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

• Storm

Characteristics

Stor.-1163 is a memory resident, file infecting virus. It infects .COM files, including COMMAND.COM.

Upon infection, this virus becomes memory resident as a low system memory Terminate-and-Stay Resident (TSR) of 1,424 bytes. Interrupt 21 is hooked.

Once memory resident, it infects .COM files, as they are executed.

It is not known what Storm-1163 does besides replicate.

Additional Comments:
The Storm-1163 virus was submitted in June, 1993. Its origin or point of isolation is unknown. Storm-1163 is a memory resident infector of .COM programs, including COMMAND.COM. When the first Storm-1163 infected program is executed, this virus will install itself memory resident as a low system memory TSR of 1,424 bytes, hooking interrupt 21. Once the Storm-1163 virus is memory resident, it will infect .COM programs, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 1,163 bytes with the virus being located at the end of the file. The program's date and time in the DOS disk directory listing will appear to be unaltered, however, the non-displayed seconds field will have been set to 62. One text string is visible within the Storm-1163 viral code within infected programs: "COM" It is unknown what Storm-1163 does besides replicate. Known variant(s) of Storm-1163 are:

Symptoms

One text string is visible within the Storm.1163 viral code within infected files:

"COM"

Infected files have a file length increase of 1,163 bytes. The virus is located at the end of the file. The file's date and time in the DOS disk directory listing are altered, the non-displayed seconds field is set to 62.

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

• Storm.1172
• Storm.1217
• Storm.1153

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

• Storm

Characteristics

Characteristics -

Stor.-1163 is a memory resident, file infecting virus. It infects .COM files, including COMMAND.COM.

Upon infection, this virus becomes memory resident as a low system memory Terminate-and-Stay Resident (TSR) of 1,424 bytes. Interrupt 21 is hooked.

Once memory resident, it infects .COM files, as they are executed.

It is not known what Storm-1163 does besides replicate.

Additional Comments:
The Storm-1163 virus was submitted in June, 1993. Its origin or point of isolation is unknown. Storm-1163 is a memory resident infector of .COM programs, including COMMAND.COM. When the first Storm-1163 infected program is executed, this virus will install itself memory resident as a low system memory TSR of 1,424 bytes, hooking interrupt 21. Once the Storm-1163 virus is memory resident, it will infect .COM programs, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 1,163 bytes with the virus being located at the end of the file. The program's date and time in the DOS disk directory listing will appear to be unaltered, however, the non-displayed seconds field will have been set to 62. One text string is visible within the Storm-1163 viral code within infected programs: "COM" It is unknown what Storm-1163 does besides replicate. Known variant(s) of Storm-1163 are:

Symptoms

Symptoms -

One text string is visible within the Storm.1163 viral code within infected files:

"COM"

Infected files have a file length increase of 1,163 bytes. The virus is located at the end of the file. The file's date and time in the DOS disk directory listing are altered, the non-displayed seconds field is set to 62.

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 -

• Storm.1172
• Storm.1217
• Storm.1153