SSH over port 443 with known Server and Client Strings

Analysis Detection

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1572Protocol Tunneling
Exfiltration
Impact

What it detects

Will detect the presence of known SSH client and SSH server strings that have been used for SSH tunneling.

Reporting behind it

thedfirreport.comhttps://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/

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Possible Ngrok RDP Tunnel Exposure via TCP 3389

Malicious Cloudflared Tunnel Established with Token

SSH over port 443 with known Server and Client Strings

Pivot detection · T1572 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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