Shutdown

This page shows details and results of our analysis on the malware Shutdown

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.


Minimum DAT

4002 (1998-12-02)

Updated DAT

4362 (2004-05-19)

Minimum Engine

5400.1158

File Length

698 Bytes

Description Added

1995-07-15

Description Modified

1995-07-15

Malware Proliferation

Characteristics

Shutdown is a file infecting virus. It does not become memory resident. It infects .COM files located on the C: drive.

Each time a file infected with the Shutdown virus is executed, this virus infects the first .COM file located in the C: drive \DOS directory.

It is not known what the Shutdown virus does besides replicate.

Additional Comments:
The Shutdown virus was received in July, 1995. Its origin or point of isolation is unknown. Shutdown is a non-resident, direct action infector of .COM files located on the C: drive. When a program infected with the Shutdown virus is executed, this virus will infect the first .COM file located in the C: drive \DOS directory. If this file was previously infected by the virus, the virus will reinfect it. Programs infected with the Shutdown virus will have a file length increase of 698 bytes for each infection of the virus present on the file. The viral code will be located at the beginning of the file. The program's date and time in the DOS disk directory listing will not be altered. The following text strings are visible within the viral code in all infected programs: "Computers must be shutdown to dedicate my sister!" "-- HKs VTech --" "C:\*. C:\DOS\*.COM \*.COM" It is unknown what the Shutdown virus may do besides replicate.

Symptoms

The following text strings are visible within the viral code in all infected files:

"Computers must be shutdown to dedicate my sister!"
"-- HKs VTech --"
"C:\*.C:\DOS\*.COM \*.COM"

Files infected with the Shutdown virus have a file length increase of 698 bytes. The viral code is located at the beginning of the 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:

SCANPM /ADL /CLEAN /ALL

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