Backdoor:W32/Bugbear.K

Classification

Malware

Backdoor

W32

Backdoor:W32/Bugbear.K, Email-Worm.Win32.Tanatos.k, Email-Worm:W32/Bugbear.K

Summary

A remote administration tool (RAT) that bypasses the security features of a program, computer or network to give unauthorized access or control to its user.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Note

After disinfection it is recommended to change all log-in credentials, as they could have been compromised by the password stealer component of the worm. It is also recommended to check infected systems and networks for possible hacker intrusion that could have been performed through the backdoor component of the worm.

More details about the removing procedure you can find in our support center: http://www.f-secure.com/support/technical/av5/support-issue-2002100200.htm

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

Backdoor:W32/Bugbear.K (also known as Tanatos) is an email and network worm that also has a backdoor component. This particular variant is very similar to the original Tanatos worm that was found in 2002.

Propagation

This Tanatos worm variant spreads in email messages with the following characteristics:

Subjects:

  • !!! WARNING !!!
  • ;)
  • [Fwd: look] ;-)
  • Announcement
  • bad news
  • empty account
  • fantastic
  • Friendly
  • Fwd:
  • good news!
  • Greetings!
  • Greets!
  • Hello!
  • Hi!
  • history screen
  • hmm.."
  • I cannot forget you!
  • I love you!
  • I need photo!!!
  • Interesting...
  • Introduction
  • Is that your password?
  • Just a reminder
  • look
  • Lost & Found
  • Love
  • Me nude
  • New Contests
  • new reading
  • News
  • Old photos
  • Payment notices
  • photo
  • photos
  • Please Help...
  • Re:
  • Report
  • Sex pictures
  • sexy
  • Stats
  • Today Only
  • update
  • various
  • Warning!
  • wow!
  • You are fat!
  • Your Gift

Body text:

  • Pease open an attachment to see the message.
  • Please see Attachment
  • please,read the attach file.
  • see attachment
  • See the attached file
  • See the attached file for more info
  • Take a look to the attachment

Attachment names:

  • a000032.jpg [lots of spaces] .scr
  • girls.jpg [lots of spaces] .scr
  • image.jpg [lots of spaces] .scr
  • love.jpg [lots of spaces] .scr
  • message.txt [lots of spaces] .scr
  • music.mp3 [lots of spaces] .scr
  • myphoto.jpg [lots of spaces] .scr
  • news.doc [lots of spaces] .scr
  • photo.jpg [lots of spaces] .scr
  • pic.jpg [lots of spaces] .scr
  • readme.txt [lots of spaces] .scr
  • song.wav [lots of spaces] .scr
  • video.avi [lots of spaces] .scr
  • you.jpg [lots of spaces] .scr