Virus Database

Macro.Office.Teocatl

Description Macro.Office.Teocatl

This macro-virus infects Office97 Word documents and Excel sheets. It was named after its internal location: "teonanacatl". It is the second known macro-virus (after "Access/Word97.Cross") that is able to infect several MS Office applications.
The code of the virus is placed in one module named StrangeDays and contains eight functions:
AutoClose - Word auto-function, contains infection routine
AutoOpen - Word auto-function, disables VisualBasic code editor (stealth)
AutoExit - Word auto-function, calls AutoClose to infect document
ToolsMacro - disables macros viewing (stealth)
ToolsOptions - disables macros viewing (stealth)
FileTemplates - disables macros viewing (stealth)
ViewVBCode - disables macros viewing (stealth)
Auto_Open - Excel auto-function, hooks sheet activating routine

The virus spreads its code under the "native" application (Word->Word, Excel->Excel), as well as drops infected files to another application (Word->Excel and Excel->Word). In both infected Word documents and Excel sheets, the virus has the same Basic code. It is written in such an accurate way that is able to be executed with no errors under both Word and Excel from Office97.
To infect "native" objects (documents or sheets), the virus uses Import/Export VisualBasic functions: the virus exports its Basic code to the C:LO.SYS file, and then imports it into non-infected documents (under Word) and sheets (Excel). In the case of Word, to infect other documents, the virus intercepts the auto-functions AutoClose and AutoExit and infects documents that are closed or upon exiting Word. In the case of Excel, the virus hooks the sheet-activation routine, the auto-function Auto_Open does that when an infected sheet is opened.
To infect another application, the virus uses a trick with the auto-loading ability of Word and Excel to load templates (Word) and sheets (Excel) from the start-up directory. To infect Word from Excel, the virus creates new NORMAL.DOT (Word) and PERSONAL.XLS (Excel) files in the start-up directory.
Both of these NORMAL.DOT and PERSONAL.XLS contain just a small 17-line routine that is not the virus itself, but the virus loader. This loader has an auto-name (Auto_Close in Excel and AutoExec in Word), and is executed by the system, when Word starts, with an infected NORMAL.DOT, or Excel closes, with an infected PERSONAL.XLS. In both cases, the loader reads (imports) the complete virus code from the C:LO.SYS file to the current object (NORMAL template or PERSONAL.XLS) and as a result, infects it. The loader then saves the infected result to the original file (NORMAL.DOT or PERSONAL.XLS) and exits. On next loading, both Word and Excel will load their NORMAL.DOT and PERSONAL.XLS with the complete virus code inside, and as a result, the virus will continue its propagation.
The virus has stealth and anti-warning abilities: it disables the Tools/Macro, Tools/Options, File/Templates and View/VBCode menu items as well as turns off VisualBasicEditor and VirusProtection. It also changes VirusProtection instructions in the system registry.
On the 26th of any month, it displays a MessageBox and deletes all files in the current directory, and the text in the MessageBox is as follows:
Strange Days by Reptile/29A
Strange days have found us
Strange days have tracked us down
They're going to destroyall

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Macro.Word97.Marker-based

Description Macro.Word97.Marker-based

This is a family of Word 97 macro-viruses. They infect the macros area (Normal template) globally upon opening an infected document. Other documents are infected upon closing. Some virus versions also infect documents upon their opening. While infecting, the viruses append their code to the existing macro-code, if there is any macro. In the case that there are no macro(s), the viruses just copy their code to the document or the template.
They were named for the text comments in their bodies, and this comment is used by the virus to locate the top of the code in an infected file. There are several variants of this text, depending on the virus version:
<- this is a marker!
<- this is another marker!
The viruses of this family run a log of infected computers: each time while infecting a new computer, the viruses add their code text comments with the date of infection and user address (as it is stored in Windows).
The viruses of this family indicate themselves in different manners. "Marker.a" in July starting from 23rd displays the messages:
Did You Wish Shankar on his Birthday ?
Thank You! I Love You. You are wonderfull.
You are Heart Less. You Will Be Punished For This
"Marker.c" and some other variants connect to a ftp site and send their log files there.
Marker.ay
When MS Word opens a document, the infection procedure checks and infects this document. It removes all macros from the document and copies viruse from the global macros area.
This virus also unloads all loaded templates and add-ins and deletes all files in the Word startup directory. It also changes the Word user's information:
UserName = "JonMMx 2000"
UserInitials = "MeMeX"
UserAddress = "JonMMx2000@yahoo.com"
Upon the first infection of a computer and also on 1st of any month, the virus creates, in the Windows system, a directory file "Jon.html" and sets this file as desktop wallpaper. The file contains the text:
a Poet For My Dear Love

Dear Iin

To the very best that happen in mylife
Long ago and in my mind, I can see your face lonely and lost in time
You were gone since yester month But the memories, never would dissapear
I think of you, I THINK OF YOU.
Yes it's true I can pretend. But the paint of blue, keep beat me till the end.
Yes it's hard to understand. Why you leaving me and all we dreaming on
Dear Iin, I close my eyes and see your face. That's all I have to do to be with you.
Dear Iin, altough I can not touch your face. I know what I can do to be with you
Long ago so faraway. But the light of blue, still living with me today.
You were gone since yester month. But the memories never would dissapear.
Speed Hari

Macro.Word97.MDMA

Description Macro.Word97.MDMA

This virus contains only one macro: AutoClose. It infects the system on closing an infected file, it writes itself to documents that are also closed. Under Macintosh after 4th of any month the virus wipes out the files on disk.

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