Backdoor

Bonjour a tous, j'ai le même problème avec le message de Norton qui me dit que mon PC est iffecté du virus Blanckdoor fichier w.sys.32 msfpk.dll . j'ai fait un scan en ligne avec symatec il ne trouve rien, lorsque je lance Norton, aucun résultat et pourtant a chaque demarage de mon PC, j'ai le message d'alerte de Norton, impossible de trouver le fichier msfpk ? Merci de bien me communiquer une solution.
Merci

47 réponses

Résumé de la discussion

Un message d’alerte Norton signale au démarrage que le PC est infecté par le virus Blanckdoor via le fichier w.sys.32 msfpk.dll, et les scans en ligne ne détectent rien alors que Norton continue d’afficher l’alerte. Plusieurs interventions proposent des approches combinant méthodes manuelles et outils spécialisés: démarrer en mode sans échec, utiliser msconfig et regedit pour supprimer les entrées et le fichier, ou recourir à CWShredder pour les variantes associées. Par ailleurs, certains signalent que le fichier peut persister et que l’infection évolue, avec des noms tels que backdoor trojan ou backdoor agent B, soulignant l’intérêt d’un dépistage ciblé et d’une remise en sécurité.

Bobot (l’IA à votre service)
  1. Contributeur sécurité
    salut
    click sur demarrer puis executer tu tape msconfig tu vas sur l onglet demarrage tu regarde si tu trouve quelque chose en rapport avec tu decoche et appliquer tu redemarre une fenetre vas s ouvrir tu coche ne plus afficher ce message et ok

    la chasse et la balltrap ma vrai passion
    voir site perso dans profil
    1. Non rien ne correspond a mon viruis sur demarrage j'ai trouvé le fichier dans la base de registre, mais impossible de le supprimer il revient a chaque demarage du PC. Bravo pour ton site, c'est également ma passion domage qu'il n'y ai pas une adresse e-mail sur ton site pour communiquer.
      Merci
      1. Contributeur sécurité
        ok
        merci pour mon site je ne met pas d email car je n ouvre que ce que je connait c est pour ca peut etre que je le ferais avec une autre adresse on verra
        pour ton cas fait ceci pour voir
        http://membres.lycos.fr/aricop/forum/dllfix.exe

        -Pose-le sur le bureau.
        -Double-clique.
        -Décompresse-le sur le bureau.
        -Double-clique "Start.bat" et choisis l'option 1 pour le rapport.
        -Une fois la recherche terminée, un fichier txt doit apparaître sous
        le nom "Output.txt" et sera sauvegardé dans le dossier.
        -Copie/colle le contenu de "Output.txt" dans ta réponse.

        la chasse et la balltrap ma vrai passion
        voir site perso dans profil
        1. Non je n'y arrive pas, j'ai toujours le message d'alerte au démarage du PC m'informant du virus
          Merci

          Voir mon site perso dans Profil
          1. Modérateur
            Salut.

            En complément de ce qu'a suggéré Balltrap ci-dessus :

            1 - les "virus" détectés sous les noms de "backdoor.xxxx" (contracté souvent en "bkdr") ou de "trojan.xxxx" ou de "troj.xxxx" ne sont pas vraiment des virus mais des chevaux de troie dont les antivirus traditionnels ont presque toujours du mal à se débarrasser , ce qui est normal : ils ne sont pas conçus pour ça !
            Lire absolument => http://www.commentcamarche.net/virus/trojan.php3

            2 - un logiciel facile, gratos et efficace pour en virer certains (mais pas tous) est SpybotS&d, avec notamment une version française, disponible ici http://sebsauvage.net/logiciels/spybotsd.html ou bien aussi TheCleaner http://www.moosoft.com/thecleaner/download.php ; et puis il existe des scans anti-troyens en ligne ici http://assiste.free.fr/p/frameset/03_06.php

            3 - l'installation d'un firewall (http://www.commentcamarche.net/lan/firewall.php3) est indispensable pour limiter ce genre de souci à l'avenir ; large choix ici => http://www.firewall-net.com/fr/

            4 - en matière de sécurité au sens large, visiter http://sebsauvage.net et notamment http://sebsauvage.net/safehex.html

            A+

            -=O(_BmV_)O=-  L'amour comme épée,
                  ||       ||       l'humour comme bouclier. 
            1. Je viens de faire un scan anti-trojan comme vous me l'avais conseillé, la réponse est aucun trojan détecté ????
              Je ne comprends plus rien
              pourtant il y est toujours, j'ai toujours le message de norton que je ne peux pas supprimer.
              merci

              Voir mon site perso dans Profil
              1. Contributeur sécurité
                salut
                reessaie se que j ai mis au n°3
                pourquoi tu dit que tu ny arrive pas

                la chasse et la balltrap ma vrai passion
                voir site perso dans profil
                1. Aprés avoir chargé http://membres.lycos.fr/aricop/forum/dllfix.exe l'avoir ouvert
                  Je ne vois nulle part start.bat
                  il y a un fichier start qui ouvre une fenêtre noire système 32, je ne vois pas comment faire une recherche pour trouver un fichier txt.
                  Merci de ton aide deaçon plus simple et surtout plus explicite je ne suis pas assez bon pour de telle manip
                  merci

                  Voir mon site perso dans Profil
                  1. Contributeur sécurité
                    re
                    quant tu la telecharger il faut le decompresser dans le meme dossier ensuite tu te retrouve avec un fichier star.bat
                    tu click dessus un fenetre dos s ouvre tu tape 1
                    et entre a la fin tu as un fichier text tu fait un coppier coller et tu le met ici

                    la chasse et la balltrap ma vrai passion
                    voir site perso dans profil
                    1. Tu me dis a la fin du message tu fais un copier coller et tu le mets ici, c'est ou ici ??
                      Voilà ce que je trouve ???
                      merci

                      Voir mon site perso dans Profil
                      1. Voilà ce que je trouve-

                        -==***@@@ I N F O @@@***==--

                        FIND-ALL.bat -- Report saved; Output.txt

                        Extended 'AppInit_Dlls' value saved as: "windows.txt"

                        Please wait till the search is complete...
                        C:\WINDOWS\System32\MSFPK.DLL +++ File read error
                        C:\WINDOWS\System32\MSFPK.DLL +++ File read error
                        C:\WINDOWS\System32\MSFPK.DLL +++ File read error
                        Impossible de trouver C:\PROGRA~1\Wanadoo\CHRIS~1.ROU\FICHIE~1\dllfix\mdb.txt

                        The operation completed successfully
                        drive.txt
                        ver.txt
                        up.txt
                        file.txt
                        appinit.txt
                        bhos.txt
                        protocols.txt
                        key.txt
                        1 fichier(s) copié(s).

                        Voir mon site perso dans Profil
                        1. Contributeur sécurité
                          on vas y arriver
                          -Relance "dllfix.exe" du début. Cette fois-ci option "2 : run fix"

                          Sous menu "1- Enter dll name..."

                          Tu rentres le nom :C:\WINDOWS\System32\MSFPK.DLL

                          Touche entrée.

                          -Il va la chercher et la supprimer après un redémarrage.

                          -Passer CoolWebSchredder : ->Fix.

                          -Passer AdAware et supprimer tout ce qu'il trouvera.
                          (Passer CWS et AdAware impérativement, même si ça a été fait avant!)
                          voici les lien des 2 log a telecharger avant
                          CWShredder
                          http://www.spywareinfo.com/~merijn/downloads.html

                          la chasse et la balltrap ma vrai passion
                          voir site perso dans profil
                          1. Est-ce normal qui inscrive toujours la même chose ?
                            Merci

                            Voir mon site perso dans Profil ╔══════════════════════════════╗
                            ║ Cws Searchx Fix 3.01 060504 ║
                            ╠══════════════════════════════╣
                            ║ 1. Enter Dll name Manually ║
                            ║ 2. Run Fix without Dll Name ║
                            ║ It will be searched for ║
                            ║ Later ║
                            ║ E. Exit ║
                            ╚══════════════════════════════╝
                            {1,2,E}2
                            installing files
                            1 fichier(s) copié(s).
                            1 fichier(s) copié(s).
                            1 fichier(s) copié(s).
                            1 fichier(s) copié(s).
                            1 fichier(s) copié(s).
                            Backing up Registry Hive
                            Deleting Windows Key
                            C:\WINDOWS\System32\MSFPK.DLL
                            Adding Test Windows Key
                            Restoring temp Values Key
                            Deleting Bad Appinit Value
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            Testing to make sure Appinit Value is gone. IF error than its not there.
                            1. Contributeur sécurité
                              re
                              que dit norton maitenent

                              la chasse et la balltrap ma vrai passion
                              voir site perso dans profil
                              1. J'ai redemarre le PC, le message apparait toujours.
                                merci

                                Voir mon site perso dans Profil
                                1. Contributeur sécurité
                                  bizzard
                                  relance dllfix tape 2 et click entree
                                  met le chemin complet de la dll
                                  C:\WINDOWS\System32\MSFPK.DLL
                                  et desuite apres passe les 2 log

                                  la chasse et la balltrap ma vrai passion
                                  voir site perso dans profil
                                  1. Je viens de faire tout ce que tu m'as conseillé, c'est toujours pareil, je suis désespéré
                                    Merci pour tout

                                    Voir mon site perso dans Profil
                                    1. Contributeur sécurité
                                      tu as passer les 2 log et supprimer ce qu il trouve

                                      la chasse et la balltrap ma vrai passion
                                      voir site perso dans profil
                                      1. oui, voilà le resultat apparement le système est clean et pourtant aprés redemarage il il a toujours le message d'alerte de Virus banckdoor de NortonDone!
                                        Your system was completely clean.

                                        Windows XP (5.01.2600 SP1)
                                        CWShredder v1.59.1
                                        Written by Merijn - merijn@spywareinfo.com

                                        For any additional help with this program or removing CWS, visit:
                                        http://forums.spywareinfo.com/

                                        For information and documentation on the Coolwebsearch
                                        trojan and its variants, visit:
                                        http://www.spywareinfo.com/~merijn/cwschronicles.html

                                        For donations to help support CWShredder, visit:
                                        http://www.spywareinfo.com/~merijn/donate.html

                                        Voir mon site perso dans Profil
                                        1. Contributeur sécurité
                                          dur dur
                                          norton te donne le chemin du trojan

                                          la chasse et la balltrap ma vrai passion
                                          voir site perso dans profil
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