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Research Roundup: Recent Probable Charming Kitten Infrastructure

Howdy, and welcome to the ThreatConnect Research Roundup, a collection of recent findings by our Research Team and items from open source publications that have resulted in Observations of related indicators across ThreatConnect’s CAL™ (Collective Analytics Layer).

Note: Viewing the pages linked in this blog post requires a ThreatConnect account.

In this edition, we cover:

  • APT35 / Charming Kitten / Phosphorus
  • Mustang Panda PlugX
  • Emotet
  • WastedLocker
  • WordPress Vulnerabilities


Roundup Highlight: Recent Probable Charming Kitten Infrastructure

20200803B: Microsoft Phosphorus Sinkhole Domain Siblings


Our highlight in this Roundup is Incident 20200803B: Microsoft Phosphorus Sinkhole Domain Siblings. ThreatConnect Research reviewed the following domains (and the notable IPs that previously hosted them) that began resolving to Microsoft’s Phosphorus sinkhole in late July 2020: ( ( ( ( ( (

We identified several additional domains that probably are related to Phosphorus / APT35 / Charming Kitten based on co-locations with the aforementioned domains on likely dedicated servers. The relevant IPs, the additional domains, and other notable IPs hosting those domains include the following: (,,, (

Finally, we reviewed those additional, likely dedicated IPs identified from the hosting history for the co-located domains. This identified another set of domains that probably are associated with Phosphorus based on those co-locations and naming convention reuse: (prev


ThreatConnect Research Team Intelligence: Items recently created or updated in the ThreatConnect Common Community by our Research Team.

Technical Blogs and Reports Incidents with Active and Observed Indicators: Incidents associated to one or more Indicators with an Active status and at least one global Observation across the ThreatConnect community. These analytics are provided by ThreatConnect’s CAL™ (Collective Analytics Layer).



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