Suspicious FRP Proxy Download via wget to Temporary Directory (via process_creation)

PremiumReviewedSigma · High · v1
Product
linux
Category
process_creation
Author
HuntRule
Published
2026-09-16
Updated
2026-09-16

ATT&CK techniques

C2
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. Exfiltration

  13. Impact

What it detects

This rule detects wget fetching the FRP fast reverse proxy binary into a temporary directory after Ivanti EPMM exploitation for tunneling and SOCKS proxying. Attackers staged frpc under hidden /tmp paths to establish covert network access. Downloading frpc to /tmp is a strong lateral movement and C2 indicator.

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Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.