LCSASS.EXE - Dangerous

What you should do about LCSASS.EXE:

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Your PC may be infected. The presence of a file called LCSASS.EXE is a possible sign of infection.


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What we know about LCSASS.EXE:

The filename LCSASS.EXE was first seen on Mar 16 2008 in The UNITED KINGDOM. It has also been seen in the following geographical regions of the Prevx community:

  • JAPAN on Apr 29 2008
  • The UNITED STATES on Mar 19 2008
The filename LCSASS.EXE refers to many versions of an executable program.

The most common file size is 70,299 bytes. But the following file sizes have also been seen:

  • 80,896 bytes
  • 80,027 bytes

The unsafe files using this name are associated with the malware group WORM.VARIANT!WORM.

 These files have no vendor, product or version information specified in the file header.

LCSASS.EXE has been seen to perform the following behavior(s):

  • The Process is packed and/or encrypted using a software packing process
  • The Process is polymorphic and can change its structure
  • Adds a Registry Key (RUN) to auto start Programs on system start up
  • Executes a Process
  • This Process Creates Other Processes On Disk
  • Writes to another Process's Virtual Memory (Process Hijacking)
  • Uses DNS to retrieve the IP address for web sites

LCSASS.EXE has been the subject of the following behavior(s):

  • Added as a Registry auto start to load Program on Boot up
  • Created as a process on disk
  • Executed as a Process
  • Deleted as a process from disk
  • Has code inserted into its Virtual Memory space by other programs
  • Copied to multiple locations on the system

LCSASS.EXE can also use the following file names:

  • 3[1].EXE
  • 3[2].EXE
  • 97581869.EXE
  • LUID.EXE
  • 50757743.SVD
  • DPTRMWLBRV-910.PMS.EXE