Delf.h

Threat description

Details

Summary

This remotely controlled trojan appeared on July 8th, 2005, just after terrorists attacked London. It was spead with an HTML-based e-mail that contained news about explosions.

Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

The trojan is a PE executable file 82432 bytes long, packed with UPX file compressor.

The trojan was spread in e-mail messages that looked like that:

The trojan was sent in that e-mail as a ZIPped attachment named 'LondonTerrorMovie.zip'. The trojan's file name inside the archive was:

 London Terror Movie.avi      Checked By Norton Antivirus.exe  

When the trojan's file is run, it copies itself to Windows folder with one of the following names:

 London Terror Movie.avi


Checked By Norton Antivirus.exe

The trojan sets read-only, hidden and system attributes to the copied file. Then the trojan adds a startup key value for its file to the Registry:

 [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]  " manager" = "%WinDir%\.exe"   

OR

 [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]  " manager" = "%WinDir%\.exe"   

where %WinDir% stands for Windows directory name and <filename> stands for the trojan's file name, for example:

 London Terror Movie.avi


Checked By Norton Antivirus.exe

OR

 London Terror Movie.avi


Checked By Norton Antivirus.exe

The trojan is used by spammers to send e-mails from infected computers. The trojan can be remotely controlled to send e-mail and to upgrade its file from Internet.

When sending spam e-mails, the trojan can generate fake sender's e-mail addresses automatically using the following string arrays:

 London Terror Movie.avi


Checked By Norton Antivirus.exe

The trojan uses the following fake mailer tags:

 London Terror Movie.avi


Checked By Norton Antivirus.exe
Detection

F-Secure Anti-Virus detects this trojan with the following updates:

Detection Type: PC

Database: 2005-07-11_01

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More Info