LSASS.EXE - Dangerous

What you should do about LSASS.EXE:

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What we know about LSASS.EXE:

The filename LSASS.EXE was first seen on May 22 2007 in The UNITED STATES. It has also been seen in the following geographical regions of the Prevx community:

  • MALAYSIA on Aug 21 2007
  • The EUROPEAN UNION on Jul 10 2007
  • CANADA on Jul 10 2007
  • The UNITED KINGDOM on May 22 2007
  • PHILIPPINES on Sep 24 2007
  • SPAIN on May 5 2008
The filename LSASS.EXE is used by multiple object types including executable programs,objects.

The most common file size is 107,520 bytes. But the following file sizes have also been seen:

  • 56,832 bytes
  • 43,072 bytes
  • 81,920 bytes
  • 278,619 bytes
  • 77,824 bytes
  • 101,896 bytes

The unsafe files using this name are associated with the malware group Backdoor.IRCBot.gen.Some files using the name LSASS.EXE are also associated with the malware groups:
  • TROJAN.AGENT.GEN
  • Backdoor.Trojan
  • BackDoor.Generic5.NIM
  • Trojan.SystemPoser
  • Worm.Brontok.Gen
  • Trojan.System32.Hijacker
 These files have no vendor, product or version information specified in the file header.

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

  • The Process is packed and/or encrypted using a software packing process
  • Executes a Process
  • Registers a Dynamic Link Library File
  • This Process Deletes Other Processes From Disk
  • This Process Creates Other Processes On Disk
  • Modifies Windows Security Policies to restrict/expand User Privlidges on the machine
  • Disables the Built in Windows System Restore Feature
  • Disables the built in Windows File Protection System
  • Can communicate with other computer systems using HTTP protocols
  • Adds a Link in the Start Menu
  • Changes the Internet Explorer Home Page Settings
  • Disables Access to the Task Manager built into Windows
  • Disables Access to the Windows Registry Editior
  • Modifies Windows Initialization And System Settings Used On Start up
  • Changes to the file command map within the registry
  • Adds a Registry Key (RUN) to auto start Programs on system start up
  • Modifies the Windows Host File which could be used to stop you visiting specific web sites by redirecting you to alternative addresses without you knowing
  • Terminates Processes
  • Changes Windows Firewall Control Settings to allow itself to communicate with other computers
  • Writes to another Process's Virtual Memory (Process Hijacking)
  • Creates a new Background Service on the machine
  • Looks at the contents of the autoexec.bat file
  • Reads email address and phone book details
  • Uses DNS to retrieve the IP address for web sites
  • Adds Products to the system registry
  • Executes Processes stored in Temporary Folders
  • Downloads hidden code from covert web sites
  • Downloads program file(s) from the web
  • This Process is a file infector which modifies program files to include a host a copy of the infection
  • Enables an In Process Object/Server - Common with DLL Injections
  • Visits web sites without the user knowing
  • The process hooks code into all running processes which could allow it to take control of the system or record keyboard input, mouse activity and screen contents
  • Deletes Links in the Start Menu
  • Creates potentially fake system tray messages and error warnings
  • Opens pop up browser windows

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

  • Executed as a Process
  • Created as a process on disk
  • Executed by Internet Explorer
  • Deleted as a process from disk
  • Added as a Link in the Start Menu
  • Executed from Temporary Folders
  • Has code inserted into its Virtual Memory space by other programs
  • Terminated as a Process
  • Added as a Registry auto start to load Program on Boot up
  • Registered as a Dynamic Link Library File
  • Copied to multiple locations on the system
  • Created as a new Background Service on the machine
  • Deleted as a Link in the Start Menu

LSASS.EXE can also use the following file names:

  • YAM-WIN.EXE
  • YAMIPOD.EXE
  • WINAUDIT.EXE
  • WHOISTD.EXE
  • WHOISTHISDOMAIN.EXE
  • TREEPAD.EXE
  • TREEPAD LITE.EXE
  • STARTUPLIST.EXE
  • SMSNIFF.EXE
  • SMARTSNIFF.EXE
  • ROCKXP.EXE
  • FTPSERVER3LITE.EXE
  • QUICK `N EASY FTP SERVER LITE.EXE
  • QM-2_2.EXE
  • QM - THE QUICK MAILER.EXE
  • OMZIFF.EXE
  • HTTP FILE SERVER (HFS).EXE
  • FTPWANDERER2.EXE
  • FOLLOWMEIP LITE.EXE
  • DRIVE MANAGER.EXE
  • CPICTURE LE.EXE
  • CC260.EXE
  • COUNTRY CODES.EXE
  • CONVERT.EXE
  • ANGRY IP SCANNER.EXE
  • PRG.EXE
  • A43 FILE MANAGEMENT UTILITY.EXE
  • 19 HANDY PROGRAMS TO PUT ON A USB STICK.EXE
  • X.EXE
  • KEYGEN ALL PRODUCTS.EXE
  • A.I.O. - KEYGEN ALL PRODUCTS`.EXE
  • A.I.O. - TINY HANDY TOOLS V3.0 - 12IN1`.EXE
  • WORM2007[1].EXE
  • EXPLORE.EXE
  • SVCHOST32.EXE
  • NEW FOLDER.EXE
  • MSCONFIG.EXE
  • DD2.EXE
  • 08723653.EXE
  • WORM2007.EXE
  • BOOT.EXE
  • WORM2007[2].EXE
  • 32140189.EXE
  • WORM2007_2.EXE
  • 15376885.BAK
  • AUTORUN.PIF
  • DPTRRISMEV-73.PMS.EXE
  • 8AB043FA69A50A71598079EB210AE381.PIF
  • ARPA.EXE
  • 65770769.SVD
  • DPTRMIYABI-470.PMS.EXE
  • BCF69ADBB161BAD334D7236548311DE9.EXE
  • SMSS.EXE
  • J6100022.EXE
  • C_10002K.COM
  • SV711204230R.EXE
  • O4100027.EXE
  • _DEFAULT10002.PIF
  • YESBRON.COM
  • RELEASE.EXE
  • TEMPPE.EXE
  • DEBUG.EXE
  • OBJ.EXE
  • MY PROJECT.EXE
  • FILE.EXE
  • WAWA.EXE
  • ESTONACTOC, HAROLD M.EXE
  • C++.EXE
  • BIN.EXE
  • SALARY.EXE
  • 3-VARIABLES_FILES.EXE
  • 4-DECISIONS_FILES.EXE
  • COMPROHAND.EXE
  • HAROLD ESTONACTOC.EXE
  • RESOURCES.EXE
  • WINDOWSAPPLICATION9.EXE
  • VB.NET`.EXE
  • RONEL2.EXE
  • COMSYS.EXE
  • TEMP.EXE
  • BACKUP.EXE
  • _UPGRADEREPORT_FILES.EXE
  • ESTONACTOC, HAROLD.EXE
  • DPTRNILALL-233.PMS.EXE
  • D68100C9695EB88052D8606A5AC00BE1.EXE
  • D68100C9695EB88052D8606A5AC00BE1.PIF
  • PAGEFILE.PIF
  • ~.EXE
  • 037589.LOG
  • 111626.LOG
  • 92972278.SVD