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TROJ_DONBOMB.A
Overview

Malware type: Trojan

Aliases: SpamTool.Win32.Delf.h (Kaspersky), Spam-SPM (McAfee), Trojan.Spexta (Symantec), TR/Londrop (Avira), Troj/Spexta-A (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:


Reported infections:

Damage potential:

High

Distribution potential:

Low

Description: 

To get a one glance comprehensive view of the behavior of this worm, refer to the Behavior Diagram shown below.

TROJ_DONBOMB.A Behavior Diagram

Malware Description

This Trojan may arrive on an affected system as an attachment of an email message. Upon execution, it drops and executes a copy of itself in the Windows folder. The dropped file uses any of various predetermined file names. It then modifies the system registry to ensure its automatic execution at every system startup.

This Trojan then checks certain registry keys to obtain valuable information, such as user names and the Simple Mail Transfer Protocol (SMTP) servers used by the affected system.

It arrives via an email that uses the London bombing incident to trick users into opening and executing this Trojan.

The email has the following details:

Subject:
TERROR HITS LONDON

From:
"CNN Newsletter" {breakingnews@cnnonline.com}

Message body:
{A modified HTML copy of the CNN web page regarding the London Bombing}

Attachment:
LondonTerrorMovie.zip

(containing the following file)
London Terror Moovie.avi - multiple spaces
Checked By Norton Antivirus.exe

Below is a screenshot of the email:

TROJ_DONBOMB.A’s sample email

This Trojan also has the capacity to send out unsolicited email messages in bulk.

This Trojan generates email addresses by using certain strings appended with a domain name.

For additional information about this threat, see:
Solution
Technical Details

Description created: Jul. 9, 2005 5:27:10 AM GMT -0800

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