I published the following diary on isc.sans.org: “Mining or Nothing!“: Cryptocurrencies mining has been a trending attack for a few weeks. Our idling CPUs are now targeted by bad guys who are looked to generate some extra revenue by abusing our resources. Other fellow handlers already posted diaries about this topic.
I published the following diary on isc.sans.org: “2017, The Flood of CVEs“: 2017 is almost done and it’s my last diary for this year. I made a quick review of my CVE database (I’m using a local cve-search instance). The first interesting number is the amount of CVE’s created this
If you own a website, you already know that servers are visited all day long by bots and crawlers with multiple intents, sometimes good but also sometimes bad. An interesting field in web server logs is the “user-agent”. The RFC 2616 describes the User-Agent field used in HTTP requests:
Who said that all computers are connected today? They are many classified environments where computers can simply never connect to the wild Internet. But sometimes, you need to install some pieces of software from online resources. The classic case is Python modules. Let’s take a practical example with the PyMISPÂ which
More a file format is used in a malware infection chain, more files of this type will be flagged as suspicious, analyzed or blocked by security controls. That’s why attackers are constantly looking for new ways to infect computers and use more exotic file formats. Like fashion is in a
I published the following diary on isc.sans.org: “Example of ‘MouseOver’ Link in a Powerpoint File“: I really like Microsoft Office documents…Â They offer so many features that can be (ab)used to make them virtual bombs. Yesterday, I found a simple one but nicely prepared Powerpoint presentation: Payment_copy.ppsx (SHA256:7d6f3eb45c03a8c2fca4685e9f2d4e05c5fc564c3c81926a5305b6fa6808ac3f). It was still
I published the following diary on isc.sans.org: “Microsoft Office VBA Macro Obfuscation via Metadata“: Often, malicious macros make use of the same functions to infect the victim’s computer. If a macro contains these strings, it can be flagged as malicious or, at least, considered as suspicious. Some examples of suspicious functions
I published the following diary on isc.sans.org: “Tracking Newly Registered Domains“: Here is the next step in my series of diaries related to domain names. After tracking suspicious domains with a dashboard and proactively searching for malicious domains, let’s focus on newly registered domains. They are a huge number of
And this is already the end of Botconf. Time for my last wrap-up. The day started a little bit later to allow some people to recover from the social event. It started at 09:40 with a talk presented by Anthony Kasza, from PaloAlto Networks: “Formatting for Justice: Crime Doesn’t Pay, Neither
I’m just back from the social event that was organized at the aquarium Mare Nostrum. A very nice place full of threats as you can see in the picture above. Here is my wrap-up for the second day. The first batch of talks started with “KNIGHTCRAWLER,  Discovering Watering-holes for Fun,
