Dialer:W32/CarpeDiem

Classification

Category :

Riskware

Type :

Dialer

Summary

A program that connects the computer to the Internet via a telephone line and modem. Malicious dialers will secretly connect the computer to premium-rate lines.

Removal

Based on the settings of your F-Secure security product, it may block the file from running, move it to the quarantine where it cannot spread or cause harm, or ask you to select an action.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

The detection name Dialer:W32/Carpediemidentifies various premium-rate content dialers associated with the Carpediem.fr domain.

These programs provide users with an Internet connection by dialing an expensive pay-per-minute phone number with the computer's modem, while offering access to pornographic content.

Installation

When first executed, the dialer will create copies of itself in the following locations:

  • %windir%\Temp\MT\[filename].exe
  • %programfiles%\Montorgueil\[filename]\[filename].exe

A start menu folder with the name HOT Dialer containing shortcuts to the file will be created, as well as a desktop shortcut.

It then presents the user with an End User License Agreement (EULA) and various message boxes, which the user must click through to approve usage of the premium number. The user is given multiple opportunities to decline usage.

Registry Modifications

Sets these values:

  • HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Lockdown_Zones\4\MUICache\& C:\WINDOWS\Temp\MT\sample.exe = H o t C o n n e c t o r
  • HKCU\Software\Microsoft\SystemCertificates\TrustedPublisher\Certificates\2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353& Blob =
  • HKCU\Software\Montorgueil\Kit0& Modem =
  • HKCU\Software\Montorgueil\Kit0& CanLaunch = N
  • HKCU\Software\Montorgueil\Kit0& Device =
  • HKCU\Software\Montorgueil\Kit0& Num = 0
  • HKCU\Software\Montorgueil\Kit0& Prefixe =
  • HKCU\Software\Montorgueil\Kit0& Silent = N
  • HKCU\Software\Montorgueil\Kit0& Standard = N
  • HKCU\Software\Montorgueil\Kit0/17165\1& Fournisseur = 0
  • HKCU\Software\Montorgueil\Kit0/17165\1& Ver = 1406368
  • HKCU\Software\Montorgueil\Kit0/17165\1& Produit = 429
  • HKCU\Software\Montorgueil\Kit0/17165\1& Tracking = 0
  • HKCU\Software\Montorgueil\Kit0\UserId& ID = 0025718
  • HKCU\Software\Montorgueil\Kit0\UserId& Pays = 1
  • HKCU\Software\Montorgueil\Kit0\UserId& Langue = 9

Creates these keys:

  • HKCU\Software\Microsoft\SystemCertificates\TrustedPublisher\Certificates\2DCB4C0C78BBE64B52C0312BAB2E95EA2971C353
  • HKCU\Software\Montorgueil
  • HKCU\Software\Montorgueil\Kit0
  • HKCU\Software\Montorgueil\Kit0\17165
  • HKCU\Software\Montorgueil\Kit0/17165
  • HKCU\Software\Montorgueil\Kit0/17165\1
  • HKCU\Software\Montorgueil\Kit0\UserId