Incidents

Adserver compromised – legitimate sites serving malware

Saturday seemed like a quiet day, apart from the new Sober, however it was far from that. In the morning I received some local reports claiming that some respectable sites were distributing malware.

As it turns out, a popular Adserver had been compromised and scripts were modified in such a way that instead of just ads, malware was also delivered to the visitor. At least dozens of sites have unintentionally ‘distributed’ malware, many of them sites with greatly respected names.

This news comes after reports of other (ad)servers being compromised, all using Exploit.HTML.Iframebof to infect the system with malware.

Seeing that there currently is no patch for Exploit.HTML.Iframebof available, Kaspersky Lab strongly recommends anyone using MS Windows, but not running XP/SP2, to use an alternative browser.

A more detailed article on this subject will be posted soon on viruslist.com.

Adserver compromised – legitimate sites serving malware

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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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