Virus:Worm/Mydoom.CI.2
Date discovered:27/04/2006
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:66.048 Bytes
MD5 checksum:c75fefaff36976c46fb2b6dfc0df7ae0
VDF version:6.34.01.17 - Thursday, April 27, 2006
IVDF version:6.34.01.17 - Thursday, April 27, 2006

 General Method of propagation:
   • Email


Aliases:
   •  Mcafee: W32/Mydoom.bz@MM
   •  Kaspersky: Backdoor.Win32.IRCBot.rg
   •  TrendMicro: WORM_MYDOOM.BO
   •  VirusBuster: I-Worm.Mytob.TL
   •  Eset: Win32/Mydoom.BT


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP


Side effects:
   • Uses its own Email engine
   • Registry modification
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\osalogbe.exe



The following files are created:

– A file that contains collected email addresses:
   • %WINDIR%\mslog\scanlog.txt

– %WINDIR%\mslog\%current date%.sys This file contains collected information about the system.

 Registry The following registry key is added in order to run the process after reboot:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   • "Osalogbe"="%SYSDIR%\osalogbe.exe"

 Email It contains an integrated SMTP engine in order to send emails. A direct connection with the destination server will be established. The characteristics are described in the following:


From:
The sender address is spoofed.
Generated addresses. Please do not assume that it was the sender's intention to send this email to you. He might not know about his infection or might not even be infected at all. Furthermore it is possible that you will receive bounced emails telling you that you are infected. This might also not be the case.


To:
– Email addresses found in specific files on the system.
– Email addresses gathered from WAB (Windows Address Book)
– Generated addresses


Subject:
One of the following:
   • Western Union Payment Notification
   • Bank Wire Transfer
   • Payment Notification
   • Your request has been Approved
   • Life Time Opportunities
   • Congratulations
   • Money Transfer Notification
   • Final Notice Of Payment
   • Please follow this instructions



Body:
The body of the email is one of the lines:
   • Final Notice Of Payment.Please check the attachment for details.
   • Your credit loans has been approved.Please check the attachment for details.
   • Your payment has been confirmed.Please check the attachment for details.
   • The wire transfer information you requested as been sent.Please see the attachment.
   • Your egold payment is waiting for you.Check the attachment for Details
   • Your egold payment is waiting for you.Click the attachment for Details
   • Please check the attached message to claim your money


Attachment:
The filename of the attachment is one of the following:
   • body.zip
   • message.zip
   • test.zip
   • data.zip
   • file.zip
   • text.zip
   • doc.zip
   • readme.zip
   • document.zip



The email looks like the following:


 Mailing Search addresses:
It searches the following files for email addresses:
   • wab
   • adb
   • tbb
   • dbx
   • php
   • sht
   • htm
   • txt
   • tmp


Address generation for TO and FROM fields:
To generate addresses it uses the following strings:
   • sandra; linda; julie; jimmy; jerry; helen; debby; claudia; brenda;
      anna; brent; adam; ted; fred; jack; bill; stan; smith; steve; matt;
      dave; dan; joe; jane; bob; robert; peter; tom; ray; mary; serg; brian;
      jim; maria; leo; jose; andrew; sam; george; david; kevin; mike; james;
      michael; alex; john

It combines this with domains from the following list or from addresses found in files on the system

The domain is one of the following:
   • hotmail.com
   • yahoo.com
   • msn.com
   • aol.com


Avoid addresses:
It does not send emails to addresses containing one of the following strings:
   • accoun; certific; listserv; ntivi; support; icrosoft; admin; page;
      the.bat; gold-certs; feste; submit; not; help; service; privacy;
      somebody; soft; contact; site; rating; bugs; you; your; someone;
      anyone; nothing; nobody; noone; webmaster; postmaster; samples; info;
      root; mozilla; utgers.ed; tanford.e; pgp; acketst; secur; isc.o;
      isi.e; ripe.; arin.; sendmail; rfc-ed; ietf; iana; usenet; fido;
      linux; kernel; google; ibm.com; fsf.; gnu; mit.e; bsd; math; unix;
      berkeley; foo.; .mil; gov.; .gov; ruslis; nodomai; mydomai; example;
      inpris; borlan; sopho; panda; icrosof; syma; avp; .edu; -._!; -._!@;
      abuse; www


Prepend MX strings:
In order to get the IP address of the mail server it has the ability to prepend the following strings to the domain name:
   • gate.
   • ns.
   • relay.
   • mail1.
   • mxs.
   • mx1.
   • smtp.
   • mail.
   • mx.

 IRC To deliver system information and to provide remote control it connects to the following IRC Servers:

Server: irc.perthnet.**********
Port: 6667
Channel: #owoduni

Server: anubis.zanet.**********
Port: 6667
Channel: #owoduni

Server: vt.irc.**********
Port: 6667
Channel: #owoduni

Server: irc.xevio**********
Port: 6667
Channel: #owoduni



– This malware has the ability to collect and send information such as:
    • Information about running processes
    • System directory


– Furthermore it has the ability to perform actions such as:
    • Download file
    • Execute file
    • Perform DDoS attack
    • Send emails
    • Start keylog

 Backdoor The following port is opened:

– %SYSDIR%\osalogbe.exe on TCP port 6666 in order to provide backdoor capabilities.

 File details Programming language:
 The malware program was written in MS Visual C++.


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • ASPack

Description inserted by Irina Boldea on Monday, September 18, 2006
Description updated by Irina Boldea on Tuesday, September 19, 2006

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