BKDR_KELIHOS.R

It sends a GET request to the server to download encrypted data. The encrypted data contains information on its spamming routine. It sends spam mails containing links where other malware can be downloaded.

This malware also displays information on its activities when it is executed with the parameter &"/loggs99&."

This backdoor may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It may also compose messages that can be part of its spamming routine.

It connects to a website to send and receive information.

Arrival Details

This backdoor may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Autostart Technique

This backdoor adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SmartIndex = {malware path and file name}

Propagation

This backdoor may also compose messages that can be part of its spamming routine.

Backdoor Routine

This backdoor opens the following port(s) where it listens for remote commands:

• TCP port 1508
• TCP port 1541
• TCP port 80

It connects to the following websites to send and receive information:

• {BLOCKED}6.26.{BLOCKED}9.3
• {BLOCKED}8.130.{BLOCKED}2.5
• {BLOCKED}6.{BLOCKED}6.88.7
• {BLOCKED}1.{BLOCKED}0.190.17
• {BLOCKED}4.{BLOCKED}6.40.35
• {BLOCKED}5.{BLOCKED}0.48.38
• {BLOCKED}8.{BLOCKED}2.0.45
• {BLOCKED}5.{BLOCKED}8.185.46
• {BLOCKED}4.{BLOCKED}4.243.47
• {BLOCKED}6.9.{BLOCKED}1.57
• {BLOCKED}6.{BLOCKED}3.188.61
• {BLOCKED}8.{BLOCKED}5.92.71
• {BLOCKED}8.{BLOCKED}6.162.106
• {BLOCKED}4.{BLOCKED}9.206.112
• {BLOCKED}9.{BLOCKED}6.135.114
• {BLOCKED}7.{BLOCKED}7.82.118
• {BLOCKED}0.{BLOCKED}3.94.119
• {BLOCKED}1.{BLOCKED}3.70.144
• {BLOCKED}3.{BLOCKED}3.192.151
• {BLOCKED}0.{BLOCKED}9.203.177
• {BLOCKED}1.9.{BLOCKED}7.196
• {BLOCKED}1.{BLOCKED}8.132.200
• {BLOCKED}8.2.{BLOCKED}2.206
• {BLOCKED}3.{BLOCKED}2.36.213
• {BLOCKED}2.{BLOCKED}4.33.227
• {BLOCKED}9.{BLOCKED}5.213.227
• {BLOCKED}8.{BLOCKED}3.238.240
• {BLOCKED}8.{BLOCKED}1.143.249
• {BLOCKED}8.{BLOCKED}5.214.250

Other Details

This backdoor displays the following images:

• This malware displays information on its activities when it is executed with the parameter "/loggs99&":

  

It does the following:

• Sends the following GET request to the server to download encrypted data:
  • GET /{BLOCKED}re26NS3/1J2k.htm
  The encrypted data contains information on its spamming routine. It sends spam mails containing links where other malware can be downloaded.
• The emails it sends have the following format:

  From: {name}
  Subject: {subject}
  
  {name} {message1} {message2}
  {message3}
  {malicious link}

• As of this writing, {name} can be any of the following names:
  • Abraham
  • Adalbert
  • Baldwin
  • Barbara
  • Candida
  • Carol
  • Daniel
  • Dannie
  • Eddie
  • Edgar
  • Fanny
  • Felicia
  • Gabriel
  • Geffrey
  • Hadrian
  • Hannah
  • Irene
  • Isaac
  • Jacob
  • James
  • Katharine
  • Kathleen
  • Lambert
  • Laura
  • Mabel
  • Madeleine
  • Nance
  • Nancy
  • Odette
  • Olive
  • Paddy
  • Patricia
  • Rachel
  • Ralph
  • Sadie
  • Sally
  • Teddy
  • Terry
  • Valentine
  • Veronica
  • Wallace
  • Walter
• {Subject} can be any of the following:
  • Happy 2011!
  • You've got a Happy New Year Greeting Card!
  • I made an Ecard for U!
  • Enjoy the New Year!
  • Wishing you the Best New Year!
• {message1} can be any of the following:
  • just mailed to you
  • wants to show you
  • has created for you
• {message2} can be any of the following:
  • a postcard.
  • an ecard.
  • an electronic New Year greeting card.
  • a digital postcard.
  • a New Year ECard.
  • an Online greeting card.
• {message3} can be any of the following:
  • Click on the link below to see your greeting card:
  • Collect your E-card here:
  • It is waiting for you at our card site, go ahead and see it!
  • To pick up your greeting card, click on the following link at anytime within the next 30 days:
  • To view the ecard simply click the link below:
• {malicious link} can be any of the following malicious links where other malware can be downloaded:
  • http://{BLOCKED}onnectiontexas.com/5gsgr3nw.html
  • http://{BLOCKED}group.com/eumuwgyw.html
  • http://{BLOCKED}olombia.com/uhiwcnda.html
  • http://{BLOCKED}mineshop.com/c2caiytp.html
  • http://{BLOCKED}t.info/bl851f3d.html
  • http://{BLOCKED}team.com/lk35bsbg.html
  • http://{BLOCKED}ley.{BLOCKED}ersystem.com/n1n8s9vk.html
  • http://{BLOCKED}nphoto.com/nk975y3.html
  • http://{BLOCKED}terautoelectric.com/h7cc4mm6.html
  • http://{BLOCKED}gordon.com/ou6qdnk6.html