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Microsoft Security Intelligence
Published Sep 22, 2019 | Updated Feb 27, 2025

Trojan:Win32/Malgent!MSR

Detected by Microsoft Defender Antivirus

Aliases: No associated aliases

Summary

Trojan:Win32/Malgent!MSR is a malware strain used by Diamond Sleet, a North Korean state-sponsored threat actor, in its software hijacking campaigns. The malware is primarily delivered through social engineering attacks using WhatsApp, LinkedIn, OneDrive, and Google Drive, where victims receive *.zip files containing trojanized software. These zip files often use job-related lures, masquerading as legitimate engineering, maintenance technician, or program manager documents. Once the victim runs the software, DLL hijacking occurs, allowing the attacker to install a backdoor, enabling further payload execution and credential theft. 

Microsoft Defender Antivirus automatically removes threats as they are detected. However, many infections can leave remnant files and system changes. Updating your antimalware definitions and running a full scan might help address these remnant artifacts.

You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

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