I published the following diary on isc.sans.org: “When Bad Guys are Pwning Bad Guys…“. A few months ago, I wrote a diary about webshells[1] and the numerous interesting features they offer. They’re plenty of web shells available, there are easy to find and install. They are usually delivered as one
For years, Google is offering two nice features with his gmail.com platform to gain more power of your email address. You can play with the “+” (plus) sign or “.” (dot) to create more email addresses linked to your primary one. Let’s take an example with John who’s the owner
I published the following diary on isc.sans.org: “HTTP Headers… the Achilles’ heel of many applications“. When browsing a target web application, a pentester is looking for all “entry†or “injection†points present in the pages. Everybody knows that a static website with pure HTML code is less juicy compared to a
Today, while hunting, I found a malicious HTML page in my spam trap. The page was a fake JP Morgan Chase bank. Nothing fancy. When I found such material, I usually search for “POST” HTTP requests to collect URLs and visit the websites that receive the victim’s data. As usual, the
Here is my quick wrap-up of the FIRST Technical Colloquium hosted by Cisco in Amsterdam. This is my first participation to a FIRST event. FIRST is an organization helping in incident response as stated on their website: FIRST is a premier organization and recognized global leader in incident response. Membership
I published the following diary on isc.sans.org: “Analysis of a Maldoc with Multiple Layers of Obfuscation“. Thanks to our readers, we get often interesting samples to analyze. This time, Frederick sent us a malicious Microsoft Word document called “Invoice_6083.doc” (which was delivered in a zip archive). I had a quick
The Internet Archive is a well-known website and more precisely for its “WaybackMachine” service. It allows you to search for and display old versions of websites. The current Alexa ranking is 262 which makes it a “popular and trusted” website. Indeed, like I explained in a recent SANS ISC diary, whitelists
I published the following diary on isc.sans.org: “DNS Query Length… Because Size Does Matter“. In many cases, DNS remains a goldmine to detect potentially malicious activity. DNS can be used in multiple ways to bypass security controls. DNS tunnelling is a common way to establish connections with remote systems. It is
I published the following diary on isc.sans.org: “Hunting for Malicious Excel Sheets“. Recently, I found a malicious Excel sheet which contained a VBA macro. One particularity of this file was that useful information was stored in cells. The VBA macro read and used them to download the malicious PE file.
After a nice evening with some beers and an excellent dinner with infosec peers, here is my wrap-up for the second day. Coffee? Check! Wireless? Check! Twitter? Check! As usual, the day started with a keynote. Window Snyder presented “All Fall Down: Interdependencies in the Cloudâ€. Window is the CSO
