Suspicious Shell Script Execution From Temp Directory on SonicWall SMA1000 Appliance (via process_creation)

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1133External Remote Services
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1133External Remote Services
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects chmod granting execute permission to shell scripts in /tmp followed by their execution through bash on a SonicWall SMA1000 appliance. This behavior was observed during in-the-wild exploitation of the CVE-2026-15409 and CVE-2026-15410 path traversal zero days where the actor staged post-exploitation payloads. Detecting it surfaces hands-on-keyboard code execution on an internet-facing appliance where interactive shell activity is otherwise abnormal.

Reporting behind it

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Suspicious Shell Script Execution From Temp Directory on SonicWall SMA1000 Appliance (via process_creation)

Pivot detection · T1190 · 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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