How to detect the modular RAT CSHARP-STREAMER
The malware known as CSHARP-STREAMER is a Remote Access Trojan (RAT) developed in .NET. It has been deployed in numerous attacks over the past few years. Reports have mentioned its deployment during attacks orchestrated by REvil. However, during our casework we were able to observe the threat actor behind the ransomware Metaencryptor using CSHARP-STREAMER. Based on our visibility we assume, that Metaencryptor shows a special interest in IT service providers.