Kaspersky Threats

Parent class: VirWare

Viruses and worms are malicious programs that self-replicate on computers or via computer networks without the user being aware; each subsequent copy of such malicious programs is also able to self-replicate. Malicious programs which spread via networks or infect remote machines when commanded to do so by the “owner” (e.g. Backdoors) or programs that create multiple copies that are unable to self-replicate are not part of the Viruses and Worms subclass. The main characteristic used to determine whether or not a program is classified as a separate behaviour within the Viruses and Worms subclass is how the program propagates (i.e. how the malicious program spreads copies of itself via local or network resources.) Most known worms are spread as files sent as email attachments, via a link to a web or FTP resource, via a link sent in an ICQ or IRC message, via P2P file sharing networks etc. Some worms spread as network packets; these directly penetrate the computer memory, and the worm code is then activated. Worms use the following techniques to penetrate remote computers and launch copies of themselves: social engineering (for example, an email message suggesting the user opens an attached file), exploiting network configuration errors (such as copying to a fully accessible disk), and exploiting loopholes in operating system and application security. Viruses can be divided in accordance with the method used to infect a computer:

file viruses
boot sector viruses
macro viruses
script viruses

Any program within this subclass can have additional Trojan functions. It should also be noted that many worms use more than one method in order to spread copies via networks.

Class: Virus

Viruses replicate on the resources of the local machine. Unlike worms, viruses do not use network services to propagate or penetrate other computers. A copy of a virus will reach remote computers only if the infected object is, for some reason unrelated to the virus function, activated on another computer. For example: when infecting accessible disks, a virus penetrates a file located on a network resource a virus copies itself to a removable storage device or infects a file on a removable device a user sends an email with an infected attachment.

Read more

Platform: MSWord

Microsoft Word (MS Word) is a popular word processor and part of Microsoft Office. Microsoft Word files have a .doc or .docx extension.

Description

Technical Details

This virus contains the same set of six macros in NORMAL.DOT and infected files:

AutoExec, AutoOpen, FileSave, FileSaveAs, ToolsMacro, ToolsCustomize

The virus infects files that are opened (AutoOpen) or saved (FileSave, FileSaveAs).

This virus is very dangerous. On starting MS Word (macros AutoExec) the virus checks the system date and time. If day number is 20 or above and current hour is 11 or above, the virus display the text:

Reading menu...Please wait !

It then deletes all files in all subdirectories (except WINDOWS, WINWORD and WINWORD6) and creates the file C:PESAN.TXT and writes following message to there:

Anda rupanya sedang sial, semua file di mesin ini kecuali yang berada
di direktori WINDOWS dan WINWORD telah hilang, jangan kaget, ini bukan
ulah Anda, tapi ini hasil pekerjaan saya...Barang siapa yang berhasil
menemukan cara menangkal virus ini, saya aka" + "n memberi listing
virus ini untuk Anda !!! Dan tentu saja saya akan terus datang kesini
untuk memberi Anda salam dengan virus-virus terbaru dari saya...selamat !
Bandung,  ,   , Jam .

Where , , , e.t.c are current date and time.

The virus also disables Word menus Tools/Macro and Tools/Customize. In its macros the virus keeps destructive routine that never receives control, while accessing the Tools/Macro and Tools/Customize menus that routine displays the MessageBox:

Err@#*(c)
Fail on step 29296

and replaces all "a" characters with "#@" within current document.

Bandung.Rapi

This is a variant of "Bandung" virus. The file erasing routine is disabled (that code presents as comments). Instead of the C:PESAN.TXT file this virus creates the C:BACALH.TXT file and writes the text to there:

Assalamualaikum ..., maaf @Rapi.Kom mengganggu anda sebentar. Pesan
ini aslinya bernama  PESAN.TXT  yang  muncul  di  root direktori
setelah  anda menjalankan Winword 6.0 yang templatenya (normal.dot)
telah  tertulari  macro  menjijikkan ini. Macro ini (sebelum
@Rapi.Kom modifikasi)  berasal  dari  file data Winword 6.0 (*.doc)
yang telah tertular macro ini. Bila file data tersebut  di pangggil
(Open doc), maka macro secara otomatis menjalankan perintah-perintah
macro lain nya,  yang antara  lain mengcopykan  diri ke global
template (normal.dot), juga pada tanggal dan jam tertentu akan
menghapus semua data di direktori tingkat 1, 2 dan 3 (kecuali Hidden
direktori), menjengkelkan bukan ?!. Siapapun pembuatnya pastilah
orang yang sirik !,  masih banyak perbuatan baik lain yang  bisa
kita kerjakan.         ... Malang,  @Rapi.Kom"

is the same as in case of original "Bandung" virus.

Infected documents and infected NORMAL.DOT contain different sets of macros:

Document  � NORMAL.DOT
RpAE      � RpAE        AutoExec
RpFO      � RpFO        FileOpen
RpFS      � RpFS        FileSave
RpTC      � RpTC        ToolsCustomize
RpTM      � RpTM        ToolsMacro
RpFSA     � RpFSA       FileSaveAs
AutoOpen  � RpAO

The virus infects the files on FileOpen, FileSave and FileSaveAs calls. On FileOpen calls the virus also displays MessageBox with the text:

@Rapi.Kom
Thank's for joining with us !

The macros RpTM (ToolsMacro) and RpTC (ToolsCustomize) are corrupted, and while accessing the Word menus Tools/Macro and Tools/Customize the system may halt.

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com

Found an inaccuracy in the description of this vulnerability? Let us know!