Incidents

New Net-Worm.Win32.DipNet.d

Internet Storm Center has been registering high traffic on port 11768 since the end of December. The appropriate graph is available at http://isc.sans.org/port_details.php?port=11768.

There also have been numerous reports from internet systems administrators on getting frequently repeated network packets with source port 445 and destination port 11768 stated. The latter makes the traffic look like activity of a Net-Worm opening a backdoor on 11768 and spreading via 445.

We’ve recently got a virus that opens a backdoor on 11768 and spreads via 445. The virus is a modification of Net-Worm.Win32.DipNet (Net-Worm.Win32.DipNet.d). Howewer, it seems that the previous modifications of the virus didn’t listen on port 11768.

An antivirus database update is already available. A detailed description of the virus will be available in the Virus Encyclopedia in the near future.

New Net-Worm.Win32.DipNet.d

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Reports

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.

What did DeathStalker hide between two ferns?

While tracking DeathStalker’s Powersing-based activities in May 2020, we detected a previously unknown implant that leveraged DNS over HTTPS as a C2 channel, as well as parts of its delivery chain. We named this new malware “PowerPepper”.

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