Wednesday, May 3, 2006

Signs That Your Machine May Be Compromised

Here are some of the signs to look for which may indicate your machine is being compromised.
  • Your web site is being defaced, or have javascript inserted that send users to another site.
  • Your machine is listening on some new or unknown ports.
  • The logs suddenly become much larger than what they usually are.
  • The logs are not logging any thing.
  • Disk space utilization of your machine suddenly increases.
  • Network utilization of your machine suddenly increases.
  • Your machine runs unusually slow.
  • Someone reported that your machine doing some kind of attacks on theirs, or spamming, or hosting copyrighted movies, etc.
  • Google search for "viagra" or other keyword. Result came out positive, but you did not post those pages there.

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