VB Blog

Necurs pump-and-dump spam campaign pushes obscure cryptocurrency

Posted by   Martijn Grooten on   Jan 16, 2018

A Necurs pump-and-dump spam campaign pushing the lesser known Swisscoin botnet is mostly background noise for the Internet.

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Alleged author of creepy FruitFly macOS malware arrested

Posted by   Martijn Grooten on   Jan 11, 2018

A 28-year old man from Ohio has been arrested on suspicion of having created the mysterious FruitFly malware that targeted macOS and used it to spy on its victims.

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The threat and security product landscape in 2017

Posted by   Martijn Grooten on   Jan 10, 2018

At the start of the new year, Virus Bulletin looks back at the threats seen in the 2017 and at the security products that are available to help mitigate them.

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Spamhaus report shows many botnet controllers look a lot like legitimate servers

Posted by   Martijn Grooten on   Jan 9, 2018

Spamhaus's annual report on botnet activity shows that botherders tend to use popular, legitimate hosting providers, domain registrars and top-level domains when setting up command-and-control servers.

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Tips on researching tech support scams

Posted by   Martijn Grooten on   Jan 5, 2018

As tech support scammers continue to target the computer illiterate through cold calling, VB's Martijn Grooten uses his own experience to share some advice on how to investigate such scams.

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Meltdown and Spectre attacks mitigated by operating system updates

Posted by   Martijn Grooten on   Jan 4, 2018

Just four days into the new year, two serious attacks in modern processors, dubbed Meltdown and Spectre, have been discovered. The attacks can be mitigated by patches to the operating system, but anti-virus software vendors need to make sure their products are compatible with the patches.

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Conference review: AVAR 2017

Posted by   Martijn Grooten on   Dec 22, 2017

Martijn Grooten reports on the 20th AVAR conference, which took place earlier in December in Beijing, China.

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Conference review: Botconf 2017

Posted by   Virus Bulletin on   Dec 22, 2017

Virus Bulletin researchers report back from a very interesting fifth edition of Botconf, the botnet fighting conference.

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VB2017 videos on attacks against Ukraine

Posted by   Martijn Grooten on   Dec 21, 2017

(In)security is a global issue that affects countries around the world, but in recent years none has been so badly hit as Ukraine. Today, we publish the videos of two VB2017 talks about attacks that hit Ukraine particularly badly: a talk by Alexander Adamov (NioGuard) on (Not)Petya and related attacks, and another by Robert Lipovsky and Anton Cherepanov (ESET) on Industroyer.

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Facebook helps you determine whether emails really came from its servers

Posted by   Martijn Grooten on   Dec 21, 2017

On its website, Facebook now shows which emails it has sent you recently, thus helping you to determine which emails are real, and which should be discarded as phishing.

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Emotet continues to bypass many email security products

Having returned from a summer hiatus, Emotet is back targeting inboxes and, as seen in the VBSpam test lab, doing a better job than most other malicious campaigns at bypassing email security products.
Emails with a malicious link or attachment form only a small minority of the spam that is sent every day. If it appears that such emails are more common than that, it is not just… https://www.virusbulletin.com/blog/2019/11/emotet-continues-bypass-many-email-security-products/

Stalkerware poses particular challenges to anti-virus products

Malware used in domestic abuse situations is a growing threat, and the standard way for anti-virus products to handle such malware may not be good enough. But that doesn't mean there isn't an important role for anti-virus to play.
Did you know that October has been Cyber Security Awareness Month? Of course you did ─ it has been pretty hard to avoid it. But did you know that it has also, at least in the… https://www.virusbulletin.com/blog/2019/10/stalkerware-poses-particular-challenges-anti-virus-products/

New Emotet spam campaign continues to bypass email security products

On Monday, the infamous Emotet malware resumed its spam campaign to spread the latest version of the malware. As before, the malware successfully bypasses many email security products.
Following the resumption of activity by Emotet's C&C servers in August, it was only a matter of time before the botnet started sending out spam again. This did indeed happen on… https://www.virusbulletin.com/blog/2019/09/new-emotet-spam-campaign-continues-bypass-email-security-products/

The malspam security products miss: Emotet, Ursnif, and a spammer's blunder

The set-up of the VBSpam test lab gives us a unique insight into the kinds of emails that are more likely to bypass email filters. This week we look at the malspam that was missed: a very international email with a link serving Emotet, an Italian Ursnif c…
This blog post was put together in collaboration with VB test engineers Adrian Luca and Ionuţ Răileanu. Virus Bulletin uses email feeds provided by Abusix and Project Honey Pot.… https://www.virusbulletin.com/blog/2019/02/malspam-security-products-miss-emotet-ursnif-and-spammers-blunder/

From Amazon to Emotet: a look at those phishing and malware emails that bypassed email security products

We see a lot of spam in the VBSpam test lab, and we also see how well such emails are being blocked by email security products. Recently some of the emails that bypassed security products included a broken Amazon phishing campaign, a large fake UPS campai…
This blog post was put together in collaboration with VB test engineers Adrian Luca and Ionuţ Răileanu. On this blog, we regularly look at those phishing and malware emails… https://www.virusbulletin.com/blog/2019/02/amazon-ups-emotet-formbook-and-lokibot-look-those-phishing-and-malware-emails-bypassed-email-security-products/

From HSBC to product descriptions: the malicious emails bypassing your filters

Using data from our VBSpam lab, we looked at the malicious emails that have been missed recently by a large number of email security products.
Over a one-week period earlier this month, the average email with a malicious attachment was almost three times as likely to bypass email security products than a spam email… https://www.virusbulletin.com/blog/2019/01/hsbc-product-descriptions-malicious-emails-bypassing-your-filters/

VB2018 paper: Inside Formbook infostealer

The Formbook information-stealing trojan may not be APT-grade malware, but its continuing spread means it can still be effective. At VB2018 in Montreal, Gabriela Nicolao, a researcher from Deloitte in Argentina, presented a short paper in which she looked…
The Formbook information-stealing trojan has been spread by a number of recent spam campaigns. The malware was advertised in hacking forums as long ago as January 2016, but wasn't… https://www.virusbulletin.com/blog/2019/01/vb2018-paper-inside-formbook-infostealer/

VB2018 paper: From Hacking Team to hacked team to…?

Today we publish the VB2018 paper and video by ESET researcher Filip Kafka, who looked at the new malware by Hacking Team, after the company had recovered from the 2015 breach.
It is good practice not to mock or laugh at hacking victims. But when the victim is a company that itself is in the business of hacking and has a habit of selling its products and… https://www.virusbulletin.com/blog/2019/01/vb2018-paper-hacking-team-hacked-team/

The spam that is hardest to block is often the most damaging

We see a lot of spam in the VBSpam test lab, and we also see how well such emails are being blocked by email security products. Worryingly, it is often the emails with a malicious attachment or a phishing link that are most likely to be missed.
This blog post was put together in collaboration with VB test engineers Adrian Luca and Ionuţ Răileanu. In a talk I gave at IRISSCON last year (the video of which you will find… https://www.virusbulletin.com/blog/2019/01/spam-hardest-block-often-most-damaging/

VB2018 paper: Unpacking the packed unpacker: reversing an Android anti-analysis library

Today, we publish a VB2018 paper by Google researcher Maddie Stone in which she looks at one of the most interesting anti-analysis native libraries in the Android ecosystem. We also release the recording of Maddie's presentation.
Though still relatively new (the first VB conference paper on Android malware was presented in 2011), malware targeting the Android mobile operating system has evolved quickly, in… https://www.virusbulletin.com/blog/2019/01/vb2018-paper-unpacking-packed-unpacker-reversing-android-anti-analysis-library/

VB2018 preview: Anatomy of an attack: detecting and defeating CRASHOVERRIDE

In today's blog post, we preview the VB2018 paper by Dragos Inc.'s Joe Slowik, who looks at the CRASHOVERRIDE malware, the first (publicly known) malware designed to impact electric grid operations.
One of the many highlights of last year's Virus Bulletin Conference was a last-minute paper by ESET researchers Anton Cherepanov and Robert Lipovsky on Industroyer, 'the first… https://www.virusbulletin.com/blog/2018/09/vb2018-preview-anatomy-attack-detecting-and-defeating-crashoverride/

VB2017 video: Client Maximus raises the bar

At VB2017, IBM Trusteer researcher Omer Agmon, presented a 'last-minute' paper in which he analysed the Client Maximum trojan, which targets Brazilian users of online banking. Today, we release the recording of his presentation.
Brazil has long been known as a hotbed of cybercrime, but what makes the country especially unique is that a lot of this cybercrime is inwards-focused. Thus there are many malware… https://www.virusbulletin.com/blog/2018/08/vb2017-video-client-maximus-raises-bar/

Malware authors' continued use of stolen certificates isn't all bad news

A new malware campaign that uses two stolen code-signing certificates shows that such certificates continue to be popular among malware authors. But there is a positive side to malware authors' use of stolen certificates.
A malware campaign has been using code-signing certificates stolen from Taiwanese companies to sign its samples, ESET researcher and regular VB conference speaker Anton Cherepanov… https://www.virusbulletin.com/blog/2018/07/malware-authors-continued-use-stolen-certificates-not-only-bad-news/

.SettingContent-ms files remind us that it is features, not bugs we should be most concerned about

Security researcher Matt Nelson has discovered how .SettingContent-ms files can be embedded into Office files to deliver malware.
One of the most significant developments in the threat landscape in recent years has been the return of malicious Office macros, their resurgence having started four years ago.… https://www.virusbulletin.com/blog/2018/07/settingcontent-ms-files-remind-us-it-features-not-bugs-we-should-be-most-concerned-about/

XMRig used in new macOS cryptominer

A new piece of cryptocurrency-mining malware on macOS has been found to use the popular XMRig miner.
Users complaining on Apple's official discussion forum about processes that use a lot of CPU have led to the discovery of a new piece of cryptocurrency-mining malware on macOS… https://www.virusbulletin.com/blog/2018/05/xmrig-used-new-macos-cryptominer/

GravityRAT malware takes your system's temperature

The GravityRAT malware, discovered by Cisco Talos researchers, gives some interesting insight into modern malware development.
Cisco Talos researchers Warren Mercer and Paul Rascagnères recently discovered and analysed 'GravityRAT', an advanced Remote Access Trojan (RAT) that appears to have been used in… https://www.virusbulletin.com/blog/2018/04/gravityrat-malware-takes-your-systems-temperature/

Using Mailchimp makes malware campaigns a little bit more successful

In recent months, some malicious spam campaigns have been spreading via the systems of Mailchimp, a well-known email service provider - a tactic which may give the campaigns a slightly higher success rate.
Sending one email is easy. Sending thousands or millions of emails is hard: one effect of the anti-spam infrastructure we have collectively built is that the process of sending… https://www.virusbulletin.com/blog/2018/03/using-mailchimp-makes-malware-campaigns-little-bit-more-successful/

We need to continue the debate on the ethics and perils of publishing security research

An article by security researcher Collin Anderson reopens the debate on whether publishing threat analyses is always in the public interest.
At VB2015 in Prague, Juan Andrés Guerro-Saade, then of Kaspersky Lab, presented an important paper on the transformation of security researchers into intelligence brokers and how… https://www.virusbulletin.com/blog/2018/02/we-need-continue-debate-ethics-and-perils-publishing-security-research/

There is no evidence in-the-wild malware is using Meltdown or Spectre

Reports of malware using the Meltdown or Spectre attacks are likely based on proof-of-concept code rather than files written for a malicious purpose.
Almost a month after the Meltdown and Spectre attacks against various CPUs were discovered and revealed to the public, there have been reports of the existence of malware that… https://www.virusbulletin.com/blog/2018/02/there-no-evidence-wild-malware-using-meltdown-or-spectre/

Alleged author of creepy FruitFly macOS malware arrested

A 28-year old man from Ohio has been arrested on suspicion of having created the mysterious FruitFly malware that targeted macOS and used it to spy on its victims.
It is almost a year since the mysterious FruitFly malware for macOS was discovered. Malware targeting macOS is still uncommon enough to be newsworthy, but FruitFly seemed… https://www.virusbulletin.com/blog/2018/01/alleged-author-creepy-fruitfly-macos-malware-arrested/

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