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BitDefender Labs Top 10 Malware Chart for September Reveals a Flatter Curve

October 2007

BUCHAREST, Romania October 5th, 2007 BitDefender, a global provider of award-winning antivirus software and data security solutions, announced today its Top 10 malware threats in September 2007. According to BitDefender Labs, this month's top ten threats make up 64 percent of all malware detected, yet the peer-to-peer worm Puce.G accounts for only 11.1 of total detections, a far cry from when the Sasser or Blaster worms accounted for 60 - 80 percent of a month's malware by themselves.

Notable threats of the month include the Solow worm, a throwback to the ancient days of virus writing, which simply copies itself to every drive that it can find, adding itself as an autorun entry so it gets executed when the disc is first accessed.

Another new entry on Septembers malware list is the Ice.a worm, a complex worm sporting a file-infector component and a downloader which downloads and executes a file from a given URL. Currently, the url seems to have been deactivated.

Finally, the most virulent new threat sits at #3 and spreads by means of creating copies of itself along with autorun.inf files pointing to them in every drive it can find. Once installed, this worm also attempts to disable various kinds of security software and download and run yet another piece of malware. Fortunately, the download location has now been brought offline.

Meanwhile, last month's most important new threat, the Kobcka trojan, seems to have not had as great an impact as feared and failed to make it into Septembers top ten list.

BitDefenders September 2007 Top 10 malware list includes:

1. win32.worm.p2p.puce.g 11.1%
2. worm.rjump.k 10.3%
3. 8.4%
4. win32.netsky.p@mm 6.3%
5. 6.1%
6. win32.worm.rjump.b 5.2%
7. worm.vbs.solow.a 4.8%
8. win32.worm.vb.ymeak.a 4.4%
9. 3.9%
10. worm.rjump.j 3.5%

"Malware writers seem to have found out that discretion is the better part of valor and are striving to produce stealthy custom viruses that will do what's required of them and no more, to avoid early detection by antivirus companies," said Viorel Canja, head of BitDefender Labs.

For further details on the latest malware detected in the wild, please visit BitDefenders Defense Portal site at: