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Virus:BDS/Fanbot.B
Date discovered:13/12/2012
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:37.888 Bytes
MD5 checksum:a1e3737d0b5dd6ee3fdb84170b8f7ab8
VDF version:7.11.53.216

 General Method of propagation:
   • Email


Aliases:
   •  Symantec: W32.Mytob@mm
   •  Kaspersky: Backdoor.Win32.Fanbot.b
   •  TrendMicro: WORM_MYTOB.KV
   •  F-Secure: W32/Mytob.MI@mm
   •  Bitdefender: Backdoor.Fanbot.B


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


Side effects:
   • Blocks access to certain websites
   • Blocks access to security websites
   • Drops a file
   • Records keystrokes
   • Registry modification
   • Third party control


Right after execution the following information is displayed:


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



It deletes the initially executed copy of itself.



The following file is created:

c:\Shell.sys This file contains collected keystrokes.

 Registry The following registry keys are added in order to run the processes after reboot:

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Userinit"="userinit.exe,Phantom.exe"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="Explorer.exe Phantom.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:
   • *DETECTED* Online User Violation
   • Email Account Suspension
   • Important Notification
   • Members Support
   • Notice of account limitation
   • Security measures
   • Warning Message: Your services near to be closed.
   • You have successfully updated your password
   • Your Account is Suspended
   • Your Account is Suspended For Security Reasons
   • Your new account password is approved
   • Your password has been successfully updated
   • Your password has been updated

Furthermore the subject line could contain random letters.


Body:

   • Dear user %username from receiver's email address%,
     
     You have successfully updated the password of your %receiver's domain name from email address% account.
     
     If you did not authorize this change or if you need assistance with your account, please contact %receiver's domain name from email address% customer service at: %sender's email address%
     
     Thank you for using %receiver's domain name from email address% !
     The %receiver's domain name from email address% Support Team
     
     
     
     
     
     
     +++ Attachment: No Virus (Clean)
     +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address%

   •
     Dear user %username from receiver's email address%,
     
     It has come to our attention that your %receiver's domain name from email address% User Profile ( x ) records are out of date. For further details see the attached document.
     
     Thank you for using %receiver's domain name from email address% !
     The %receiver's domain name from email address% Support Team
     
     
     
     
     
     
     +++ Attachment: No Virus (Clean)
     +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address%

   •
     Dear %receiver's domain name from email address% Member,
     
     We have temporarily suspended your email account %receiver's email address%.
     
     This might be due to either of the following reasons:
     
     1. A recent change in your personal information (i.e. change of address).
     2. Submiting invalid information during the initial sign up process.
     3. An innability to accurately verify your selected option of subscription due to an internal error within our processors.
     See the details to reactivate your %receiver's domain name from email address% account.
     
     Sincerely,The %receiver's domain name from email address% Support Team
     
     
     
     
     
     
     +++ Attachment: No Virus (Clean)
     +++ %receiver's domain name from email address% Antivirus - www.%receiver's domain name and top level domain from email address%

   •
     Dear %receiver's domain name from email address% Member,
     
     Your e-mail account was used to send a huge amount of unsolicited spam messages during the recent week. If you could please take 5-10 minutes out of your online experience and confirm the attached document so you will not run into any future problems with the online service.
     
     If you choose to ignore our request, you leave us no choice but to cancel your membership.
     
     Virtually yours,
     The %receiver's domain name from email address% Support Team
     
     
     
     
     
     
     +++ Attachment: No Virus found
     +++ %receiver's domain name from email address% Antivirus - www..%receiver's domain name and top level domain from email address%


Attachment:
The filename of the attachment is one of the following:
   • accepted-password.zip
   • account-details.zip
   • account-info.zip
   • account-password.zip
   • account-report.zip
   • approved-password.zip
   • document.zip
   • email-details.zip
   • email-password.zip
   • important-details.zip
   • new-password.zip
   • password.zip
   • readme.zip
   • updated-password.zip
   • %random character string%

The attachment is a copy of the malware itself.

 Mailing Search addresses:
It searches the following files for email addresses:
   • wab; html; adb; tbb; dbx; asp; php; xml; cgi; jsp; sht; htm; txt


Address generation for FROM field:
To generate addresses it uses the following strings:
   • webmaster
   • register
   • info
   • admin
   • service
   • mail
   • administrator
   • support

It may combine the first string with the following:
   • %receiver's domain name from email address%



Address generation for TO field:
To generate addresses it uses the following strings:
   • kula; sandra; adam; frank; linda; julie; jimmy; jerry; helen; debby;
      claudia; brenda; anna; sales; brent; paul; 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; josh; john

It may combine the first string with the following:
   • %receiver's domain name from email address%



Avoid addresses:
It does not send emails to addresses containing one of the following strings:
   • .edu; abuse; www; fcnz; spm; master; accoun; certific; listserv;
      ntivi; 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; be_loyal:; slashdot; sourceforge;
      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; support; messagelabs; ruslis; nodomai;
      mydomai; example; inpris; borlan; sopho; panda; hotmail; msn.;
      icrosof; syma; avp


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 Server:

Server: **********.3322.org
Channel: #xiaoyu
Nickname: [Phantom]%random character string%



 This malware has the ability to collect and send information such as:
     Collected Email addresses
    • CPU speed
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Size of memory
    • Information about the Windows operating system


 Furthermore it has the ability to perform actions such as:
     connect to IRC server
     Launch DDoS ICMP flood
     Launch DDoS SYN flood
    • Launch DDoS TCP flood
     Launch DDoS UDP flood
     disconnect from IRC server
    • Download file
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Restart system
    • Send emails
    • Shut down system
     Start keylog
    • Terminate malware
    • Terminate process
     Updates itself
    • Upload file
     Visit a website

 Hosts The host file is modified as explained:

In this case existing entries are deleted.

Access to the following domains is effectively blocked:
   • jiangmin.com
   • www.jiangmin.com
   • Update2.JiangMin.com
   • Update3.JiangMin.com
   • rising.com.cn
   • www.rising.com.cn
   • online.rising.com.cn
   • iduba.net
   • www.iduba.net
   • kingsoft.com
   • db.kingsoft.com
   • scan.kingsoft.com
   • kaspersky.com.cn
   • www.kaspersky.com.cn
   • symantec.com.cn
   • www.symantec.com.cn
   • www.symantec.com
   • securityresponse.symantec.com
   • symantec.com
   • www.sophos.com
   • sophos.com
   • www.mcafee.com
   • mcafee.com
   • liveupdate.symantecliveupdate.com
   • www.viruslist.com
   • viruslist.com
   • viruslist.com
   • f-secure.com
   • www.f-secure.com
   • kaspersky.com
   • kaspersky-labs.com
   • www.avp.com
   • www.kaspersky.com
   • avp.com
   • www.networkassociates.com
   • networkassociates.com
   • www.ca.com
   • ca.com
   • mast.mcafee.com
   • my-etrust.com
   • www.my-etrust.com
   • download.mcafee.com
   • dispatch.mcafee.com
   • secure.nai.com
   • nai.com
   • www.nai.com
   • update.symantec.com
   • updates.symantec.com
   • us.mcafee.com
   • liveupdate.symantec.com
   • customer.symantec.com
   • rads.mcafee.com
   • trendmicro.com
   • www.pandaguard.com
   • pandasoftware.com
   • www.pandasoftware.com
   • www.trendmicro.com
   • www.grisoft.com
   • www.microsoft.com
   • microsoft.com
   • www.virustotal.com
   • virustotal.com
   • www.amazon.com
   • www.amazon.co.uk
   • www.amazon.ca
   • www.amazon.fr
   • www.paypal.com
   • paypal.com
   • moneybookers.com
   • www.moneybookers.com
   • www.ebay.com
   • ebay.com




The modified host file will look like this:


 Miscellaneous Mutex:
It creates the following Mutex:
   • [Phantom]


String:
Furthermore it contains the following string:
   • [Phantom] 2005 by Evil[xiaoyu](2005.10.04). Special Thanks: x140d4n(my real&&best friend&&brother!!!).

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

Description inserted by Razvan Olteanu on Tuesday, October 11, 2005
Description updated by Razvan Olteanu on Wednesday, November 30, 2005

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