Suspicious Renaming of System wget and curl Binaries (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1036.004Masquerade Task or Service
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the system wget and curl binaries being renamed to wget_w and curl_c on QNAP and embedded devices. The PolarEdge QNAP backdoor relocates these download utilities to evade detection rules that watch the standard tool names while retaining download capability. Renaming trusted system binaries to these suffixed names is a defense evasion tactic specific to the implant.

Reporting behind it

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Suspicious Renaming of System wget and curl Binaries (via process_creation)

Pivot detection · T1036.004 · 8 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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