178.236.243.8:3050

About NFC Relay (provisional)

Android NFC-relay fraud malware. Running on a victim's phone, it reads contactless bank-card/tag data over NFC and relays it in real time over a WebSocket channel to an attacker-controlled device, which replays it at a payment terminal or ATM for fraudulent transactions (an NFSkimming / "NGate"-style technique). The relay C2 (where captured card APDUs, device status and the victim 4-digit PIN are pushed over a WebSocket) is wss://dashboard.gripe/ws-relay in the current build and ws://178.236.243.8:3050 in an earlier com.example.myemulator build. dashboardcloud.app is the operator WebView phishing-UI host (loaded via webView.loadUrl with a Portuguese ?step= flow and an "Android" JS bridge) - tracked as a panel, not the relay. api.dashboardcloud.app (painelStatusUrl) is assigned in the dex but never contacted, so it is NOT recorded as a C2. One widely repackaged build (identical classes.dex; lure label "Nfc Security", package app.nfcsecurity.vault, Portuguese UI) stores its endpoints character-reversed and un-reverses them via UtilZ0Y480.decode, with source-to-sink bs.getWsUrl() -> SERVER_URL -> OkHttp newWebSocket(); it also carries a dormant base64+XOR alternate config (ws/web/api.cupworldcup.site) that the getters never use, so that is not treated as a live C2. Family label provisional.

Signing certificate

Subject CN

David Brown

Issuer CN

David Brown

Valid

2026-03-10 → 2053-07-26

Fingerprint

93c6196f270594a3011378729ca996fe64789bf5a9644361a2214a67ce16c615

Other samples signed with this certificate? That's a lead worth checking - but not proof of a shared operator, since signing keys (and the Android debug certificate in particular) are widely reused. See the certificate page for every sample signed with it.