Analysis by: Clive Fuentebella
 

a variant of MSIL/WebCompanion.C potentially unwanted application (NOD32)

 Plate-forme:

Windows

 Overall Risk:
 Dommages potentiels: :
 Distribution potentielle: :
 reportedInfection:
 Information Exposure Rating::
Faible
Medium
Élevé
Critique

  • Type de grayware:
    Potentially Unwanted Application

  • Destructif:
    Non

  • Chiffrement:
    Non

  • In the wild::
    Oui

  Overview

Voie d'infection: Aus dem Internet heruntergeladen, Fallen gelassen von anderer Malware

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

  Détails techniques

File size: 507,592 bytes
File type: EXE
Memory resident: Non
Charge malveillante: Connects to URLs/IPs, Drops files

Übertragungsdetails

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

Installation

Schleust die folgenden Dateien ein:

  • %Application Data%\Lavasoft\Web Companion\Options\CData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\FData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\IData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\Language.txt
  • %Program Files%\Lavasoft\Web Companion\Application\{Language code}\WebCompanion.resources.dll
  • %Program Files%\Lavasoft\Web Companion\Application\{Language code}\WebCompanionInstaller.resources.dll
  • %Program Files%\Lavasoft\Web Companion\Application\7za.exe
  • %Program Files%\Lavasoft\Web Companion\Application\acs17.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Ad-Aware Web Companion.exe
  • %Program Files%\Lavasoft\Web Companion\Application\BCUEngineS.dll
  • %Program Files%\Lavasoft\Web Companion\Application\BCUSDK.dll
  • %Program Files%\Lavasoft\Web Companion\Application\DotNetZip.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Esent.Interop.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Extension\@wcextensionff.xpi
  • %Program Files%\Lavasoft\Web Companion\Application\ICSharpCode.SharpZipLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.IWshRuntimeLibrary.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.LavasoftTcpServiceLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.SHDocVw.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.Shell32.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.WUApiLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Ionic.Zip.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.adblocker.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.AppCore.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Automation.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Compression.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.CSharp.Utilities.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Events.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Extension.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.IEController.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Omni.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SearchProtect.Business.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SearchProtect.Repositories.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Settings.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SysInfo.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Utils.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Utils.SqlLite.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.Service.Logger.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WcfService.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\liblz4.dll
  • %Program Files%\Lavasoft\Web Companion\Application\log4net.dll
  • %Program Files%\Lavasoft\Web Companion\Application\LZ4.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Microsoft.mshtml.dll
  • %Program Files%\Lavasoft\Web Companion\Application\MozCompressor.dll
  • %Program Files%\Lavasoft\Web Companion\Application\NCalc.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Newtonsoft.Json.dll
  • %Program Files%\Lavasoft\Web Companion\Application\System.Data.SQLite.dll
  • %Program Files%\Lavasoft\Web Companion\Application\ucrtbased.dll
  • %Program Files%\Lavasoft\Web Companion\Application\vcruntime140d.dll
  • %Program Files%\Lavasoft\Web Companion\Application\WcCommunication.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WcCommunication.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebcompaionReimageIcon.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.Loader.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionExtensionIE.dll
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionIcon_Pro.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionIcon.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.pdb
  • %Program Files%\Lavasoft\Web Companion\Application\x64\SQLite.Interop.dll
  • %Program Files%\Lavasoft\Web Companion\Application\x86\SQLite.Interop.dll
  • %ProgramData%\Lavasoft\Web Companion\Logs\Webcompanion\webcompanion.log
  • %ProgramData%\Lavasoft\Web Companion\Options\ActiveFeatures.zip
  • %ProgramData%\Lavasoft\Web Companion\Options\ChannelInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\CurrentReleaseNotes.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\EventSafeguard.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\FeatureActions.zip
  • %ProgramData%\Lavasoft\Web Companion\Options\install.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\LatestReleaseNotes.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\partner.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\PerformedActions.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ProfileInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ProfileInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ServicePartnerInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\Statistics.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\UpdateServer.txt
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\Lavasoft\WebCompanion\Frequently Asked Questions.url
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\Lavasoft\WebCompanion\Web Companion.lnk
  • %User Temp%\7z{Random characters}\{Language code}\WebCompanionInstaller.resources.dll
  • %User Temp%\7z{Random characters}\ICSharpCode.SharpZipLib.dll
  • %User Temp%\7z{Random characters}\Newtonsoft.Json.dll
  • %User Temp%\7z{Random characters}\WebCompanionInstaller.exe
  • %User Temp%\7z{Random characters}\WebCompanionInstaller.exe.config
  • %User Temp%\WcInstaller.log
  • %User Temp%\WebCompanion.zip

(Hinweis: %Application Data% ist der Ordner 'Anwendungsdaten' für den aktuellen Benutzer, normalerweise C:\Windows\Profile\{Benutzername}\Anwendungsdaten unter Windows 98 und ME, C:\WINNT\Profile\{Benutzername}\Anwendungsdaten unter Windows NT, C:\Dokumente und Einstellungen\{Benutzername}\Lokale Einstellungen\Anwendungsdaten unter Windows 2000(32-bit), XP und Server 2003(32-bit) und C:\Users\{Benutzername}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) und 10(64-bit).. %Program Files%ist der Standardordner 'Programme', normalerweise C:\Programme.. %User Temp% ist der Ordner 'Temp' des aktuellen Benutzers, normalerweise C:\Dokumente und Einstellungen\{Benutzername}\Lokale Einstellungen\Temp unter Windows 2000(32-bit), XP und Server 2003(32-bit) und C:\Users\{Benutzername}\AppData\Local\Temp unter Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) und 10(64-bit).)

Andere Details

It connects to the following possibly malicious URL:

  • http://rt.{BLOCKED}panion.com/notifications/download/rt/ActiveFeatures.zip
  • http://rt.{BLOCKED}panion.com/notifications/download/rt/postrun/prod/v1/FeatureActions.zip
  • http://sg-bitmask.{BLOCKED}e.com:443
  • http://wc-partners.{BLOCKED}ft.com/Partner.svc/GetPartnerInfo?partner={Random characters}
  • http://wc-update-service.{BLOCKED}ft.com/update.asmx
  • http://wcdownloadercdn.{BLOCKED}ft.com/7.0.2417.4248/WebCompanion-7.0.2417.4248-prod.zip
  • http://{BLOCKED}panion.com/installer/css/styles.css?{Random characters}
  • http://{BLOCKED}panion.com/version_logs?json=true&version=7.0.2417.4248
  • http://wsgeoip.{BLOCKED}ft.com/ipservice.asmx
  • http://www.{BLOCKED}panion.com/installerview/consent_2?culture=en&hp=1&se=1

  Solutions

Moteur de scan minimum: 9.800
SSAPI Pattern File: 2.409.00
SSAPI Pattern Release Date: 20 mai 2021

Step 2

Für Windows ME und XP Benutzer: Stellen Sie vor einer Suche sicher, dass die Systemwiederherstellung deaktiviert ist, damit der gesamte Computer durchsucht werden kann.

Step 3

<p> Beachten Sie, dass nicht alle Dateien, Ordner, Registrierungsschlüssel und Einträge auf Ihrem Computer installiert sind, während diese Malware / Spyware / Grayware ausgeführt wird. Dies kann auf eine unvollständige Installation oder andere Betriebssystembedingungen zurückzuführen sein. Fahren Sie mit dem nächsten Schritt fort. </ p><p> Beachten Sie, dass nicht alle Dateien, Ordner, Registrierungsschlüssel und Einträge auf Ihrem Computer installiert sind, während diese Malware / Spyware / Grayware ausgeführt wird. Dies kann auf eine unvollständige Installation oder andere Betriebssystembedingungen zurückzuführen sein. Fahren Sie mit dem nächsten Schritt fort. </ p>

Step 4

Diese Datei suchen und löschen

[ learnMore ]
Möglicherweise sind einige Komponentendateien verborgen. Aktivieren Sie unbedingt das Kontrollkästchen Versteckte Elemente durchsuchen unter Weitere erweiterte Optionen, um alle verborgenen Dateien und Ordner in den Suchergebnissen zu berücksichtigen.
  • %Application Data%\Lavasoft\Web Companion\Options\CData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\FData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\IData.txt
  • %Application Data%\Lavasoft\Web Companion\Options\Language.txt
  • %Program Files%\Lavasoft\Web Companion\Application\{Language code}\WebCompanion.resources.dll
  • %Program Files%\Lavasoft\Web Companion\Application\{Language code}\WebCompanionInstaller.resources.dll
  • %Program Files%\Lavasoft\Web Companion\Application\7za.exe
  • %Program Files%\Lavasoft\Web Companion\Application\acs17.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Ad-Aware Web Companion.exe
  • %Program Files%\Lavasoft\Web Companion\Application\BCUEngineS.dll
  • %Program Files%\Lavasoft\Web Companion\Application\BCUSDK.dll
  • %Program Files%\Lavasoft\Web Companion\Application\DotNetZip.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Esent.Interop.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Extension\@wcextensionff.xpi
  • %Program Files%\Lavasoft\Web Companion\Application\ICSharpCode.SharpZipLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.IWshRuntimeLibrary.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.LavasoftTcpServiceLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.SHDocVw.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.Shell32.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Interop.WUApiLib.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Ionic.Zip.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.adblocker.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.AppCore.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Automation.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Compression.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.CSharp.Utilities.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Events.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Extension.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.IEController.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Omni.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SearchProtect.Business.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SearchProtect.Repositories.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Settings.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.SysInfo.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Utils.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.Utils.SqlLite.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.Service.Logger.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WcfService.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe
  • %Program Files%\Lavasoft\Web Companion\Application\Lavasoft.WCAssistant.WinService.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\liblz4.dll
  • %Program Files%\Lavasoft\Web Companion\Application\log4net.dll
  • %Program Files%\Lavasoft\Web Companion\Application\LZ4.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Microsoft.mshtml.dll
  • %Program Files%\Lavasoft\Web Companion\Application\MozCompressor.dll
  • %Program Files%\Lavasoft\Web Companion\Application\NCalc.dll
  • %Program Files%\Lavasoft\Web Companion\Application\Newtonsoft.Json.dll
  • %Program Files%\Lavasoft\Web Companion\Application\System.Data.SQLite.dll
  • %Program Files%\Lavasoft\Web Companion\Application\ucrtbased.dll
  • %Program Files%\Lavasoft\Web Companion\Application\vcruntime140d.dll
  • %Program Files%\Lavasoft\Web Companion\Application\WcCommunication.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WcCommunication.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebcompaionReimageIcon.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanion.Loader.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionExtensionIE.dll
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionIcon_Pro.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionIcon.ico
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.exe
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.exe.config
  • %Program Files%\Lavasoft\Web Companion\Application\WebCompanionInstaller.pdb
  • %Program Files%\Lavasoft\Web Companion\Application\x64\SQLite.Interop.dll
  • %Program Files%\Lavasoft\Web Companion\Application\x86\SQLite.Interop.dll
  • %ProgramData%\Lavasoft\Web Companion\Logs\Webcompanion\webcompanion.log
  • %ProgramData%\Lavasoft\Web Companion\Options\ActiveFeatures.zip
  • %ProgramData%\Lavasoft\Web Companion\Options\ChannelInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\CurrentReleaseNotes.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\EventSafeguard.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\FeatureActions.zip
  • %ProgramData%\Lavasoft\Web Companion\Options\install.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\LatestReleaseNotes.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\partner.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\PerformedActions.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ProfileInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ProfileInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\ServicePartnerInfo.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\Statistics.txt
  • %ProgramData%\Lavasoft\Web Companion\Options\UpdateServer.txt
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\Lavasoft\WebCompanion\Frequently Asked Questions.url
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\Lavasoft\WebCompanion\Web Companion.lnk
  • %User Temp%\7z{Random characters}\{Language code}\WebCompanionInstaller.resources.dll
  • %User Temp%\7z{Random characters}\ICSharpCode.SharpZipLib.dll
  • %User Temp%\7z{Random characters}\Newtonsoft.Json.dll
  • %User Temp%\7z{Random characters}\WebCompanionInstaller.exe
  • %User Temp%\7z{Random characters}\WebCompanionInstaller.exe.config
  • %User Temp%\WcInstaller.log
  • %User Temp%\WebCompanion.zip

Step 5

Durchsuchen Sie Ihren Computer mit Ihrem Trend Micro Produkt, und löschen Sie Dateien, die als PUA.MSIL.WebCompanion.AE entdeckt werden. Falls die entdeckten Dateien bereits von Ihrem Trend Micro Produkt gesäubert, gelöscht oder in Quarantäne verschoben wurden, sind keine weiteren Schritte erforderlich. Dateien in Quarantäne können einfach gelöscht werden. Auf dieser Knowledge-Base-Seite finden Sie weitere Informationen.


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