Eset desarrolló un análisis sobre el nuevo ataque de ransomware que se inició en Ucrania, y cifró información de máquinas de todo el mundo, afectando compañías de distintas industrias como bancos, red eléctrica y empresas postales, entre otras. El ransomware (secuestro de información) es el término genérico para referirse a todo tipo de software malicioso que le exige al usuario del equipo el pago de un rescate.
“El día martes un nuevo ataque de ransomware dejó en evidencia que sigue habiendo sistemas desactualizados, falta de soluciones de seguridad y de planes necesarios para evitar una infección. Los ataques continúan creciendo y evolucionando, por lo que desde Eset seguimos apostando a que la prevención y la concientización son claves para evitar ser víctimas.”, aseguró Camilo Gutierrez, jefe del Laboratorio de Eset Latinoamérica
Con el fin de despejar todas las dudas en torno a este nuevo ataque global, la compañía comparte el siguiente cuestionario:
¿Cuáles son las características de este ransomware?
Se destacan tres aspectos que lo diferencian:
Cifrado: no solo cifra los archivos con una extensión determinada, sino que además intenta cifrar, generalmente con éxito, el MBR (Master Boot Record), que es el registro principal de arranque.
Propagación: tiene la propiedad de un gusano, o sea, puede propagarse a través de diferentes técnicas por la red logrando infectar nuevos equipos.
Exploit: hace uso de ellos para explotar vulnerabilidades en equipos que no han sido actualizados o no se les han instalado los parches correspondientes.
¿Es igual de poderoso que WannaCryptor?
Ambos tienen el mismo impacto: impiden el acceso a la información almacenada en el sistema. Sin embargo, este nuevo ataque no solo cifra la información que se encuentra en los equipos, sino que, luego de que se reinicia el sistema, deja inutilizable al sistema operativo, por lo que las víctimas se ven obligadas a realizar una reinstalación.
¿Qué es lo que hace exactamente esta amenaza?
Luego de que el ransomware es ejecutado, crea una tarea programada con el fin de reiniciar el equipo en un determinado tiempo, que no suele ser más de sesenta minutos. Además, verifica si existen carpetas o discos compartidos para propagarse.
A continuación, comienza a cifrar archivos que contengan una determinada extensión. A diferencia de la mayoría del ransomware, este código malicioso no cambia o agrega una extensión particular luego de cifrar cada archivo, una técnica muy utilizada por los atacantes para distinguir a los archivos infectados.
Por último, el malware intentará eliminar los registros de eventos para no dejar rastro alguno, como también ocultar sus acciones.
¿Cómo se propaga de un país a otro? ¿Llegó a Latinoamérica?
La propagación es una característica destacable de esta amenaza. Una vez que logra infectar un equipo, intenta extraer las credenciales del usuario para luego usarlas con PsExec y WMIC para realizar una búsqueda de carpetas y discos compartidos, y así propagarse por la red a la cual el equipo esté conectado. De esta manera, logra infectar equipos situados en distintos países y regiones.
Sí, llegó a Latinoamérica, en la mayoría de los casos a equipos de empresas multinacionales conectados en red con los de otras filiales en Europa o Asia, desde las cuales se propagó con su capacidad de gusano.
¿Qué se puede hacer para evitarlo?
Tanto en hogares como en empresas, contar con una solución antivirus es imprescindible. La misma tiene que estar correctamente configurada, contemplar qué puertos están abiertos y por qué.
Además, la red debe estar configurada y segmentada correctamente, y monitorear constantemente el tráfico para detectar algún tipo de comportamiento fuera de lo normal. Es esencial realizar un estudio detallado de la información más relevante y hacer backup de la misma, para que, en caso de que se cifre, haya una forma de restaurarla.
En cuanto a las contraseñas, es primordial llevar una buena gestión de las mismas, ya que si tan solo una de las máquinas infectadas posee las credenciales de administrador, podría infectar toda la red.
Si estoy infectado y no puedo acceder al sistema, ¿cómo tendría que avanzar?
Se podrían utilizar técnicas forenses para intentar correr en memoria otro sistema operativo y de esta forma acceder a los archivos cifrados. Sin embargo, no hay mucho que se pueda hacer más que aplicar el backup, lo cual sería crucial para evitar la reinstalación del sistema operativo.
En última instancia, si no hay backup, los cibercriminales siempre ofrecerán la opción extorsiva, pero desde ESET no sugerimos de pagar el rescate ya que mientras siga siendo rentable, el ransomware continuará creciendo.
¿Cómo están operando los atacantes? ¿Esperan un pago a cambio?
El proceso para recuperar la información es el mismo al que nos tiene acostumbrado este tipo de ataques. Una vez finalizada la infección, el ransomware emite las instrucciones, en donde los atacantes solicitan un pago en bitcoins, en este caso, equivalente a 300 dólares.
Pie de imagen: Aviso de que el equipo ha sido infectado.
¿Por qué se ha vuelto tan común el secuestro de datos?
Dentro de los puntos destacables se encuentran la falta de concientización y educación a nivel seguridad que tienen muchos usuarios y empresas. Una gran parte todavía no conoce el impacto que puede tener en un modelo de negocio un ciberataque hasta que es víctima y se ve obligada a pagar para recuperar su información.
Ante esta cuestión, a pesar de la velocidad con que circulan las noticias sobre ataques informáticos y los problemas que generan, los cibercriminales encuentran una motivación importante para continuar desarrollando nuevas amenazas.
¿El ataque está armado por una persona o un grupo? ¿Se necesitan conocimientos técnicos altos?
Resulta difícil pensar que una sola persona puede estar detrás de este ataque, ya que es una amenaza que incorpora varias técnicas en cuanto a exploits, propagación, y cifrado, así como para evadir medidas de seguridad. Sin embargo, no podemos asegurar cuántas son las personas involucradas en el desarrollo de un ataque de tal magnitud.
¿Se puede dar con los autores del ataque?
No por ahora. A diferencia de una botnet, por ejemplo, no hay un Centro de Comando y Control al que se conecte la amenaza como para rastrearlo y dar con los autores; y de usarlo, seguramente sería un servidor ajeno al cual atacaron para tomar el control y accederían desde TOR, logrando anonimidad. Por otro lado, el pago del rescate se hace en bitcoins y, por las características de esta criptomoneda, se hace prácticamente imposible rastrear su destino final.
Para más información ingrese al portal de noticias de ESET llamado WeLiveSecurity en: https://www.welivesecurity.com/la-es/2017/06/29/todo-sobre-nuevo-ataque-de-ransomware/
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When we were crossing the mountain, we heard a little girl s scream coming from the woods on a side road.This Looking at the empty sky, Luo Tianhe and Luo Zhennan looked at each other.
Looking at the crowd gathered at the entrance of the store, shopkeeper Qian took the lead to take a step forward, threw his hands around and said with a smile Haha Our store reopens today.He patted Zheng Xiaoliu on the shoulder and walked out of the small stand.
Moreover, this junior s cultivation level has improved too fast and I don t want to take it anymore.and cupped his hands towards Luo Chen Thank you for taking care of Mr.
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Zhao Li hurriedly stepped forward, while Lin Tong also shot an arrow hurriedly.It is really reckless. I will send people to kill them now.
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Luo Chen wins this battle The Nangong family won the first place in this family battle, the Liu family came in second, and the Ye family came in third After the announcement, after watching Luo Chen leave the ring with inexplicable eyes, Wen Yan said in a deep voice From now on, the competition for the quota of this family battle is over, and the next step is to enter the Demon Abyss There are three Revolutionize Your Weight Loss Journey with First Choice ACV Gummies: The Ultimate Keto-Friendly Sna
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Seeing that the time is approaching, I will retreat here and refine the elixir for two consecutive days and nights.Since there are clear paths, It s not like you re trying to steal someone else s attention.
Ancestor, it has been so long, and there is still no winner.This made Ye Ling sigh secretly In the world of immortality, the strong are respected Even for Mrs.
They may even suspect Senior Brother Wang Shiyuan. That s all.It was coming with such force that he was not careful and almost died in the leopard s mouth.
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I agree Fellow Daoist Cui is right Go aside Zhou Don t think that because you are so powerful, you can ignore me.As he spoke, Ye Ling made a move with his right hand, and ordered all the monsters to jump onto the back of the giant whale, and the giant whale carried him.
It turned out to be called the Sirius Kingdom, and his map was not complete, but it was recorded on this map alone.There was no black mark unique to the monks from the Aolai Kingdom, and it was not covered up deliberately.
At this moment, five sword lights flew at the same time The leader, wearing a yellow shirt, is the Jiaomu Barbarian warrior Yu Zhongman You are here Wow, you can t run away this time, hurry up Hand over the poison proofing beads Yu Zhongman saw the monk in the moon white satin gown at the Qingzhu City Treasure Competition, currently wearing a mink fur outfit.
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He also noticed that there were two groups of monks in front of him.When they looked back, no team was following them, and they could only vaguely see a golden light in the distance.
Maybe you can avoid death. Hurry You have nothing else to do.She could not be offended for this matter. The alchemy master Ye Ling, who had an alchemy friendship with the Youyue Xianmen Ling, Feng Cai Lingyu waved her hand and said loudly Let s go The twenty monk teams took up their Revive CBD Gummies Maximum Strength: Benefits, Reviews, and Comparison
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New Longmen is just trying to let the entire Dragon Kingdom martial arts take a look at our New Longmen s swordsmanship.Sit down Seeing Mr. Bai stand up, the nephews and nephews of the Bai family at the table with him naturally stood up as well.
Chu will be embarrassed by following them. But if they don t go in today, not only will they not be able to get the documents of all parties, but they will also be treated as weak persimmons.Moreover, once the poison is triggered, there will be a surge of severe pain.
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I would also be happy to deal a blow to Ye Tianqi. However, the Qinghai Group has been hit hard.People struggle in this life. isn t it just about money, status, and reputation You have to earn your own status, but I can give you reputation.
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The opponent s swordsmanship is extremely proficient, and both speed and strength are very amazing.Why are they here Qin Feng frowned immediately, feeling disgusted with the arrival of this family.
I don t want to be messed with. When she said the last two words, she specifically glared at Qin Feng.But no matter what the reason is, these people have long lost their responsibility for the country.
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Zhang Sheng was chatting with a chubby middle aged man.Despite this, there was little noise or table banging in the office.
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Eset desarrolló un análisis sobre el nuevo ataque de ransomware que se inició en Ucrania, y cifró información de máquinas de todo el mundo, afectando compañías de distintas industrias como bancos, red eléctrica y empresas postales, entre otras. El ransomware (secuestro de información) es el término genérico para referirse a todo tipo de software malicioso que le exige al usuario del equipo el pago de un rescate.