PE_SALITY

Publish Date: 18 de lutego de 2014

Author: Dianne Lagrimas

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

OVER ALL RISK RATING:

DAMAGE POTENTIAL::

DISTRIBUTION POTENTIAL::

REPORTED INFECTION:

Low

Medium

High

Critical

Threat Type:
File infector
Destructiveness:
No
Encrypted:
In the wild::
Yes

OVERVIEW

INFECTION CHANNEL: Infecta archivos, Se propaga vía unidades extraíbles, Se propaga vía redes compartidas, Descargado de Internet

TECHNICAL DETAILS

Memory resident: Yes

PAYLOAD: Connects to URLs/IPs, Modifies HOSTS file, Terminates processes

Instalación

Infiltra los archivos siguientes:

%System%\vcmgcd32.dll
%System%\vcmgcd32.dl_
{drive letter}:\ autorun.inf
%System%\drivers\{random file name}.sys

(Nota: %System% es la carpeta del sistema de Windows, que en el caso de Windows 98 y ME suele estar en C:\Windows\System, en el caso de Windows NT y 2000 en C:\WINNT\System32 y en el caso de Windows XP y Server 2003 en C:\Windows\System32).

)

Crea las siguientes copias de sí mismo en el sistema afectado:

{drive letter}:\{random}.exe/cmd/pif
{drive letter}:\{malware file name}.exe

Otras modificaciones del sistema

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_CURRENT_USER\Software\{random}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Tracing\FWCFG

Agrega las siguientes entradas de registro:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
system
DisableRegistryTools = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
system
DisableTaskMgr = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
AntiVirusDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
AntiVirusOverride = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
FirewallDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
FirewallOverride = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
UacDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center\Svc
UpdatesDisableNotify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSetServices\
SharedAccess\ParametersFirewallPolicy\StandardProfile
DisableNotifications = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSetServices\
SharedAccess\ParametersFirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSetServices\
SharedAccess\ParametersFirewallPolicy\StandardProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile\AuthorizedApplications\
List
{malware path and name} = "{malware path and name}:*:Enabled:{infected file name}"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path and name} = "{malware path and name}:*:Enabled:ipsec"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\{random}
DisplayName = "{random}"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\{random}
ErrorControl = "1"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\{random}
ImagePath = "\??\%System%\drivers\{random file name}.sys"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\{random}
Start = "3"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\{random}
Type = "1"

Este malware modifica la(s) siguiente(s) entrada(s)/clave(s) de registro como parte de la rutina de instalación:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "2"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess
Start = "4"

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UpdatesDisableNotify = "1"