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Malware

Filecoder: Holding your data to ransom

Trojans that encrypt user files and try to extort a ransom from the victim in exchange for a decryptor utility are nothing new. We’ve noted a significant increase in Filecoder activity over the past few summer months – in this blog post we address the questions we’re getting about this issue.

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.

Can’t keep a bad man down: “Shylock” Trojan returns to attack U.S. banks

A stealthy banking Trojan known as Caphaw or Shylock has resurfaced – and is attacking customers of 24 American banks. It’s armed with defensive abilities including the power to “restore” itself during shutdown.

Poison Apple? “Kissing” picture spreads Trojan to Mac users

A picture of a smooching couple actually delivers a kiss of death to Mac OS X users – it’s a new Mac Trojan which opens a backdoor on users’ machines. It’s the second piece of Mac malware detected in a week.

“More trouble” brewing as mobile threats multiply “exponentially”, ex-ISACA chief warns

Mobile threats are becoming more complex, and more difficult to deal with as more and more devices become connected, a former vice-president of security trade body ISACA has warned.

Microsoft rushes out emergency fix for Internet Explorer after “targeted attacks”

Microsoft has released an emergency fix for a vulnerability in all versions of Internet Explorer – warning that targeted attacks are already attempting to exploit it.

“Chemical Trojans” baked into circuits could offer invisible way to steal secrets

“Hardware Trojans” could be baked invisibly into circuits by attackers, allowing them to grab secret keys from computer components without fear of detection – even by advanced inspection systems using optical microscopes.

A dream job at a luxury store? Nope – just a clever $1.5 million phishing scam

Six Nigerian men have gone on trial today in London for an alleged phishing scam where job offers at London’s exclusive Harrods department store were used as “bait”.

Tibet-targeting Mac OS malware rears its head again

A new variant on a family of Mac OS X malware which targets Tibetan activists has been found in the wild and shared on the Virus Total website, where security researchers show off new “finds”.

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.

“Dr Jekyll” apps can sneak into App Store by hiding their dark side, researchers claim

Apps with a hidden “dark side” could sneak past Apple’s approval process, according to researchers at Georgia Tech. The researchers proved this theory using a malicious app which was approved and downloaded via App Store in March this year.

YouTube download plug-ins hijack browsers to deliver malware-laced adverts

Two video plug-ins for YouTube hijack users visits to the site and insert extra adverts – some of which are being hijacked by “malvertisers”, sending users to fake adverts which attempt to infect their PCs.

Blackout warning: Philips “Smart lightbulbs” can be switched off by malware – and won’t come back on

Philips Hue lighting system is vulnerable to attacks which can cause a “perpetual blackout” in the homes of users, according to a security researcher. The Hue wireless system – on sale in Apple store – controls wireless LED light bulbs in the home via a wireless bridge, and can be controlled by iOS and Android

Stop using Windows, Tor Project advises users after malware outbreak

The Tor Project has advised users of the anonymous browser to stop using Windows, in the wake of a malware attack which exploited a Firefox vulnerability in the Tor Browser Bundle.

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