TROJ_FAKEAV.SM18

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats.

It deletes itself after execution.

It displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

• %Application Data%\{random folder name}\{random file name}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It drops the following non-malicious file:

• %Application Data%\{random folder name}\{random file name}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It creates the following folders:

• %Application Data%\{random folder name}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{random file name} = %Application Data%\{random folder name}\{random file name}.exe

Download Routine

This Trojan connects to the following malicious URLs:

• http://{BLOCKED}.{BLOCKED}.53.223/lurl.php
• http://{BLOCKED}.{BLOCKED}.53.223/install.php

Other Details

This Trojan does the following:

• Displays the following graphical user interface (GUI):
  
  
  
  
  
  
  
  
  
• Prevents the execution of any executable file, aside from the following:
  • aeadisrv.exe
  • alg.exe
  • audiodg.exe
  • conhost.exe
  • csrss.exe
  • ctfmon.exe
  • dwm.exe
  • explorer.exe
  • firefox.exe
  • httpd.exe
  • iastordatamgrsvc.exe
  • iexplore.exe
  • lsass.exe
  • lsm.exe
  • mdnsresponder.exe
  • mfnsvc.exe
  • nvscpapisvr.exe
  • nvsvc.exe
  • nvvsvc.exe
  • opera.exe
  • pdagent.exe
  • rundll32.exe
  • searchindexer.exe
  • services.exe
  • slsvc.exe
  • slsvc.exe
  • smss.exe
  • snort.exe
  • spoolsv.exe
  • svchost.exe
  • taskhost.exe
  • wininit.exe
  • winlogon.exe
  • winroute.exe
  • wmiprvse.exe
  • wscntfy.exe
  • wuauclt.exe

It deletes itself after execution.

Rogue Antivirus Routine

This Trojan displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

NOTES:
If users decide to purchase the rogue product, users are directed to the following sites asking for sensitive information, such as credit card numbers:

• http://{BLOCKED}.{BLOCKED}.110.95/buy.php

• Credit card information such as card type, card number, expiration date, name
• Contact information such as email, country, address, phone number

• http://{BLOCKED}ritysolutions.biz/