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Botnet

Europol shuts down Ramnit botnet used to steal bank details

The Ramnit botnet that is said to have affected 3.2 million computers has been shut down by European police.

Nine bad botnets and the damage they did

Responsible for a great deal of the hacking, spamming and malware every day: here are some of the worst botnets of all time.

MSIL/Agent.PYO: Have botnet, will travel

ESET’s researchers recently encountered a piece of malware targeting the filling of the forms belonging to the Consulate of Poland. To understand why it is first necessary to have a brief look at the application process for visas.

Lizard Squad DDoS-for-hire service hacked – users’ details revealed

Lizard Squad failed to encrypt its database of LizardStresser’s registered users – storing details of their usernames and passwords in plaintext. A schoolboy error if ever I heard one.

XBox and PSN attacks were “marketing scheme” for Lizard Squad’s DDoS service

The attack which knocked the PlayStation Network (PSN) and Xbox Live offline over Christmas appears to have been a publicity stunt, designed to gain notoriety and draw attention to the hacking group which has claimed responsibility – Lizard Squad.

Botnet malware: What it is and how to fight it

Malware or malicious computer code has been around in some form or other for over 40 years, but the use of malware to take control of a group of computers that are then organized into something called a botnet is more a twenty-first century phenomenon.

Zeus contraataca escondido en archivos ZIP con contraseña

Falsos correos supuestamente provenientes de una empresa financiera propagan Zbot. Se trata de un “contraataque” de Zeus, la infame botnet diseñada para robar información bancaria.

GameOver Zeus and Cryptolocker: Law enforcement hits gang responsible

FBI names as “Most Wanted” the leader of cyber criminal gang based in Russia and Ukraine responsible for both GameOver Zeus and Cryptolocker schemes, as law enforcement agencies crack down on cyber crime infrastructure.

German security agency warns botnet ‘army’ has harvested 18 million emails and passwords

Scans of a huge botnet have revealed that it has harvested at least 16 million usernames and passwords for email sites and other online services, according to a report released by German security agency, the Bundesamt für Sicherheit in der Informationstechnik (BSI).

Zombie detector: Half-century-old tool may help sniff out botnets, researchers claim

A statistical tool first used in 1966 and currently used in speech and gesture recognition may hold a key to sniffing out botnets – by predicting the likely “next move” of infected PCs and the healthy computers around them, researchers have claimed.

Microsoft’s new crime-fighting super-team strikes blow against million-strong “zombie army”

Only weeks after Microsoft unveiled a global Cybercrime Center armed with new, hi-tech tools to combat crime, it announced it had carried out a global action leading to “significant disruption” of the Siferef botnet, a network controlling up to two million “zombie” PCs.

Win32/Napolar – A new bot on the block

There is a new bot on the block. ESET identifies it as Win32/Napolar while its author calls it solarbot. This piece of malware came to our attention mid-August because of its interesting anti-debugging and code injection techniques.

Microsoft liberates two million PCs from $500m cybercrime botnet

Microsoft has said that it has “liberated” two million PCs worldwide from Citadel botnets after an action on June 5 which targeted 1,400 networks.

Una amenaza, dos análisis: diferencias entre análisis estático y dinámico (parte II)

Continuando con esta serie de post, les traemos la segunda entrega de este análisis a una amenaza. Algunos días atrás les mostrábamos qué información habíamos podido obtener por medio de un análisis dinámico, pero ahora es el momento de realizar un análisis estático para ver que información se puede obtener de la amenaza. Un análisis

FBI and Microsoft break up $500 million Citadel botnet

Microsoft and the FBI have broken up a large portion of the Citadel botnet – a network which had stolen $500 million from bank accounts in 90 countries around the world by installing keylogger software on five million machines.

Mysterious Avatar rootkit with API, SDK, and Yahoo Groups for C&C communication

The mysterious Avatar rootkit, detected by ESET as Win32/Rootkit.Avatar, appears to reflect a heavy investment in code development, with an API and a SDK available, plus an interesting abuse of Yahoo Groups for C&C communications.

Gapz and Redyms droppers based on Power Loader code

Technical analysis of Power Loader, a special bot builder for making downloaders for other malware families and yet another example of specialization and modularity in malware production.

Resumen de amenazas de diciembre

Tenemos el agrado de compartir con ustedes el reporte mensual de amenazas y tendencias correspondientes a diciembre, el último mes del año. Aprovechando esta época y en conjunto con la publicación del resumen de Tendencias 2013: cambios en la propagación y ataques informáticos (parte II), hemos lanzado una tabla que resume los principales acontecimientos de

Lecciones aprendidas de GoDaddy: el poder de una botnet

Nota: Go Daddy ha emitido un comunicado oficial donde afirma que el incidente no se debió a un ataque externo de denegación de servicio. No obstante, no pudiendo confirmarse dicha información, consideramos que esta reflexión es útil de todas formas, más allá de este incidente puntual. Ya es noticia conocida que el día Lunes 10

Avances en la detección de botnets por tráfico DNS

Una de las amenazas de las que más se ha hablado en estos últimos meses es Dorkbot, una botnet con más de 80.000 bots en Latinoamérica. Las botnets son redes comprometidas con algún tipo de código malicioso, operada por una entidad criminal y que se utiliza para hacer, por ejemplo, ataques de denegación de servicio,

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