Remove Trojan.Iflar

Posted on: June 15th, 2009


Discovered: June 10, 2009
Updated:

June 10, 2009 4:22:54 PM

Type:

Trojan

Systems Affected:

Windows XP, Windows Vista, Windows Server 2003, Windows 2000

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Technical Details:
When the Trojan is executed, it copies itself to the following location:

%Windir%\winlogon.exe

Next, the Trojan creates the following registry entry so that it executes whenever

Windows starts:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

\”winlogon” = “%Windir%\winlogon.exe”

It also creates the following registry entry:

HKEY_LOCAL_MACHINE\Software\Microsoft\Nvchost\”test” = “test”

The Trojan then contacts the following domain on TCP port 80 to download

updates of itself, if available:

endsolar.com

It also downloads content for spam from the above site, including:

  • Email addresses
  • Message bodies
  • Subject lines

The Trojan then creates names for the From field of the spam emails from two lists of female first names and last names.

It gathers email addresses from the Windows Address Book, if present, and sends them to the following location:

endsolar.com

Next, it attempts to send spam emails using a local SMTP server, if one exists.

Otherwise, it attempts to connect to the following SMTP servers in order to send spam emails:

  • mail.[DOMAIN]
  • smtp.[DOMAIN]

Where [DOMAIN] is the domain of the email address being spammed to.

Action Steps:
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