Fileless Remcos Attacks: Injecting Malicious Code into RMClient to Evade EDR

CyberProof researchers detected a significant surge in Remcos (Remote Control & Surveillance Software) campaigns throughout September and October 2025, exploiting sophisticated fileless techniques to evade endpoint detection and response (EDR) solutions. By leveraging highly obfuscated PowerShell scripts and process hollowing into Microsoft’s RMClient.exe, attackers are gaining stealthy persistence and targeting browser credentials. Although Remcos is […]

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