SapphireStealer Malware: A Gateway to Espionage and Ransomware Operations

An open-source .NET-based information stealer malware dubbed SapphireStealer is being used by multiple entities to enhance its capabilities and spawn their own bespoke variants.

Talos has also detected the malware downloader being used to deliver remote administration tools like DCRat, njRAT, DarkComet, and Agent Tesla.

Several variants of this threat are already in the wild, and threat actors are improving on its efficiency and effectiveness over time, Brumaghin said.

Talos warns that an entire ecosystem has developed over time that allows both financially motivated and nation-state actors to use services from purveyors of stolen information malware to carry out various kinds of attacks.

It warns that this threat will evolve over time.

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