ID:
EMULATOR_GOLDFISHCategory: Emulation, profiles, and isolation Status in RKNHardering 2.10.0: Active check Role in the verdict: Medium
This page describes the actual implementation in RKNHardering 2.10.0. It distinguishes what can be done without root, what requires root, and where a mitigation only reduces one signal without hiding the VPN as a whole.
ro.hardware and ro.product.board are read through native code. If either value contains goldfish or ranchu, the probe emits goldfish and a high-confidence review finding.
The substring goldfish or ranchu appears in either property.
Goldfish and Ranchu are characteristic Android Emulator platforms, so this signal is stronger than the general fingerprint heuristic.
How the line affects the report: The line does not produce a final verdict on its own, but it sets needsReview=true and adds medium-confidence evidence.
A test-board vendor could use a similar name. A nonstandard emulator may use a different hardware profile.
This line must be evaluated together with neighboring signals. A clean result from a single API does not simultaneously cover Java Binder, libc, raw netlink/syscalls, procfs/sysfs, local sockets, and server-side indicators.
To avoid this class of indicators, use a physical device running a production build. QEMU properties, goldfish/ranchu markers, special devices, and the build fingerprint are part of the environment; an ordinary app cannot change them consistently without system modification. Treat a cloud phone or OEM clone as a separate environment as well, and compare it against a physical-device baseline.
Spoofing a couple of getprop values does not turn an emulator into a physical device: drivers, /dev nodes, the hardware profile, ABI, and kernel behavior remain. Root modules used for spoofing can remove one marker while creating hook, property, or library mismatches. They may be acceptable as an experiment during development, but RKNHardering should be run on a real device for a valid result.
adb shell getprop ro.hardware
adb shell getprop ro.product.board
Compare the exact case and the complete value.
After any change, force-stop both RKNHardering and the VPN client, start them again, and repeat the full scan. Zygisk, Xposed, and kernel modules usually require a reboot. Compare not only this line but also neighboring signals: a partial hook often creates inconsistencies between APIs.
The probe itself runs with ordinary app permissions and does not request root. The ADB commands below are for orientation only: adb shell runs under a different UID and may see either more or less than the app process. The decisive test is to run the check again after a force-stop.
Spoofing ro.hardware may affect the HAL, graphics, and vendor-component selection.
Remove the property spoofing and boot the original system/vendor snapshot.
Medium. Verified against kHwProps and the substring condition.
The status of a third-party solution does not automatically carry over to this device. A module developer’s claim is only the initial hypothesis; confirmation requires a reproducible RKNHardering result on the specific Android version, firmware, and kernel.
native_signs_probe.cpp — native probe implementation.NativeSignsChecker.kt — main native/legacy verdict logic.NativeSignalId.kt — complete ID registry.NativeSignalCatalog.kt — category, slug, and line mapping.Related signals: emulator-qemu-property, emulator-qemu-driver, emulator-build-profile.