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In our previous blogpost on Triangulation, we discussed the details of TriangleDB, the main implant used in this campaign, its C2 protocol and the commands it can receive. We mentioned, among other things, that it is able to execute additional modules. We also mentioned that this operation was quite stealthy. This article details one important aspect of this attack – the stealth that was exercised by the threat actor behind it. Along the way, we will also reveal more information about the components used in this attack. The outstanding stealth of Operation Triangulation