Malicious Process Memory Injection via dd Write to /proc/pid/mem by UNC3886 (via process_creation)
- Product
- linux
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-05-02
- Updated
- 2026-08-28
ATT&CK techniques
Priv Esc → Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects the dd utility writing to a process memory file under /proc, the injection primitive UNC3886 used to load TINYSHELL backdoors into legitimate processes on Junos OS routers. Direct writes to another process memory are a strong indicator of code injection and defense evasion.
Reporting behind it
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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