McAfee > Theat Center > Virus Detail Page

Overview

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• TrojanDropper.Win32.Delf.ab (AVP)

• Win32.TrojanRunner.L (CA Vet)

Characteristics

-- Update Jan 9th 2003 --

A new version of this multidropper package has been received from the field, which drops an email worm W32/Sobig@MM onto the victim machine. The 4242 DATs are required for detection of this version of the multidropper package.

--

This detection is for a trojan multidropper package designed to drop and execute other files on the target machine.

Virus Patrol (a newsgroup scanning application from NAI) retrieved samples of this multidropper package from various newsgroups. The package is likely to be named with a double extension such as '.JPEG.SCR' or '.JPEG.PIF'. When these droppers are executed, two files are dropped:

1. a pornographic JPEG image
2. a KaZaa worm

The dropper merely extracts the two files to the system temporary directory, and executes them.

NB: The actual files dropped may vary - this detection is for the dropper package. As such, observations upon dropper execution may also vary. With many multidroppers, the files to be dropped can be configured using a separate editor application.

Symptoms

The dropper package does not install itself onto the system - it serves only to drop and execute other files. The display of pornographic images is commonly used to mask the droppers activity.

Method of Infection

When the dropper is executed, two files are extracted and run. Typically one may be an image which is displayed to mask the execution of the other malware file.

Removal

All Users:
Use specified engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

Additional Windows ME/XP removal considerations

Variants

Variants

N/A

All Information

Overview -

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• TrojanDropper.Win32.Delf.ab (AVP)

• Win32.TrojanRunner.L (CA Vet)

Characteristics

Characteristics -

-- Update Jan 9th 2003 --

A new version of this multidropper package has been received from the field, which drops an email worm W32/Sobig@MM onto the victim machine. The 4242 DATs are required for detection of this version of the multidropper package.

--

This detection is for a trojan multidropper package designed to drop and execute other files on the target machine.

Virus Patrol (a newsgroup scanning application from NAI) retrieved samples of this multidropper package from various newsgroups. The package is likely to be named with a double extension such as '.JPEG.SCR' or '.JPEG.PIF'. When these droppers are executed, two files are dropped:

1. a pornographic JPEG image
2. a KaZaa worm

The dropper merely extracts the two files to the system temporary directory, and executes them.

NB: The actual files dropped may vary - this detection is for the dropper package. As such, observations upon dropper execution may also vary. With many multidroppers, the files to be dropped can be configured using a separate editor application.

Symptoms

Symptoms -

The dropper package does not install itself onto the system - it serves only to drop and execute other files. The display of pornographic images is commonly used to mask the droppers activity.

Method of Infection

Method of Infection -

When the dropper is executed, two files are extracted and run. Typically one may be an image which is displayed to mask the execution of the other malware file.

Removal -

Removal -

All Users:
Use specified engine and DAT files for detection and removal.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

Additional Windows ME/XP removal considerations

Variants

Variants -

N/A