Analisado por: Mark Joseph Manahan   
 

Trojan.Zeroaccess.C (Symantec), Backdoor.Win32.ZAccess.evyo (Kaspersky), Win32/Sirefef.FY trojan (Eset)

 Plataforma:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 Classificao do risco total:
 Potencial de dano:
 Potencial de distribuição:
 infecção relatada:
 Exposição das informações:
Baixo
Medium
Alto
Crítico

  • Tipo de grayware:
    Backdoor

  • Destrutivo:
    Não

  • Criptografado:
     

  • In the Wild:
    Sim

  Visão geral


  Detalhes técnicos

Tipo de compactação: 252,928 bytes
Tipo de arquivo: EXE
Residente na memória: Sim
Data de recebimento das amostras iniciais: 26 novembro 2013

Installation

Schleust die folgenden Eigenkopien in das betroffene System ein und führt sie aus:

  • %AppDataLocal%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\GoogleUpdate.exe
  • %Program Files%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\GoogleUpdate.exe

(Hinweis: %Program Files%ist der Standardordner 'Programme', normalerweise C:\Programme.)

Schleust folgende Komponentendateien ein:

  • %AppDataLocal%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\@ - configuration file
  • %Program Files%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\@ - configuration file

(Hinweis: %Program Files%ist der Standardordner 'Programme', normalerweise C:\Programme.)

Autostart-Technik

Fügt folgende Registrierungseinträge hinzu, um bei jedem Systemstart automatisch ausgeführt zu werden.

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Google Update = ""%AppDataLocal%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\GoogleUpdate.exe" >"

Registriert sich als Systemdienst, damit die Ausführung bei jedem Systemstart automatisch erfolgt, indem die folgenden Registrierungsschlüssel hinzufügt werden:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
Start = "2"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
Type = "10"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
ErrorControl = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
ImagePath = "%Program Files%\Google\Desktop\Install\{GUID}\{unprintable characters 1}\{unprintable characters 2}\{RLO Unicode}{unprintable characters 3}\{GUID}\GoogleUpdate.exe"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
Description = "Keeps your Google software up to date. If this service is disabled or stopped, your Google software will not be kept up to date, meaning security vulnerabilities that may arise cannot be fixed and features may not work. This service uninstalls itself when there is no Google software using it."

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{RLO Unicode}etadpug
DisplayName = Google Update Service (gupdate)

Andere Systemänderungen

Löscht die folgenden Registrierungsschlüssel:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wscsvc

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wuauserv

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\BITS

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess

  Solução

Mecanismo de varredura mínima: 9.700
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