More Technical

Known unknowns – detecting rootkits under OS X

We think that there could be rootkits targeting the OS X platform, but we have very limited visibility into that threat right now. We know that we don’t know. Today, ESET is releasing a simple tool to detect rootkits on OS X.

Hesperbot – technical analysis: part 2/2

In this 3rd Hesperbot blog post we’ll look at the most intriguing part of the malware – the way it handles network traffic interception.

Hesperbot – Technical analysis part 1/2

Win32/Spy.Hesperbot is a new banking trojan that has been targeting online banking users in Turkey, the Czech Republic, Portugal and the United Kingdom. For more information about its malware spreading campaigns and victims, refer to our first blog post. In this post we’ll cover the technical details of the malware, including the overall architecture, as well as the mobile component.

Hesperbot – A New, Advanced Banking Trojan in the Wild

A new and effective banking trojan has been discovered targeting online banking users in Turkey, the Czech Republic, Portugal and the United Kingdom. It uses very credible-looking phishing-like campaigns, related to trustworthy organizations, to lure victims into running the malware.

The Powerloader 64-bit update based on leaked exploits

A few months ago on this blog I described PowerLoader functionality – including an interesting way for privilege escalation into the explorer.exe system process. The leaked PowerLoader code is also used in other malware families.

Nymaim – obfuscation chronicles

We look at malware delivered by a campaign that has infected thousands of websites around the world – and the various control flow obfuscation techniques that make its analysis as interesting as it is challenging.

Orbital Decay: the dark side of a popular file downloading tool

Orbit Downloader by Innoshock is a popular browser add-on often used to download embedded videos from sites such as YouTube. But the popular add-on has disturbing hidden functions.

Avatar rootkit: the continuing saga

In this blog post we confirm that the Avatar rootkit continues to thrive in the wild, and disclose some new information about its kernel-mode self-defense tricks. We continue our research into this malware family.

Radar Love: how classic rock helps to highlight Java problems

Java has been – and still is – one of the more problematic issues security-wise. A website showing song lyrics from Golden Earring’s Radar Love shows off problems that can leave users at the mercy of Java attacks.

Catch me if you can: Can we predict who will fall for phishing emails?

A new paper aims to profile the victims most likely to fall for a phishing attack. But what is less clear is how you develop a profile while avoiding the pitfalls of stereotyping.

Versatile and infectious: Win64/Expiro is a cross-platform file infector

Recently, our anti-virus laboratory discovered an interesting new modification of a file virus known as Expiro which targets 64-bit files for infection. File-infecting viruses are well known and have been studied comprehensively over the years, but malicious code of this type almost invariably aimed to modify 32-bit files. One such family of file viruses, called

The Home Campaign: overstaying its welcome

The Home Campaign is a malware campaign that uses a modified variant of Darkleech to direct visitors to the Blackhole exploit kit. We want to give a better idea of the size and extent of this campaign.

More malware targeting crypto-currencies: Litecoin stealing Trojan found

Bitcoin is not the only crypto-currency targeted by malware now that a Trojan designed to steal Litecoins has been discovered. In this post we review recent discoveries in malware impacting digital money.

Needles and haystacks – the art of threat attribution

ESET researchers explain the difficulties in attribution of targeted attacks; evidence is often circumstantial and the source never positively identified.

Operation Hangover: more links to the Oslo Freedom Forum incident

In our previous post on Operation Hangover, we revealed the existence of an attack group, apparently operating from within India, who were mainly targeting systems in Pakistan. In this post, we will analyze the Mac OS X samples that have been linked to this group and will provide new evidence that the Mac and Windows spywares are related.

Tax returns: Slovakian spyware campaign

ESET’s Security Research Lab details a malware-spreading campaign leveraging the deadline for tax returns in Slovakia and examines a case of infection where a bank’s two-factor authentication prevented financial loss.

Targeted information stealing attacks in South Asia use email, signed binaries

Detailed analysis of a targeted campaign that tries to steal sensitive information from different organizations throughout the world, but particularly in Pakistan.

Linux/Cdorked.A malware: Lighttpd and nginx web servers also affected

Some 400 web servers found infected with Linux/Cdorked.A. including 50 in Alexa’s top 100,000 websites. And this backdoor has been applied to Lighttpd and nginx binaries in addition to Apache.

The stealthiness of Linux/Cdorked: a clarification

We clarify that the Linux/Cdorked backdoor malware leaves no traces on the hard drive “other than its modified httpd binary” which can be scanned for detection in several ways.

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.

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