Cyber threat infographic: FIN7 icon with SSH backdoor, arrows to remote access; protective shields for monitoring and segmentation, with "Secure Your Network" warning banner over a server.

FIN7, a prolific cybercriminal group, maintains a Windows SSH backdoor since 2022 with minimal changes, using an install.bat script and OpenSSH for reverse SSH tunnels and SFTP data exfiltration. This allows persistent remote access on compromised systems, targeting retail, hospitality, and finance sectors.

Cyber threat infographic: FIN7 icon with SSH backdoor, arrows to remote access; protective shields for monitoring and segmentation, with "Secure Your Network" warning banner over a server.Cyber threat infographic: FIN7 icon with SSH backdoor, arrows to remote access; protective shields for monitoring and segmentation, with "Secure Your Network" warning banner over a server.

The backdoor blends with legitimate traffic, evading detection by initiating outbound connections and disguising theft as routine SSH activity. FIN7's conservative approach keeps the tool effective against defenses.

Cyber threat infographic: FIN7 icon with SSH backdoor, arrows to remote access; protective shields for monitoring and segmentation, with "Secure Your Network" warning banner over a server.Cyber threat infographic: FIN7 icon with SSH backdoor, arrows to remote access; protective shields for monitoring and segmentation, with "Secure Your Network" warning banner over a server.

Defend against this: Monitor SSH logs for anomalies, segment networks to limit SSH access, and use behavioral analysis to detect reverse tunnels. Stay vigilant against evolving APT tactics.


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