Suspicious Bash Dev-TCP Reverse Shell Execution

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.004Unix Shell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects Linux shell invocations that open an interactive reverse shell through the bash /dev/tcp pseudo-device, often chained with base64 decoding piped into bash. This technique was observed in opportunistic React2Shell exploitation to establish command-and-control after remote code execution on affected hosts.

Reporting behind it

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Suspicious Bash Dev-TCP Reverse Shell Execution

Pivot detection · T1059.004 · 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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