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.
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Minimum DAT
4002 (1998-12-02) Updated DAT4002 (1998-12-02) |
Minimum Engine
5.1.00 File Length615 Bytes |
Description Added
1993-03-15 Description Modified1993-03-15 |
Malware Proliferation
Characteristics
Each time a file infected with the TechnoRat virus is executed, this virus infects all of the .COM files in the current directory, and the directory directly above the current directory.
It is not known what TechnoRat does besides replicate.
Additional Comments:
The TechnoRat, or Rat-615, virus was submitted in March, 1993. It
appears to be from the USSR. TechnoRat is a non-resident, direct
action infector of .COM programs, including COMMAND.COM.
When a program infected with the TechnoRat virus is executed, this
virus will infect all of the .COM programs located in the current
directory, and the directory directly above the current directory.
Infected programs will have a file length increase of 615 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 not appear to be
altered, however the seconds field will have been set to "62". The
following text strings are visible within the TechnoRat viral code
in all infected files:
"Techno-Rat I. Copyright by Lord Blaise, Odessa 1991."
"???????????"
"COM"
"????????COM"
"*.* *.COM ..\*.COM"
It is unknown what TechnoRat may do besides replicate.
Symptoms
"Techno-Rat I.Copyright by Lord Blaise, Odessa 1991."
"???????????"
"COM"
"????????COM"
"*.* *.COM ..\*.COM"
Infected files have a file length increase of 615 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 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 :
* 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