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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Looking at Jin Zan who was looking for a disposable cup, Du Heng lay comfortably on the chair, deeply After taking a few breaths, he stood up again and picked up the pen and paper he had just used.I originally thought that Du Heng was a reliable person, but I didn t expect that he was also a talkative person.
He is very afraid of death. He must have his own needs to do such a thing.Third, her husband is a public official, and his position is not low, so she has to worry about her husband s future.
He said he wanted to cure him. Can I disagree So, I am doing the same.The main reason was that he came out early in the morning and just ate a steamed bun without taking any water.
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Now it hurts stomach qi, which aggravates the situation, so I have no appetite even more, and I don t want to eat.All kinds of precious instruments in hospitals were being fiddled with in this spacious bedroom, and the patients were slowly getting closer and closer amidst the busyness of the people around them.
Gong Daoyang s face turned even colder. Du Fei s words were almost the same as his thoughts.Jin Zan saw Du Heng straighten up and asked again, How are you doing Are you sure Du Heng breathed out slowly, The reset technique can work.
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Du Heng carefully looked at Section Chief Song s expression, then looked at the tongue coating, and felt that Section Chief Song Feeling a little hot, he asked, Is there anything uncomfortable Section Chief Song thought for a moment, Every time after drinking the medicine, my body always feels very hot.
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Xu Yang guessed right, this fire lotus is the anger of the Buddhist Fudo King Ming, and it has changed under the sacrifice of the old monk.The magic bell was not bad En Chrissy Metz Weight Loss Journey How She Shed Pounds And Transformed Her Body X8e0 Tb4pld either.She sacrificed a red orb to emit a scorching shield, and the surrounding ghost energy immediately hissed and burned away.
After the death of the golden sword worms, a devouring law merged into the Dutian Banner, and at the same time, a huge aura and a sword pillar that reached the sky also merged into the Dutian Banner, making the Banner reborn.Now the world of cultivating immortals in Yongzhou is full of jitters.
A flash of five color light shot straight at the opponent, and at the same time Xu Yang s whole body shook, and a large number of five color light needles emerged out of thin air, whizzing and lasing at the setting sun demon, it was the terrifying Great Five Elements Extinction Light Needle.With a flash of his figure, Xu Yang broke through the black hole of nothingness with the power of the small world and left.
His heart was shocked, and he quickly bowed and said, I have passed the two seniors twice.With a click, the ghost gate was broken again, and then quickly reorganized and continued to attack, which made the blood ghost king very annoyed.
Fortunately, the power of the backlash of the law has also dropped greatly, Xu Yang mobilized the power of the small world to easily take it away.Daoist Taiyin threw the jade book into Xu Yang s hands, and he said with a serious face This is the treasure of wealth in this pavilion, and you can learn from it here for the next three days The old man will close Langhuan Blessed Land, Open it in three days.
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Xu Yang s eyes lit up, and he found a shortcut to upgrade the small world, but now is not the time, let s kill the Sunset Demon Lord first Thinking of this, Xu Yang quickly absorbed the aura of the surrounding earth veins to restore his state.I wonder what Senior Jinlong wants Xu Yang admitted directly, and after he finished speaking, he secretly mobilized the power of the Small World, ready to strike the sky at any time.
The law of fire is so hot that the divine sense cannot directly comprehend it.He walked forward first, and Huan Ling er slowly followed behind.
Xu Yang Immediately hit hard by it.But Xu Daozi was also having a hard time, forcibly opening the seal caused him to suffer a lot of backlash, and the Heavenly Dao of the Tian Yuan Realm also En Jesse Plemons Weight Loss Strategies Behind The 49yi0p9 Transformation Clgd sensed his changes, and the chains of Dao Dao appeared in the sky, winding towards him like a boa constrictor.
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After all, the world hadn t fully evolved yet, and the Heavenly Dao Beads were only temporarily condensed.I went to the organ city with fellow Daoist Gongshu.
These Yuanying elders are all elites of Wanbao Pavilion.With their power, no treasure can be found, and a mere treasure is not worth mentioning.
Once the illusion collapsed, Shinansheng would wake up.It seems that the status of immortal cultivators here is also low Very high, so the other disciples of the sect should be fine, and the three of Senior Brother Bai don t have to worry about it Thinking of this, Xu Yang felt relieved, it seemed that they were all trapped here and couldn t get out so they lost contact, and he had to find them as soon as possible Try to return to the outside world, otherwise it will be bad if something happens to the sect.
He turned his head to look at the battlefield, and saw that a dozen or so infant ghost monks were about to suppress the ghost beasts, but the ghost beasts roared again and again, but they were powerless.After that, Dutian Banner buzzed and disappeared in a flash.
The giant face opened its mouth and inhaled, and the demonic energy from the surrounding areas was sucked into its mouth.Wang Lin s complexion changed slightly and he flew into the Golem.
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Junior Sister Yu Liao, I think your three apprentices are very good.Tripzi, I m worried.no, it s the master who worries about you, little junior sister.
She wanted to suppress the wound on his abdomen, but blood gushed out, and her spells couldn t suppress it at all.Seeing how dependent she was in his arms, and the red marks all over her body under the quilt as if condemning his insubordination, Qin Su said sorry in his heart.
He mumbled his lips and said with a trembling voice Master Taoist, Lord Taoist, be careful what you have on your hands.Something is wrong, it seems that I was led away by him without knowing it.
He raised his eyes and looked at Gu Jia who was getting closer.And the rare pedantic and awe inspiring aura without the right way, no longer believing that as long as the demons are captured, she can avoid the gossip of the teacher, and she doesn t seem to believe in the right way so completely, it s getting more and more interesting.
Yu Liao slightly raised her head to look at the two people above, stepped on the sword and smiled slightly at their joy, slightly raised her hand and pulled Tan Su s sleeve, and brought him behind her, soaring up into the air.Not to mention that most monks have already fasted the grain, even if it is drinking water, this condition needs to be started by someone very close to them.
After noon, Yu Liao woke up faintly.She poked her head out of Tan Su s arms, stretched out her hand and pulled the quilt down, and only then did she feel that her breathing became easier.It turned out that it was a sword box.Ah Su, try it out, if it s not suitable, there are other things.
She has a faint guess in her heart, but she is not completely sure at this time.The two masters and apprentices tacitly continued to approach each other with spiritual power, and Qin Su even got closer and wanted to tear off his black cloth mask.
While helping them, Yu Liao s fingertips quietly probed down their spiritual veins, and the younger sister found out that it was an ordinary person.This blow was obviously different from the previous one.
They only need to use a little spiritual power on the top, and the words spoken by the people below will fall into their ears exactly.Tan Su also fell to the ground with him.Seeing that he still chose to suppress the demon clan s fierce pressure, and seeing him wiping the blood from the corners of his lips with his sleeves raised, Qin Su suppressed the vibrating strings in the next moment, and said indifferently You re nothing, I have nothing to hide.
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At that time, he was still afraid of this height.Thinking of this, he glanced at Tan Su who was beside him.You also think that senior brother will not hand it over to me again, right I won t leave the borderline in my hands.
I don t know how the investigations of the few disciples who came earlier are doing.It s been fifteen years.Do you know that your parents haven t entered the way of death yet They died tragically.
In the end, the head of Wugou Mountain and the head of Gufan Mountain were the main ones, and the two ended with the beautiful imagination of everyone s reunion in the next five years.After speaking, he carefully rubbed his hands on his knees, trying to relieve the pain.
Master, I am not a child who has just entered the critical stage now.She was tall and tall and was a very young mother, but at this moment her face was pale, and she was weak and needed the help of a maid next to her.
However, the relationship between the two is becoming more and more normal, as normal as living at home.After a long while, she said with great reluctance, Once in twenty days is fine, if not, then fifteen days, no more.
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It is best to remove the gauze tomorrow and change the dressing for the second time.Is it stressful at home to study for a bachelor s degree and a master s degree together It s not bad, the tuition in Qingbei is not expensive, and there are scholarships.
Regardless of his relationship, it seemed to have nothing to do with him.Why are you so free and still have time to check Moments Forget the gossip, I m still busy.
My idea is that you give these students a training class for the professional examination, and let them continue to study for two to three hours after get off work every day.He rested for a long time and after feeling a little relieved, he immediately drove down to Zhuang Qigang s home.
Du Heng felt very unhappy when he heard his elder brother s questioning.He can speak out internally, and Dong Yuezhang and Gong Daoyang are nearby to help externally, and An Chunhui, the boss, is sitting in front of him.
An arm was pressed under her body and squeezed together with the car door step, but the crushing damage, don t you think is too exaggerated What s more, judging from the thickness of her arms, her weight is definitely not more than 60 kilograms.It seemed that Wu Buwei had already The medicine was delivered.
I will keep rescuing him, but still There was nothing I could do, my chest was completely broken.Plastic surgery hospital. Is the formula your own It s my own.
The needle, the cry became louder, and the hand retracted more obviously.When Du Heng heard the students passing by him in twos and threes laughing wantonly and making joyful noises, Du Heng suddenly felt that he was getting older.
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Just because I wasn t injured doesn t mean I didn t work hard.When Du Heng squeezed to the door, he was stuck outside the last layer of the wall.
Zhou feel a little more worried. What is Du Heng s level As a partner, she must have She has a full understanding of the treatment of several critically ill and cancer patients, plus her own personal experience.If the problem of Qi deficiency is not solved, we will wait for a while.
At this time, when I heard Cao Binghe ask himself, he turned around and asked Cao Binghe a question, Does Dr.She has to cherish her own life, right Don t say it, the girl s His driving skills were very good, and he safely returned the three of them to the door of Qi Gang s house.
Knowing that he had met someone who understood today and nothing could be done, he picked up his things and left.Only then did everyone remember that Lan Changhua had just been shocked.
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.