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

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Reports

APT trends report Q2 2021

This is our latest summary of advanced persistent threat (APT) activity, focusing on significant events that we observed during Q2 2021: attacks against Microsoft Exchange servers, APT29 and APT31 activities, targeting campaigns, etc.

LuminousMoth APT: Sweeping attacks for the chosen few

We recently came across unusual APT activity that was detected in high volumes, albeit most likely aimed at a few targets of interest. Further analysis revealed that the actor, which we dubbed LuminousMoth, shows an affinity to the HoneyMyte group, otherwise known as Mustang Panda.

WildPressure targets the macOS platform

We found new malware samples used in WildPressure campaigns: newer version of the C++ Milum Trojan, a corresponding VBScript variant with the same version number, and a Python script working on both Windows and macOS.

Ferocious Kitten: 6 years of covert surveillance in Iran

Ferocious Kitten is an APT group that has been targeting Persian-speaking individuals in Iran. Some of the TTPs used by this threat actor are reminiscent of other groups, such as Domestic Kitten and Rampant Kitten. In this report we aim to provide more details on these findings.

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