VB Blog

VB2016 video: Last-minute paper: Malicious proxy auto-configs: an easy way to harvest banking credentials

Posted by   Martijn Grooten on   May 30, 2017

In a VB2016 last-minute presentation, Jaromír Horejší and Jan Širmer looked at Retefe, a trojan that has targeted banks in several European countries and used malicious proxy auto-config filesto redirect users' traffic to a server controlled by the attackers. A recording of their presentation is now available to view on our YouTube channel.

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WannaCry shows we need to understand why organizations don't patch

Posted by   Martijn Grooten on   May 17, 2017

Perhaps the question we should be asking about WannaCry is not "why do so many organizations allow unpatched machines to exist on their networks?" but "why doesn't patching work reasonably well most of the time?"

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Modern security software is not necessarily powerless against threats like WannaCry

Posted by   Martijn Grooten on   May 15, 2017

The WannaCry ransomware has affected many organisations around the world, making it probably the worst and most damaging of its kind. But modern security is not necessarily powerless against such threats.

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Throwback Thursday: CARO: A personal view

Posted by   Helen Martin on   May 11, 2017

This week sees the 11th International CARO Workshop taking place in Krakow, Poland – a prestigious annual meeting of anti-malware and security experts. As a founding member of CARO, Fridrik Skulason was well placed, in August 1994, to shed some light on the organization, to explain in detail CARO's main activities and functions, as well as the reasons behind its strict membership regulations.

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VB2016 paper: Uncovering the secrets of malvertising

Posted by   Martijn Grooten on   May 10, 2017

Malicious advertising, a.k.a. malvertising, has evolved tremendously over the past few years to take a central place in some of today’s largest web-based attacks. It is by far the tool of choice for attackers to reach the masses but also to target them with infinite precision and deliver such payloads as ransomware. Today, we publish a paper presented at VB2016 in Denver by Malwarebytes researchers Jérôme Segura and Chris Boyd, in which they look at the advertising ecosystem, how it is used, and at what techniques are being utilised to spread malware

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Throwback Thursday: Tools of the DDoS Trade

Posted by   Helen Martin on   May 4, 2017

As DDoS attacks become costlier to fix and continue to increase in both number and diversity, we turn back the clock to 2000, when Aleksander Czarnowski took a look at the DDoS tools of the day.

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VB2016 paper: Building a local passiveDNS capability for malware incident response

Posted by   Martijn Grooten on   May 4, 2017

At VB2016, Splunk researchers Kathy Wang and Steve Brant presented a Splunk app that can be used to locally collect passive DNS data. A recording of their presentation is now available to view on our YouTube channel.

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VB2016 video: Last-minute paper: A malicious OS X cocktail served from a tainted bottle

Posted by   Martijn Grooten on   Apr 28, 2017

In a VB2016 last-minute presentation, ESET researchers Peter Kalnai and Martin Jirkal looked at the OS X malware threats KeRanger and Keydnap, that both spread through a compromised BitTorrent client. A recording of their presentation is now available to view on our YouTube channel.

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Consumer spyware: a serious threat with a different threat model

Posted by   Martijn Grooten on   Apr 25, 2017

Consumer spyware is a growing issue and one that can have serious consequences: its use is increasingly common in domestic violence. But do our threat models consider the attacker with physical access to, and inside knowledge of the victim?

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VB2016 paper: Debugging and monitoring malware network activities with Haka

Posted by   Martijn Grooten on   Apr 24, 2017

In their VB2016 paper, Stormshield researchers Benoît Ancel and Mehdi Talbi introduced Haka, an open-source language to monitor, debug and control malicious network traffic. Both their paper and the video recording of their presentation are now available to read/view on www.virusbulletin.com.

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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/

The malspam security products miss: banking and email phishing, Emotet and Bushaloader

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: banking and email phishing, Emotet and Bushaloader.
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-banking-and-email-phishing-emotet-and-bushaloader/

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/

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/

$150k in cryptocurrency stolen through combined BGP-DNS hijack

A BGP hijack was used to take over some of Amazon's DNS infrastructure, which was then used to serve a phishing site to users of the MyEtherWallet service.
If the Internet is, as is often said, held together with elastic bands and pieces of Sellotape, BGP is essentially a bunch of post-it notes that serve as traffic signs. BGP… https://www.virusbulletin.com/blog/2018/04/150-k-cryptocurrency-stolen-through-cominbed-bgp-dns-hijack/

Facebook helps you determine whether emails really came from its servers

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.
There are many good reasons to criticize Facebook for its collecting of our personal data, but the company also deserves credit for being at the forefront when it comes to online… https://www.virusbulletin.com/blog/2017/12/facebook-helps-you-determine-whether-emails-really-came-them/

Firefox 59 to make it a lot harder to use data URIs in phishing attacks

Firefox developer Mozilla has announced that, as of version 59 of the browser, many kinds of data URIs, which provide a way to create "domainless web content", will not be rendered in the browser, thus making this trick - used in various phishing campaign…
While a domain name is really just a short string, this string comes with a large amount of implicit metadata: the registration date; the IP address(es) the domain currently… https://www.virusbulletin.com/blog/2017/11/firefox-59-make-it-lot-harder-use-data-uris-phishing-attacks/

DMARC: an imperfect solution that can make a big difference

US Senator Ron Wyden has asked the Department of Homeland Security to implement DMARC. Martijn Grooten looks at what difference this could make for phishing attacks impersonating the US federal governent.
US Senator Ron Wyden has written a letter (pdf) to the Department of Homeland Security, urging the US government to implement DMARC to "ensure hackers cannot send emails that… https://www.virusbulletin.com/blog/2017/07/dmarc-imperfect-solution-can-make-big-difference/

VB2015 paper: Mobile Banking Fraud via SMS in North America: Who's Doing it and How

Though SMS may have been claimed dead many time, it is still very much alive, and quite popular among mobile phishers. At VB2015, Adaptive Mobile researcher Cathal Mc Daid presented a paper various mobile phishing campaigns targeting North American banks.
While SMS has been declared dead many times, the service remains frequently used - and abused. In a paper presented at VB2015 in Prague, Adaptive Mobile researcher Cathal Mc… https://www.virusbulletin.com/blog/2016/03/vb2015-paper-mobile-banking-fraud-sms-north-america-whos-doing-it-and-how/

VB2015 video: Making a dent in Russian mobile banking phishing

Sebastian Porst explains what Google has done to protect users from phishing apps targeting Russian banks.
Sebastian Porst explains what Google has done to protect users from phishing apps targeting Russian banks. In the last few years, mobile malware has evolved from a mostly… https://www.virusbulletin.com/blog/2015/12/video-making-dent-russian-mobile-banking-phishing/

Facebook launches platform for sharing of threat intelligence

Twitter, Yahoo! amongst early participants in 'ThreatExchange'.
Twitter, Yahoo! amongst early participants in 'ThreatExchange'. When I took my first steps in the security industry, I was surprised by just how much information was shared between… https://www.virusbulletin.com/blog/2015/02/facebook-launches-platform-sharing-threat-intelligence/

VB2014 paper: DMARC - how to use it to improve your email reputation

Terry Zink presents case study in which he describes setting a DMARC policy for Microsoft.
Terry Zink presents case study in which he describes setting a DMARC policy for Microsoft.Over the next few months, we will be sharing VB2014 conference papers as well as video… https://www.virusbulletin.com/blog/2014/11/paper-dmarc-how-use-it-improve-your-email-reputation/

Yahoo's DMARC policy wreaks havoc among mailing lists

Collateral damage in instruction to reject emails with invalid DKIM signatures.
Collateral damage in instruction to reject emails with invalid DKIM signatures. A change in Yahoo's DMARC policy has caused frustration among operators of many mailing lists and… https://www.virusbulletin.com/blog/2014/04/yahoo-s-dmarc-policy-wreaks-havoc-among-mailing-lists/

Latest spam filter test shows spam catch rates have bounced back

Spam catch rates improve, but performance on phishing lags behind that on other spam.
Spam catch rates improve, but performance on phishing lags behind that on other spam. Earlier this week we published the results of the 22nd VBSpam comparative spam filter test,… https://www.virusbulletin.com/blog/2012/11/latest-spam-filter-test-shows-spam-catch-rates-have-bounced-back/

PayPal spam leads to exploit kit

Clicking on links leads to Blackhole rather than phishing site.
Clicking on links leads to Blackhole rather than phishing site. Fake PayPal receipts were being spammed out this morning, with links leading to a version of the Blackhole exploit… https://www.virusbulletin.com/blog/2012/05/paypal-spam-leads-exploit-kit/

Significant rise in malicious spam and phishing

Over one quarter of malicious emails contain eight-year-old malware.
Over one quarter of malicious emails contain eight-year-old malware. Email security firm eleven has reported a significant rise in both malicious emails and phishing emails in the… https://www.virusbulletin.com/blog/2012/04/significant-rise-malicious-spam-and-phishing/

Significant rise in Chinese phishing sites

Phishers shown to care little about domain names.
Phishers shown to care little about domain names. In its latest 'Global Phishing Survey', the Anti-Phishing Working Group (APWG) reports a significant increase in phishing sites… https://www.virusbulletin.com/blog/2011/11/significant-rise-chinese-phishing-sites/

'Meta-phish' uses attached form to evade web filters

Landing page contains clear warning.
Landing page contains clear warning. A phishing email targeting Austrian credit card users evades web filters by using an attached HTML form, but thankfully the landing page on the… https://www.virusbulletin.com/blog/2011/10/meta-phish-uses-attached-form-evade-web-filters/

Google AdWords phishing campaign spreads

Users urged to login because of 'issues'.
Users urged to login because of 'issues'. A new phishing campaign that targets users of Google AdWords looks worryingly real, GFI reports. The phish begins with an email claiming… https://www.virusbulletin.com/blog/2011/10/google-adwords-phishing-campaign-spreads/

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