Incidents

The msvidctl Internet Explorer 0day

As you’ve probably already heard, there’s a dangerous vulnerability in Internet Explorer 6 & Internet Explorer 7 being exploited in the wild. The vulnerability affects Windows XP Service Pack 0 to Service Pack 3. Microsoft hasn’t released a patch yet, but they have provided a work-around.

Some people have simply recommended turning off JavaScript to mitigate this issue. However this vulnerability is a trivial buffer overflow which makes it possible to overwrite the SEH handler. Thus, heap spraying is not required and turning off JavaScript only mitigates attacks from less skilled attackers. I put a bit of time into researching this -it very quickly became clear that this vulnerability doesn’t rely on JavaScript, i.e. it can be exploited with JavaScript turned off:

The vulnerability allows arbitrary code execution and we therefore strongly recommend that you should apply the workaround from Microsoft’s advisory or turn off ActiveX altogether. Otherwise you will be at risk of exploitation of Internet Explorer 6 and Internet Explorer 7.

We’ve added generic detection for the actual exploit as Exploit.Win32.Direktshow and the often accompanying JavaScript as Exploit.JS.Direktshow.

(08.07, 15.04: edited to correct typo in the Service Pack information.)

The msvidctl Internet Explorer 0day

Your email address will not be published.

 

Reports

The SessionManager IIS backdoor

In early 2022, we investigated an IIS backdoor called SessionManager. It has been used against NGOs, government, military and industrial organizations in Africa, South America, Asia, Europe, Russia and the Middle East.

APT ToddyCat

ToddyCat is a relatively new APT actor responsible for multiple sets of attacks against high-profile entities in Europe and Asia. Its main distinctive signs are two formerly unknown tools that we call ‘Samurai backdoor’ and ‘Ninja Trojan’.

WinDealer dealing on the side

We have discovered that malware dubbed WinDealer, spread by Chinese-speaking APT actor LuoYu, has an ability to perform intrusions through a man-on-the-side attack.

APT trends report Q1 2022

This is our latest summary of advanced persistent threat (APT) activity, focusing on events that we observed during Q1 2022.

Subscribe to our weekly e-mails

The hottest research right in your inbox