CastleLoader: A Deep Dive into Stealthy Loader Targeting Government Sector  

ANY.RUN’s team conducted an extensive malware analysis of CastleLoader, the first link in the chain of attacks impacting various industries, including government agencies and critical infrastructures.  It’s a unique walkthrough of its entire execution path, from a packaged installer to C2 server connection, as well as an overview of a parser developed to extract initialized local variables and automatically decode indicators of compromise (IOCs) featured in them.  Key Takeways  CastleLoader as an Initial Access Threat  CastleLoader is a malicious loader malware built to deliver and install other malicious components.
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