En concreto, Emotet ha aparecido en cadenas de correo electrónico que añaden archivos .zip<\/b>, que contienen documentos adjuntos como informes de finanzas y facturas y que no cuentan con la protección de contraseñas o credenciales para su acceso.<\/p>\n\n\nNo obstante, estos documentos maliciosos <\/b>integran una notificación de Office 365 que señala que están protegidos y, una vez abiertos, solicitan a los usuarios ‘Habilitar el contenido’,<\/b> lo que descarga automáticamente el troyano.<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\tEste software <\/i>malicioso, que se ejecuta en segundo plano<\/b>, queda a la espera de comandos por parte del servidor, que puede seguir instalando otras cargas útiles en el dispositivo infectado.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\tTácticas similares pero con algunos cambios<\/b><\/h2>\nDesde hace tiempo, las campañas de Emotet se caracterizan por utilizar correos electrónicos con asuntos relacionados con facturas o presupuestos y que adjuntan ficheros ofimáticos de Microsoft Office modificados. Este tipo de campañas van especialmente dirigidas a los departamentos de administración y comercial de las empresas, acostumbrados a recibir correos similares todos los días y que pueden ser mas propensos a abrir y ejecutar los ficheros maliciosos.<\/p>\nEn esta nueva campaña se ha detectado como los delincuentes siguen usando esta técnica, adjuntando ficheros comprimidos en formato ZIP <\/b>y que se hacen pasar por supuestas facturas.<\/p>\nSin embargo, para esta nueva campaña los delincuentes han usado una técnica utilizada por otros malware como el troyano<\/a> bancario Grandoreiro<\/b> que consiste en inflar el tamaño del archivo una vez descomprimido para así tratar de evitar la detección estática por parte de los antivirus<\/a> cuando el documento se guarda en el disco. En un testeo del ataque vemos como de un fichero de unos pocos Kilobytes se pasa a más de 550 Megabytes<\/b> cuando se procede a descomprimirlo.<\/p>\nEl fichero resultante es un documento de MS Word que no pocos usuarios se van a ver tentados de abrir para comprobar si realmente hay una factura en su interior. No obstante, lo que se van a encontrar en su interior es un aviso indicando que el documento se encuentra protegido y que es necesario habilitar la opción habilitar el contenido para poder mostrarlo.<\/p>\nLo que si que no cambia es la forma de atacar de un troyano, una vez esta dentro del sistema el daño puede ser irreparable <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\n\t\t\t\t\t<\/video>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"Compte amb els documents maliciosos de l'Office 365 que assenyalen que estan protegits i sol\u00b7liciten a "Habilitar el contingut".<\/p>","protected":false},"author":2,"featured_media":7788,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[39],"tags":[74,133,27,128],"class_list":["post-7787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","tag-concienciacion","tag-emotet","tag-malware","tag-troyano","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"Vuelve Emotet, el troyano bancario m\u00e1s avanzado y autopropagable - Infordisa \/ Security Operations Center<\/title>\n<meta name=\"description\" content=\"Cuidado con los documentos maliciosos de Office 365 que se\u00f1alan que est\u00e1n protegidos y solicitan a "Habilitar el contenido".\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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Este software <\/i>malicioso, que se ejecuta en segundo plano<\/b>, queda a la espera de comandos por parte del servidor, que puede seguir instalando otras cargas útiles en el dispositivo infectado.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\tTácticas similares pero con algunos cambios<\/b><\/h2>\nDesde hace tiempo, las campañas de Emotet se caracterizan por utilizar correos electrónicos con asuntos relacionados con facturas o presupuestos y que adjuntan ficheros ofimáticos de Microsoft Office modificados. Este tipo de campañas van especialmente dirigidas a los departamentos de administración y comercial de las empresas, acostumbrados a recibir correos similares todos los días y que pueden ser mas propensos a abrir y ejecutar los ficheros maliciosos.<\/p>\nEn esta nueva campaña se ha detectado como los delincuentes siguen usando esta técnica, adjuntando ficheros comprimidos en formato ZIP <\/b>y que se hacen pasar por supuestas facturas.<\/p>\nSin embargo, para esta nueva campaña los delincuentes han usado una técnica utilizada por otros malware como el troyano<\/a> bancario Grandoreiro<\/b> que consiste en inflar el tamaño del archivo una vez descomprimido para así tratar de evitar la detección estática por parte de los antivirus<\/a> cuando el documento se guarda en el disco. En un testeo del ataque vemos como de un fichero de unos pocos Kilobytes se pasa a más de 550 Megabytes<\/b> cuando se procede a descomprimirlo.<\/p>\nEl fichero resultante es un documento de MS Word que no pocos usuarios se van a ver tentados de abrir para comprobar si realmente hay una factura en su interior. No obstante, lo que se van a encontrar en su interior es un aviso indicando que el documento se encuentra protegido y que es necesario habilitar la opción habilitar el contenido para poder mostrarlo.<\/p>\nLo que si que no cambia es la forma de atacar de un troyano, una vez esta dentro del sistema el daño puede ser irreparable <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\n\t\t\t\t\t<\/video>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"Compte amb els documents maliciosos de l'Office 365 que assenyalen que estan protegits i sol\u00b7liciten a "Habilitar el contingut".<\/p>","protected":false},"author":2,"featured_media":7788,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[39],"tags":[74,133,27,128],"class_list":["post-7787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","tag-concienciacion","tag-emotet","tag-malware","tag-troyano","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"Vuelve Emotet, el troyano bancario m\u00e1s avanzado y autopropagable - Infordisa \/ Security Operations Center<\/title>\n<meta name=\"description\" content=\"Cuidado con los documentos maliciosos de Office 365 que se\u00f1alan que est\u00e1n protegidos y solicitan a "Habilitar el contenido".\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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Desde hace tiempo, las campañas de Emotet se caracterizan por utilizar correos electrónicos con asuntos relacionados con facturas o presupuestos y que adjuntan ficheros ofimáticos de Microsoft Office modificados. Este tipo de campañas van especialmente dirigidas a los departamentos de administración y comercial de las empresas, acostumbrados a recibir correos similares todos los días y que pueden ser mas propensos a abrir y ejecutar los ficheros maliciosos.<\/p>\n
En esta nueva campaña se ha detectado como los delincuentes siguen usando esta técnica, adjuntando ficheros comprimidos en formato ZIP <\/b>y que se hacen pasar por supuestas facturas.<\/p>\n
Sin embargo, para esta nueva campaña los delincuentes han usado una técnica utilizada por otros malware como el troyano<\/a> bancario Grandoreiro<\/b> que consiste en inflar el tamaño del archivo una vez descomprimido para así tratar de evitar la detección estática por parte de los antivirus<\/a> cuando el documento se guarda en el disco. En un testeo del ataque vemos como de un fichero de unos pocos Kilobytes se pasa a más de 550 Megabytes<\/b> cuando se procede a descomprimirlo.<\/p>\nEl fichero resultante es un documento de MS Word que no pocos usuarios se van a ver tentados de abrir para comprobar si realmente hay una factura en su interior. No obstante, lo que se van a encontrar en su interior es un aviso indicando que el documento se encuentra protegido y que es necesario habilitar la opción habilitar el contenido para poder mostrarlo.<\/p>\nLo que si que no cambia es la forma de atacar de un troyano, una vez esta dentro del sistema el daño puede ser irreparable <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\n\t\t\t\t\t<\/video>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"Compte amb els documents maliciosos de l'Office 365 que assenyalen que estan protegits i sol\u00b7liciten a "Habilitar el contingut".<\/p>","protected":false},"author":2,"featured_media":7788,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[39],"tags":[74,133,27,128],"class_list":["post-7787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","tag-concienciacion","tag-emotet","tag-malware","tag-troyano","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"Vuelve Emotet, el troyano bancario m\u00e1s avanzado y autopropagable - Infordisa \/ Security Operations Center<\/title>\n<meta name=\"description\" content=\"Cuidado con los documentos maliciosos de Office 365 que se\u00f1alan que est\u00e1n protegidos y solicitan a "Habilitar el contenido".\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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El fichero resultante es un documento de MS Word que no pocos usuarios se van a ver tentados de abrir para comprobar si realmente hay una factura en su interior. No obstante, lo que se van a encontrar en su interior es un aviso indicando que el documento se encuentra protegido y que es necesario habilitar la opción habilitar el contenido para poder mostrarlo.<\/p>\n
Lo que si que no cambia es la forma de atacar de un troyano, una vez esta dentro del sistema el daño puede ser irreparable <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
Compte amb els documents maliciosos de l'Office 365 que assenyalen que estan protegits i sol\u00b7liciten a "Habilitar el contingut".<\/p>","protected":false},"author":2,"featured_media":7788,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[39],"tags":[74,133,27,128],"class_list":["post-7787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","tag-concienciacion","tag-emotet","tag-malware","tag-troyano","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":[],"yoast_head":"
![\"\"](\"https:\/\/www.infordisa.com\/soc\/wp-content\/uploads\/2023\/03\/Habilitar-contenido-1024x543.jpg\")
\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t![\"😓\"](\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f613.svg\"\/)
<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t