Delving deep into VBScript

In late April we found and wrote a description of CVE-2018-8174, a new zero-day vulnerability for Internet Explorer that uses a well-known technique from the PoC exploit CVE-2014-6332. But whereas CVE-2014-6332 was aimed at integer overflow exploitation for writing to arbitrary memory locations, my interest lay in how this technique was adapted to exploit the use-after-free vulnerability. Read Full Article

Hidden tear and its spin offs

A while ago Turkish security group Otku Sen created the hidden tear ransomware and published the source code online. Idea behind it was to “teach” security researchers how ransomware works. Right from the beginning the reaction of various security professionals was negative. And we were right, it didn’t take long before the first ransomware variants arrived based on the hidden tear source code. Read Full Article

On the trail of Stagefright 2

In early October, it was announced that a critical vulnerability had been found in the libutils library. Although exploits for newly discovered vulnerabilities take a while to appear ‘in the wild’, we believe we should be prepared to detect them even if there have been no reports, as yet, of any such exploits being found. Because of this, we decided to do the research and generate a PoC file on our own. Read Full Article

Area41, formerly known as …

Gruezi from Zurich, Switzerland, where the Area41 conference is currently being held. Area41 doesn’t ring a bell? Well, this event went under a renaming process and was formerly known as Hashdays, that took place in Lucerne. However, the steering team behind… Read Full Article