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

Lazarus targets defense industry with ThreatNeedle

In mid-2020, we realized that Lazarus was launching attacks on the defense industry using the ThreatNeedle cluster, an advanced malware cluster of Manuscrypt (a.k.a. NukeSped). While investigating this activity, we were able to observe the complete life cycle of an attack, uncovering more technical details and links to the group’s other campaigns.

Sunburst backdoor – code overlaps with Kazuar

While looking at the Sunburst backdoor, we discovered several features that overlap with a previously identified backdoor known as Kazuar. Our observations shows that Kazuar was used together with Turla tools during multiple breaches in past years.

Lazarus covets COVID-19-related intelligence

As the COVID-19 crisis grinds on, some threat actors are trying to speed up vaccine development by any means available. We have found evidence that the Lazarus group is going after intelligence that could help these efforts by attacking entities related to COVID-19 research.

Sunburst: connecting the dots in the DNS requests

We matched private and public DNS data for the SUNBURST-malware root C2 domain with the CNAME records, to identify who was targeted for further exploitation. In total, we analyzed 1722 DNS records, leading to 1026 unique target name parts and 964 unique UIDs.

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