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Lineage.LKJ

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Lineage.LKJ
Technical name:W32/Lineage.LKJ.drp
Threat level:Medium
Type:Worm
Effects:   It spreads and affects other computers. It searches for and steals passwords saved for certain Windows services. It generates a large amount of network traffic activity with the consequent consumption of bandwidth. It uses stealth techniques to avoid being detected by the user. It spreads , across the Internet, via mapped drives, through shared network resources, by infecting files that are then distributed.
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95; IIS

First detected on:April 16, 2010
Detection updated on:April 16, 2010
StatisticsNo

Brief Description 

    

Lineage.LKJ is a worm that spreads by copying itself, without infecting other files.

 

It captures certain information entered or saved by the user, with the corresponding threat to privacy: passwords saved by certain Windows services.

 

  • In the local network: it generates a large amount of network activity and consumes bandwidth.

 

It uses stealth techniques to avoid being detected by the user:

  • It uses techniques included in its code to hide itself while it is active.
  • It injects itself in running processes.
  • It deletes the original file from which it was run once it is installed on the computer.
  • It modifies system permissions in order to hide itself.

 

Lineage.LKJ uses the following propagation or distribution methods:

  • Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
  • Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.
  • Computer networks (shared resources): it creates copies of itself in shared network resources to which it has access.
  • File infection: it infects different types of files, which are then distributed through any of the usual means: floppy disks, email messages with attachments, Internet download, files transferred via FTP, IRC channels, P2P file sharing networks, etc.

 

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