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Hackers abuse FTP server banners to deliver new Windows malware

August 21, 2026 · BleepingComputer · Severity: HIGH

Threat actors are abusing FTP server banners to hide commands that deliver two new remote access trojans named E4del and PINHOLE. The malware is delivered through malicious FTP banners that appear legitimate to users. E4del and PINHOLE provide attackers with remote access to compromised systems. This technique represents a novel approach to malware delivery, exploiting trust in FTP banner messages.

Key Takeaways

  • Threat actors are using FTP server banners to hide commands for delivering E4del and PINHOLE trojans.
  • E4del and PINHOLE are newly discovered remote access trojans delivered through this novel technique.
  • The attack exploits user trust in FTP banner messages to deliver malware.
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