MSBlaster worm spreading rapidly
By John Leyden
Posted: 12/08/2003 at 09:17 GMT
A worm that exploits a critical Remote Procedure Call (RPC) flaw to infect vulnerable Windows machines is spreading rapidly across the Internet this morning.
Although serious, the effects of the MSBlaster worm are expected to be less than that caused by the infamous Nimda worm.
The MSBlaster worm, also known as Lovsan, Blaster or Poza and which began spreading yesterday, is programmed launch an attack against windowsupdate.com on 16 August.
Microsoft last month issued a patch to guard against the problem but uptake has been predictably slow, allowing malicious code writers to come up with software that is having a severe effect on many users.
Mac, Linux and Unix computers are immune to this Microsoft-specific vulnerability.
According to a preliminary analysis of the worm by F-Secure, the worm spreads in a 6176 byte executable named MSBLAST.EXE to Windows 2000 and Windows XP systems unless recent Windows security patches have been applied. Windows NT 4 and Windows 2003 might also be affected but these systems appear to be playing a lesser role in the spread of the worm.
The worm launches a command shell and uses TFTP to connect to other infected systems to download the worm's executable. MSBlaster will scan addresses in the Internet to locate vulnerable Windows machines using TCP/TDP port 135. Once found, it will copy itself over and modify the system so the worm will be executed every time the machine is started. The worm will keep on replicating from every infected machine.
Unsuccessful propagation attempts may crash vulnerable computers, or render them unstable. Successful worm outbreaks are causing localised network latency.
Try Symantec
http://securityresponse.symantec .com/avcenter/venc/data/w32.blas ter.worm.removal.tool.html
Microsoft
Download for Windows 2000 from www.microsoft.com:
http://www.f-secure.com/dl-w2k/
Download for Windows XP from www.microsoft.com:
http://www.f-secure.com/dl-wxp/
however, the removal tool doesn't work. got problem. but as long as u dun log on net u wun hv to reboot. if u wanna log on net. click on control alt delete then go processes. look for msblast. disable it, then go internet.. tts to bypass the reboot thingy