Virus Database

I-Worm.Aliz

Description I-Worm.Aliz

This is a virus-worm that spreads via the Internet, attached to infected e-mails. The worm itself is a Windows PE EXE file about 4Kb in length and written in Assembler. The main worm code is compressed by a built-in aPLib data compression algorithm, so the original worm code is about 6Kb.
The infected messages contain:
Subject: different (see below)
Body: empty HTML message
Attach: whatever.exe

The Subject is randomly constructed from variants (str1 + str2 + all + str5):
str1
----

Fw:
Fw: Re:

then:

str2 str3 str4 str5
---- ---- ---- ----

Cool website to check !!
Nice site for you !
Hot pics i found :-)
some urls to see ?!
Funny pictures here hehe ;-)
weird stuff - check it
funky mp3s
great shit
Interesting music
many info

To run from an infected message, the worm uses a security breach (IFRAME vulnerability, similar to the one used by the "Nimda" worm). So the worm may be activated from infected e-mail simply upon reading or previewing the message.
When an infected file is run, the unpacking routine takes control, unpacks the main worm code into the memory and jumps to it. The main code then sends infected messages to e-mail addresses found in WAB (Windows Address Book). To send e-mails, the worm connects to default the SMTP server.
The worm does not install itself to the system and is not activated anymore (except cases when a user clicks on an attached e-mail again).
The worm has no payload routine and does not manifest itself in any way.
The e-mail spreading routine contains weak mistakes, and it seems the worm is not able to spread under many e-mail client-server configurations.
The most interesting thing about worm is the fact that the activating-and-spreading routine (this is the main routine) is full in just about 3K of executable code.
The worm contains the following text:
:::iworm.alizee.by.mar00n!ikx2oo1:::
while typing this text i realize this text got added on many av description sites, because this silly worm could be easily a hype. i wonder which av claims '[companyname] stopped high risk worm before it could escape!' or shit like that. heh, or they boycot my virus because of this text. well, it is easy enough for the poor av's to add this worm; since it was only released as source in coderz#2... btw, loveletter*2 power in pure win32asm and only a 4k exe file. heh, vbs kiddies, phear win32asm. :) thx to: bumblebee!29a, asmodeus!ikx. greets to: starzer0!ikx, t-2000!ir, ultras!mtx & sweet gigabyte...btw,burgemeester van sneek: ik zoek nog een baantje...(alignmentfillingtext)

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Mecdon.1470

Description Mecdon.1470

This is a relatively harmless non-memory resident encrypted parasitic virus. It searches for EXE files in the current drive subdirectory tree, then writes itself to the end of the file. On Tuesdays, the virus displays the following message:
+---- Virus Warning : ----+
| I HATE mans who CAN`T do |
| anyfing USEFUL MallCDON`T |
| LET to do it for OTHERS. |
+--------------------------+

Mef.1481

Description Mef.1481

These are a harmless memory resident encrypted parasitic viruses. They hook INT 21h and writes themselves to the end of COM- and EXE-files that are executed or opened. The viruses check the file names and do not infect the files: AVG.*, ASTA*.*, STRO*.*, DPMI*.*, RTM.*, SCAN*.*.
The viruses use anti-debugger tricks, and under debugger they switch to search-and-infect routine that search for COM- and EXE-files in DOS or C:DOS directories, and infects them.
The virus contains the internal text strings:
*.exe *.com dos
AVG.ASTASTRODPMIRTM.SCAN
COMEXE

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