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 Length45 Bytes |
Description Added
1991-04-15 Description Modified1991-04-15 |
Malware Proliferation
Characteristics
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
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 :
* 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
Dust
Mini-35
Mini-44
Mini-46
Mini-97
Mini-99