

In first place is Win32/Nuwar.gen 3.65%, part of the family of worms that has achieved wide propagation since the beginning of the year. Second in the ranking for February is a web-based threat, HTML/TrojanClicker.Agent.A, which reached 3.63% of detections during last month. This threat is a trojan that exploits web browser vulnerabilities to download other malware components. Finally adware, Win32/Adware.Yisou, which has been particularly widespread among Asian users, pops up in third place with 3.14%.

“Although Win32/Adware.Yisou is by no means new, it is very unusual to see such high levels of detection reported,” comments Paul Brook, managing director of ESET UK. “Win32/Adware.Yisou is a keyword-lookup tool that takes over the search feature of IE's address bar and allows users to search using Chinese characters, which might be useful. Unfortunately it also delivers pop-ups and is extremely difficult to uninstall making it very unpopular with non-Chinese literate users that accidentally install it.”

Top 10 Threats for February 2007

1 Win32/Nuwar.gen – 3.65%
2 HTML/TrojanClicker.Agent.A – 3.63%
3 WIN32?Adware.Yisou – 3.14%
4 Win32/Netsky.Q – 1.76%
5 Win32/PSW.QQRob – 1.36%
6 Win32/Adware.Boran – 1.32%
7 Win32/Adware.180Solutions – 1.27%
8 Win32/Rjump.A – 1.18%
9 Win32/TrojanDownloader.Delf.BEN – 1.17%
10 Win32/TrojanProxy.Dlena – 1.09%


For a copy of ESET’s Global Threat Trends – February 2007 please contact Sara Claridge, Marylebone Media Relations, or 0870 766 8482

About ThreatSense.Net

ThreatSense.Net reports detection statistics from millions of client computers around the world and is believed to be the most comprehensive malware reporting system in existence. From an original idea, realised in VIRUS RADAR, ThreatSense.Net, includes data about all types of threats seen attacking user systems, not just those transmitted via email.

The (anonymous) statistical information is collected from NOD32 users who enable the reporting service in the product, and it gives a comprehensive view of the behaviour and spread of malware in the real world. Currently data is collected from more than 10 million systems, and has tracked more than 10,000 different threats and malware families.

About ESET

Founded in 1992, ESET is a global provider of security software for enterprises and consumers. ESET's award-winning, anti-threat software system, NOD32, provides real-time protection from known and unknown viruses, spyware and other malware. NOD32 offers the smallest, fastest and most advanced protection available, with more Virus Bulletin 100% Awards than any other antivirus product ( ESET has been named in Deloitte's Technology Fast 500 four years running, and has an extensive partner network, including corporations such as Canon, Dell and Microsoft.

ESET is headquartered in Bratislava, SK; and is represented worldwide in more than 100 countries. For more information, please visit or call 0845 838 0832.

Media Contact:

Sara Claridge
Marylebone Media Relations
Tel: +44 (0) 870 766 8482
+44 (0) 7968 626838 (mobile)

This press release was distributed by ResponseSource Press Release Wire on behalf of Marylebone Media Relations in the following categories: Consumer Technology, Computing & Telecoms, for more information visit