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

• Mini

• Minimal

• Short-45

• Trivial

Characteristics

Mini-45 is an overwriting, file infecting virus. It does not become memory resident. It infects .COM files, including COMMAND.COM.

Each time a file infected with Mini-45 is executed, the virus infects all .COM files in the current directory.

Additional Comments:
The Mini-45 virus was received in April, 1991. It is originally from Bulgaria. This virus is a non-resident, overwriting virus which infects .COM files, including COMMAND.COM. When a program infected with Mini-45 is executed, the virus will infect all .COM programs in the current directory by overwriting the first 45 bytes of the program with the viral code. No file size increase will be noticed, unless the original program was less than 45 bytes in length, in which case it will now be 45 bytes in length. The .COM programs' date and time in the disk directory will be updated to the current system date and time of infection. All .COM programs infected with Mini-45 will fail to function properly after infection. These programs will be permanently damaged since the first 45 bytes are lost. Known variant(s) of Mini-45 are:

Symptoms

The virus infects all .COM files in the current directory by overwriting the first 45 bytes of the file. There is no file size increase, unless the original file was less than 45 bytes in length, in which case it becomes 45 bytes in length. The .COM files' date and time in the disk directory is updated to the current system date and time of infection.

All .COM files infected with Mini-45 fail to function properly after infection. These files are permanently damaged since the first 45 bytes are lost.

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

• Dust
• Mini-35
• Mini-44
• Mini-46
• Mini-97
• Mini-99

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

• Mini

• Minimal

• Short-45

• Trivial

Characteristics

Characteristics -

Mini-45 is an overwriting, file infecting virus. It does not become memory resident. It infects .COM files, including COMMAND.COM.

Each time a file infected with Mini-45 is executed, the virus infects all .COM files in the current directory.

Additional Comments:
The Mini-45 virus was received in April, 1991. It is originally from Bulgaria. This virus is a non-resident, overwriting virus which infects .COM files, including COMMAND.COM. When a program infected with Mini-45 is executed, the virus will infect all .COM programs in the current directory by overwriting the first 45 bytes of the program with the viral code. No file size increase will be noticed, unless the original program was less than 45 bytes in length, in which case it will now be 45 bytes in length. The .COM programs' date and time in the disk directory will be updated to the current system date and time of infection. All .COM programs infected with Mini-45 will fail to function properly after infection. These programs will be permanently damaged since the first 45 bytes are lost. Known variant(s) of Mini-45 are:

Symptoms

Symptoms -

The virus infects all .COM files in the current directory by overwriting the first 45 bytes of the file. There is no file size increase, unless the original file was less than 45 bytes in length, in which case it becomes 45 bytes in length. The .COM files' date and time in the disk directory is updated to the current system date and time of infection.

All .COM files infected with Mini-45 fail to function properly after infection. These files are permanently damaged since the first 45 bytes are lost.

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 -

• Dust
• Mini-35
• Mini-44
• Mini-46
• Mini-97
• Mini-99