TROJ_TEERAC.B
Ransom:Win32/Teerac.C (Microsoft); RDN/Ransom!el (McAfee); Backdoor.Trojan (Symantec); Trojan-Ransom.Win32.Foreign.lgqc (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Win32/Cryptor (AVG)
Windows
Threat Type:
Trojan
Destructiveness:
No
Encrypted:
In the wild::
Yes
OVERVIEW
TECHNICAL DETAILS
Instalación
Crea las carpetas siguientes:
- %User Profile%\Application Data\uluxohydelujynyf
(Nota: %User Profile% es la carpeta de perfil del usuario activo, que en el caso de Windows 98 y ME suele estar en C:\Windows\Profiles\{nombre de usuario}, en el caso de Windows NT en C:\WINNT\Profiles\{nombre de usuario} y en el caso de Windows 2000, XP y Server 2003 en C:\Documents and Settings\{nombre de usuario}).
)Técnica de inicio automático
Agrega las siguientes entradas de registro para permitir su ejecución automática cada vez que se inicia el sistema:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
ozgtelok = "%Windows%\uzwlurel.exe"
Otras modificaciones del sistema
Modifica las siguientes entradas de registro:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.imaadpcm
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.imaadpcm
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.imaadpcm
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.imaadpcm
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msadpcm
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msadpcm
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msadpcm
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msadpcm
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg711
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg711
cFormatTags = "3"
(Note: The default value data of the said registry entry is 3.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg711
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg711
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msgsm610
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msgsm610
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msgsm610
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msgsm610
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.trspch
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.trspch
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.trspch
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.trspch
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg723
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg723
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg723
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msg723
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msaudio1
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msaudio1
cFormatTags = "3"
(Note: The default value data of the said registry entry is 3.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msaudio1
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.msaudio1
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.sl_anet
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.sl_anet
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.sl_anet
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.sl_anet
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.iac2
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.iac2
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.iac2
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.iac2
cFilterTags = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.l3acm
fdwSupport = "1"
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.l3acm
cFormatTags = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.l3acm
aFormatTagCache = "{random values}"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AudioCompressionManager\DriverCache\msacm.l3acm
cFilterTags = "0"
Rutina de infiltración
Infiltra los archivos siguientes:
- %User Profile%\uluxohydelujynyf\01000000
- %Windows%\uzwlurel.exe
- %User Profile%\uluxohydelujynyf\02000000
- %User Profile%\uluxohydelujynyf\00000000
(Nota: %User Profile% es la carpeta de perfil del usuario activo, que en el caso de Windows 98 y ME suele estar en C:\Windows\Profiles\{nombre de usuario}, en el caso de Windows NT en C:\WINNT\Profiles\{nombre de usuario} y en el caso de Windows 2000, XP y Server 2003 en C:\Documents and Settings\{nombre de usuario}).
. %Windows% es la carpeta de Windows, que suele estar en C:\Windows o C:\WINNT).)
SOLUTION
Step 1
Los usuarios de Windows ME y XP, antes de llevar a cabo cualquier exploración, deben comprobar que tienen desactivada la opción Restaurar sistema para permitir la exploración completa del equipo.
Step 2
Reiniciar en modo seguro
Step 3
Eliminar este valor del Registro
Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- ozgtelok = "%Windows%\uzwlurel.exe"
Step 4
Restaurar este valor del Registro modificado
Importante: si modifica el Registro de Windows incorrectamente, podría hacer que el sistema funcione mal de manera irreversible. Lleve a cabo este paso solo si sabe cómo hacerlo o si puede contar con ayuda de su administrador del sistema. De lo contrario, lea este artículo de Microsoft antes de modificar el Registro del equipo.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.imaadpcm
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.imaadpcm
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.imaadpcm
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.imaadpcm
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msadpcm
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msadpcm
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msadpcm
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msadpcm
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg711
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg711
- From: cFormatTags = "3"
To: cFormatTags = ""3""
- From: cFormatTags = "3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg711
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg711
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msgsm610
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msgsm610
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msgsm610
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msgsm610
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.trspch
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.trspch
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.trspch
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.trspch
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg723
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg723
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg723
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msg723
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msaudio1
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msaudio1
- From: cFormatTags = "3"
To: cFormatTags = ""3""
- From: cFormatTags = "3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msaudio1
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.msaudio1
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.sl_anet
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.sl_anet
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.sl_anet
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.sl_anet
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.iac2
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.iac2
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.iac2
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.iac2
- cFilterTags = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.l3acm
- From: fdwSupport = "1"
To: fdwSupport = ""1""
- From: fdwSupport = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.l3acm
- From: cFormatTags = "2"
To: cFormatTags = ""2""
- From: cFormatTags = "2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.l3acm
- From: aFormatTagCache = "{random values}"
To: aFormatTagCache = ""{random values}""
- From: aFormatTagCache = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AudioCompressionManager\DriverCache\msacm.l3acm
- cFilterTags = "0"
Step 5
Buscar y eliminar estos archivos
- %User Profile%\uluxohydelujynyf\01000000
- %Windows%\uzwlurel.exe
- %User Profile%\uluxohydelujynyf\02000000
- %User Profile%\uluxohydelujynyf\00000000
Step 6
Buscar y eliminar esta carpeta
- %User Profile%\Application Data\uluxohydelujynyf
Step 7
Reinicie en modo normal y explore el equipo con su producto de Trend Micro para buscar los archivos identificados como TROJ_TEERAC.B En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.
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