McAfee > Theat Center > Virus Detail Page

Overview

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.

Aliases

• Birdie

Characteristics

DoDo is a memory resident, file infecting virus. It infects .COM files, including COMMAND.COM. It is not related to the Dodo 2456 virus.

Upon infection, the DoDo virus becomes memory resident in video card memory. Interrupt 21 is directly hooked by the virus in the interrupt area.

Once the DoDo virus is memory resident, it infects .COM files as they are executed.

Additional Comments:
The DoDo, or Birdie, virus was received in February, 1992. Its origin and point of isolation are unknown. DoDo is a resident resident infector of .COM programs, including COMMAND.COM. It is not related to the Dodo 2456 virus. The first time a program infected with the DoDo virus is executed, the DoDo virus will install itself memory resident in video card memory. Interrupt 21 will be directly hooked by the virus in the interrupt area. After the DoDo virus is memory resident, it will infect .COM programs when they are executed. Infected programs will have a file length increase of 408 bytes with the virus being located at the end of the infected file. The program's date and time in the DOS disk directory listing will not be altered. One text string can be found in the viral code in infected programs: "Birdie Hop!" DoDo doesn't do anything besides replicate. Known variant(s) of DoDo are:

Symptoms

One text string is found in the viral code in infected files:

"Birdie Hop!"

Infected files have a file length increase of 408 bytes. The virus is located at the end of the infected file. The file's date and time in the DOS disk directory listing are not altered.

Method of Infection

The only way to infect a computer with a file infecting virus is to execute an infected file on the computer. The infected file may come from a multitude of sources including: floppy diskettes, downloads through an online service, network, etc. Once the infected file is executed, the virus may activate.

Removal

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants

• Pig
• Pig-B

All Information

Overview -

This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.

Aliases

• Birdie

Characteristics

Characteristics -

DoDo is a memory resident, file infecting virus. It infects .COM files, including COMMAND.COM. It is not related to the Dodo 2456 virus.

Upon infection, the DoDo virus becomes memory resident in video card memory. Interrupt 21 is directly hooked by the virus in the interrupt area.

Once the DoDo virus is memory resident, it infects .COM files as they are executed.

Additional Comments:
The DoDo, or Birdie, virus was received in February, 1992. Its origin and point of isolation are unknown. DoDo is a resident resident infector of .COM programs, including COMMAND.COM. It is not related to the Dodo 2456 virus. The first time a program infected with the DoDo virus is executed, the DoDo virus will install itself memory resident in video card memory. Interrupt 21 will be directly hooked by the virus in the interrupt area. After the DoDo virus is memory resident, it will infect .COM programs when they are executed. Infected programs will have a file length increase of 408 bytes with the virus being located at the end of the infected file. The program's date and time in the DOS disk directory listing will not be altered. One text string can be found in the viral code in infected programs: "Birdie Hop!" DoDo doesn't do anything besides replicate. Known variant(s) of DoDo are:

Symptoms

Symptoms -

One text string is found in the viral code in infected files:

"Birdie Hop!"

Infected files have a file length increase of 408 bytes. The virus is located at the end of the infected file. The file's date and time in the DOS disk directory listing are not altered.

Method of Infection

Method of Infection -

The only way to infect a computer with a file infecting virus is to execute an infected file on the computer. The infected file may come from a multitude of sources including: floppy diskettes, downloads through an online service, network, etc. Once the infected file is executed, the virus may activate.

Removal -

Removal -

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants -

• Pig
• Pig-B