Jan
09
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About Win32.Worm.Downadup and its removal
09 January 2009
Win32.Worm.Downadup is, as its name suggests, a worm which spreads by exploiting a vulnerability in the Windows RPC Server Service. Having all Windows systems, except Windows 7 Beta, at its disposal, plus a highly optimized code the e-threat is spreading with incredible speed.
To answer the second question: yes. Upon execution, Win32.Worm.Downadup attempts to download a version of the well known “Antivirus XP” rogue. More information about rogue security software is available here. When we say rogue security software, we automatically imply illegally gotten money, so there is a very plausible reason for a botnet. If Downadup continues to rise at this rate, we could be seeing the birth of a rival to established botnets like Storm.
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The estimated number of infected PCs is at 500.000 and rising. Considering the fact that it first appeared in late November 2008 and that Microsoft issued a patch for this vulnerability on the 23rd October 2008 several questions arise:
1. How come so many systems are still vulnerable to the worm?
2. Is this the beginning of a new botnet?
To answer the first question: it seems people fail to see the importance of system patches, especially the ones rated with a “Critical” status. Several Weeks or even Months can pass before they consider installing them. So how do you solve a security problem that's caused by users that refuse to update their machine? I would like you to ponder on this question and hit me with a reply whenever something comes to mind.
To answer the second question: yes. Upon execution, Win32.Worm.Downadup attempts to download a version of the well known “Antivirus XP” rogue. More information about rogue security software is available here. When we say rogue security software, we automatically imply illegally gotten money, so there is a very plausible reason for a botnet. If Downadup continues to rise at this rate, we could be seeing the birth of a rival to established botnets like Storm.
For a more technical description of Win32.Worm.Downadup please check out this week malware review .
To remove Win32.Worm.Downadup follow these steps:
1. disable System Restore
2. download and install MS08-067 vulnerability patch from here
1. disable System Restore
2. download and install MS08-067 vulnerability patch from here
3. unplug your network cable or disable your network device
4. run the removal tool developed by BitDefender Labs.
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