Virus Profile: Dark Avenger

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 9/1/1989
Date Added: 9/15/1989
Origin: Bulgaria
Length: 1,800 Bytes
Type: Virus
Subtype: File Infector
DAT Required: 4002
Removal Instructions
   
 
 
   

Description

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.

Indication of Infection

The Dark Avenger virus contains the text strings:
"The Dark Avenger, copyright 1988, 1989"
"This file was written in the city of Sofia. Eddie lives.... Somewhere in Time!".

Infected files have a file length increase of 1,800 bytes.

The Dark Avenger virus is destructive. The virus maintains a counter in the disk's boot sector. After each sixteenth file is infected, the virus randomly overwrites a sector on the disk with a portion of the Dark Avenger viral code. If the randomly selected sector is a portion of a file or data file, the file or data file is corrupted. Files and data files which have been corrupted by a sector being overwritten are permanently damaged and cannot be repaired since the original sector is lost.

Methods 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.

Aliases

Amilia, Black Avenger, Boroda, Dark Quest, Diana, Eddie, Evil Men, PS!KO, Rabid Avenger, VANSoft
   

Virus Characteristics

Dark Avenger is a memory resident, file infecting virus. It infects .COM, .EXE, and .OVL files, including COMMAND.COM.

Upon infection, Dark Avenger becomes memory resident. This virus is extremely successful at infecting any executable files that are opened. This includes using the DOS COPY and XCOPY commands to copy uninfected files, both the source and the target files become infected.

Additional Comments:
Dark Avenger was first isolated in the United States at the University of California at Davis. It infects .COM, .EXE, and overlay files, including COMMAND.COM. The virus will install itself into system memory, becoming resident, and is extremely prolific at infecting any executable files that are opened for any reason. This includes using the DOS COPY and XCOPY commands to copy uninfected files, both the source and the target files will end up being infected. Infected files will have their lengths increased by 1,800 bytes. The Dark Avenger virus does perform malicious damage. The virus maintains a counter in the disk's boot sector. After each sixteenth file is infected, the virus will randomly overwrite a sector on the disk with a portion of the Dark Avenger virus code. If the randomly selected sector is a portion of a program or data file, the program or data file will be corrupted. Programs and data files which have been corrupted by a sector being overwritten are permanently damaged and cannot be repaired since the original sector is lost. If you are infected with Dark Avenger, shutdown your computer and reboot from a Write Protected boot diskette for the system, then carefully use a disinfector, following all instructions. Be sure to re-scan the system for infection once you have finished disinfecting it. The Dark Avenger virus contains the words: "The Dark Avenger, copyright 1988, 1989", as well as the message: "This program was written in the city of Sofia. Eddie lives.... Somewhere in Time!". This virus bears no resemblance or similarity to the Jerusalem viruses, even though they are similar in size. Known variant(s) of Dark Avenger are:

   
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.

   

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