Sophos

W32/Apology-B

Aliases
  • W32/MTX@MM
  • I-Worm.MTX
  • W32/MTX
Category
Type
What to do
Prevalence low high

Summary

 
Included in our products from November 2000 (3.39)
Detected by All Sophos products

Action

For information about disinfecting this virus please refer to How to remove W32/Apology-B.

More Information

W32/Apology-B is a file infecting virus with email-aware worm and backdoor characteristics.

During the infection process the virus creates three hidden files in the windows directory.

IE_Pack.exe contains code which modifies wsock32.dll. Win32.dll is a copy of the file sent by email, it contains code for all components of the virus. MTX_.exe is the backdoor component. When it is executed it tries to connect to a website and download further programs to run.

The virus replaces wsock32.dll with a modified version which monitors network traffic. When the virus detects the user sending an email, it will send another to the same recipient. The message will have no subject or body text, only an attachment with one of the following names:

README.TXT.pif
I_wanna_see_YOU.TXT.pif
MATRiX_Screen_Saver.SCR
LOVE_LETTER_FOR_YOU.TXT.pif
NEW_playboy_Screen_saver.SCR
BILL_GATES_PIECE.JPG.pif
TIAZINHA.JPG.pif
FEITICEIRA_NUA.JPG.pif
Geocities_Free_sites.TXT.pif
NEW_NAPSTER_site.TXT.pif
METALLICA_SONG.MP3.pif
ANTI_CIH.EXE
INTERNET_SECURITY_FORUM.DOC.pif
ALANIS_Screen_Saver.SCR
READER_DIGEST_LETTER.TXT.pif
WIN_$100_NOW.DOC.pif
IS_LINUX_GOOD_ENOUGH!.TXT.pif
QI_TEST.EXE
AVP_Updates.EXE
SEICHO-NO-IE.EXE
YOU_are_FAT!.TXT.pif
FREE_xxx_sites.TXT.pif
I_am_sorry.DOC.pif
Me_nude.AVI.pif
Sorry_about_yesterday.DOC.pif
Protect_your_credit.HTML.pif
JIMI_HMNDRIX.MP3.pif
HANSON.SCR
FUCKING_WITH_DOGS.SCR
MATRiX_2_is_OUT.SCR
zipped_files.EXE
BLINK_182.MP3.pif

When it is active the virus will also attempt to block user access to websites which contain information about viruses. It blocks access to sites whose URLs include text from the list below.

NII.
nai.
avp.
AVP.
F-Se
f-se
mapl
pand
soph
ndmi
afee
yenn
lywa
tbav
yman

It also prevents the user from sending email to organisations whose domain name begins with text from the following list

NII.
nai.
avp.
AVP.
F-Se
f-se
wildlist.o
il.esafe.c
perfectsup
complex.is
HiServ.com
hiserv.com
metro.ch
beyond.com
mcafee.com
pandasoftw
earthlink.
inexar.com
comkom.co.
meditrade.
mabex.com
cellco.com
symantec.c
successful
inforamp.n
newell.com
singnet.co
bmcd.com.a
bca.com.nz
trendmicro
sophos.com
maple.com.
netsales.n
f-secure.c
F-Secure.c

If you detect W32/Apology-B we recommend using Sophos Anti-Virus in full mode to detect all fragments which may be present on the PC.

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