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How attackers built a RAT on a Windows machine using its own .NET compiler
In May 2026 an attacker compromised a UK medical practice endpoint without delivering a single malicious file. They used PowerShell and the .NET compiler built into Windows to build a Remcos remote access trojan on the machine itself, so signature antivirus had no known sample to match. The thing that caught it was DNS filtering, […] The post How attackers built a RAT on a Windows machine using its own .NET compiler appeared first on Heimdal Sec…
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How attackers built a RAT on a Windows machine using its own .NET compiler
In May 2026 an attacker compromised a UK medical practice endpoint without delivering a single malicious file. They used PowerShell and the .NET compiler built into Windows to build a Remcos remote access trojan on the machine itself, so signature antivirus had no known sample to match. The thing that caught it was DNS filtering, […] The post How attackers built a RAT on a Windows machine using its own .NET compiler appeared first on Heimdal Sec…
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