Class Virus
Platform MSWord

Technical Details

This is a stealth macro-virus. It contains eighteen procedures in one module
“xSebelas”: xSebelasInit, AntiMakro, DisplayPath4, Mcopy, ShowForm, FileOpen,
AutoOpen, ViewVBCode, AutoExec, AutoExit, ToolsMacro, FileTemplates,
FormatStyle, ReFresh, AutoClose, FileExit, ToolsOptions, and HelpAbout.

The virus infects the global macros area upon opening an infected document
(AutoOpen), and infects other documents upon opening and closing (AutoOpen and
AutoClose). Upon exiting MS Word, the virus also creates two infected
documents in the MS Word start-up directory: these documents have the names

The virus turns off the Word virus protection (the VirusProtection option),
hides the Tools/Macro menu (stealth), and blocks Visual Basic editor

Upon opening any document, the virus checks the system date and displays the following messages:

on February 4th:

eX-Sebelas release 3.9
‘Met ulang tahun Natalie Imbruglia !

on November 1st:

eX-Sebelas release 3.9
‘Met ulang tahun Erry Delphiero !

on October 7th:

eX-Sebelas release 3.9
‘Met ulang tahun DaNnY DeSPiRo !

On the 11th of every month starting from April 11, 1999, the virus sets to white
the font color for the whole text in a document (hides the text – white on white),
and then inserts, into the end of the document, the text (with black color):

Viva eX-SeBeLaS !

Starting from April 11, 1999, the virus, every 30 minutes, displays a dialogue
window with a picture. The same dialogue window is displayed upon entering the
Help/About menu.

Also starting from April 11, 1999, upon exiting MS Word, the virus renames the
AUTOEXEC.BAT file to XSEBELAS.BAT and creates a new AUTOEXEC.BAT file that
calls the original program (stored in XSEBELAS.BAT) and then displays the

| eX-SeBeLaS release 3.9 |
| [ special dedicated to Natalie ‘Jane’ Imbruglia ] |
| DaNnY DeSPiRo : |
| Salam saya buat anak-anak SMAN 11 Bandung, Analisis Kimia – UNPAD, |
| Delapan Makhluk Cute (DMC), QLas (KIR SMUN 11 Bandung), ‘truz buat |
| Jihan Fahira (kapan kamu mampir ke rumah lagi ? e-mail saya dong), |
| teman-teman saya di alam fana ini dan spesial buat cewek lucu yang |
| mirip Natalie Imbruglia … [] |
| ErRy DeLPhIeRo : |
| BuAT aNAk-AnAk AMIK-SuKapURa TSM, AMIK-BaNDuNg, DJEPROETH ’95, ‘en |
| BaRuDaK TeAtEr NuAnSa, BuAt GadSam ’95 : DoNt FoRgEt Me … E-MaiL |
| GuE YaCh … Buat ANaK-aNAk ‘ACC’, Buat GaDiS-GaDIs YaNG CaRe ‘en |
| MaU KeNAlaN AMa ErRy di TuNGgU LHo e-maiLnyA, ‘en SpECiaL SmILe To |
| LuTju GiRl NaTaLiE ImBrUgLiA ! [] |
| … sorry for sending you a virus (maybe more than one), we just – |
| want to prove to ourselves that virus programming is very fun … |