Suspicious Linux Network Route Reconnaissance via Proc Filesystem by UAT-7290

PremiumReviewedSigma · Medium · v1
Category
process_creation
Author
HuntRule
Published
2026-07-19
Updated
2026-08-28

ATT&CK techniques

Execution → Discovery
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects reading of the kernel routing table from proc and filtering for the default gateway using awk. UAT-7290 runs this one-liner to fingerprint the network configuration of compromised edge devices. Parsing the default route helps an actor understand the victim network before deploying tunneling implants.

Related detections9 linkedT1059.004 — drag to rearrange
Suspicious Base64 Decoded Payload Piped to Shell on Linux
Suspicious Netcat Reverse Shell via Named Pipe on Linux via Process Creation (via process_creation)
Suspicious OpenClaw Skill File Modification via File Event
Possible TP-Link Command Injection via WlanNetworkRpm Endpoint (via webserver)
Suspicious Base64 Decoded Shell Dropper via Command Line
Possible Mirai IoT Payload Staging via chmod on Linux (via process_creation)
Malicious Command Injection Probe via node Spawning Shell Arithmetic Echo (via process_creation)
Malicious Reverse Shell via bash dev tcp Redirection (via process_creation)
Suspicious Base64 Bash Execution via nohup on macOS via ClickFix (via process_creation)
Suspicious Linux Network Route Reconnaissance via Proc Filesystem by UAT-7290
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.