Malicious Bash Dev-TCP Reverse Shell via Shell (via process_creation)

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
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects an interactive bash shell redirecting input and output through a /dev/tcp network socket on Linux hosts. This reverse shell technique was used by the marimo blockchain botnet campaign to obtain interactive access after exploitation. Bash reverse shells over /dev/tcp are almost never legitimate and indicate hands on access.

Reporting behind it

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Malicious Bash Dev-TCP Reverse Shell via Shell (via process_creation)

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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