Klez Continues Its Reign as King of Malice!

Symantec Lists Top Viruses for April 2003

Worm/Klez.E and Worm/Yaha.E Reach Five Straight Months Of Leadership, New Worm Disguises Itself As U.S. Spy Satellite Pictures

May 7, 2003 - Symantec Security Response released its monthly listings of the top viruses and vulnerabilities reported in April 2003. The table below represents the most prevalent viruses for March and April 2003.

April 2003March 2003
W32.Klez.H@mmW32.Klez.H@mm
W95.Hybris.wormBackdoor.Dvldr
W32.HLLP.HandyHTML.Redlof.A
Backdoor.SdbotW95.Hybris.worm
W32.Kwbot.C.WormW95.Spaces.1445
W32.PinfiW32.FunLove.4099
W32.Bugbear@mmW32.Nimda.E@mm
W32.Gibe.B@mmW32.HLLW.Deloder
W32.Sobig.A@mmW32.Bugbear@mm
W32.Opaserv.WormW32.HLLP.Handy

Symantec also identified the top five vulnerabilities as:

  1. Oracle Net Services Link Buffer Overflow Vulnerability
  2. Sendmail Address Prescan Memory Corruption Vulnerability
  3. Microsoft Windows SMB NTLM Authentication Interception Weakness
  4. Snort TCP Packet Reassembly Integer Overflow Vulnerability
  5. Samba 'call_trans2open' Remote Buffer Overflow Vulnerability