429c9de426ae01faa2ffc088…

sample

Tracked by C2 Tracker · indicators & metadata only, the APK itself is never published

Analyst notes

Black Hawk (黑鹰安卓远控, “Black Hawk Android Remote Control” - the branding on the C2 admin panel). Fake Rakuten app: outer package org.work.play.fast, display name 楽天アカウント保護 (“Rakuten Account Protection”). Native XOR packer: stub Sa Application loads libsa.so and decrypts the real DEX from asset mqtepbznwo with a 32-byte XOR key (payload[i]^=key[i%32], 8-byte length header); the 17.7 MB rb38JoWoZ asset is size-padding decoy. Inner trojan package com.next.move.work. C2 https://www.collectpointsjp.com. Per-build AES-256 exfil key (Cf.K1): 7e875d4c0ef5b503f5923612911fe75d9cda034dc586b86d91a8151f96be4a5e.

Identification

SHA-256: 429c9de426ae01faa2ffc08850e70fa0b4ace5fa2a56b7908fa9dacb72a77fbd
MD5: cd9b8f2f30becf7f008895c07c6169bf

Observed

Families: Black Hawk
First seen: 2026-10-05

APK metadata

Summary

Type: Android · APK
Package: org.work.play.fast
Main activity: org.work.play.fast.MainActivity
Internal version: 10668
Displayed version: 1.6.68
Min SDK: 24
Target SDK: 34

Signing certificate

Valid from: 2008-02-29 01:33:46
Valid to: 2035-07-17 01:33:46
Serial: 936eacbe07f201df
Thumbprint: 61ed377e85d386a8dfee6b864bd85b0bfaa5af81
Subject: C:US, CN:Android, L:Mountain View, O:Android, ST:California, OU:Android, email:[email protected]
Subject email: [email protected]
Issuer: C:US, CN:Android, L:Mountain View, O:Android, ST:California, OU:Android, email:[email protected]

Permissions (4)

android.permission.INTERNETandroid.permission.POST_NOTIFICATIONSandroid.permission.REQUEST_INSTALL_PACKAGESorg.work.play.fast.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Activities (2)

org.work.play.fast.MainActivity
org.work.play.fast.Wv

Services (1)

org.work.play.fast.Bv

Receivers (2)

androidx.profileinstaller.ProfileInstallReceiver
org.work.play.fast.Ir

Providers (2)

androidx.core.content.FileProvider
androidx.startup.InitializationProvider

Intent filters - actions

androidx.profileinstaller.action.BENCHMARK_OPERATIONandroidx.profileinstaller.action.INSTALL_PROFILEandroidx.profileinstaller.action.SAVE_PROFILEandroidx.profileinstaller.action.SKIP_FILEorg.work.play.fast.INSTALL_COMPLETE

C2 configuration (1)

Every indicator extracted from this sample. One row per C2 - each links to its indicator page with Whois, DNS and certificate pivots.

Indicator	Type	Port	Scheme	Family	First seen
www.collectpointsjp.com	domain	-	https	Black Hawk	2026-10-05

Signing certificate

Subject CN: Android
Issuer CN: Android
Fingerprint: a40da80a59d170caa950cf15c18c454d47a39b26989d8b640ecd745ba71bf5dc

Relationships

Sample → C2 indicators, signing certificate (with every other sample signed by it) and family. Click a node for details, double-click to open its page.

Click a node to inspect it.

About Black Hawk

An Android banking/credential phishing trojan distributed under targeted brand lures. Observed builds impersonate Japanese services - for example a "Rakuten account protection" app (label "楽天アカウント保護", padded with zero-width characters) - under innocuous package names (com.safe.high.link, org.fast.clean.work). It ships a small native helper (lib/*/libsa.so) and requests REQUEST_INSTALL_PACKAGES to drop and install follow-on payloads. The C2 is decoded by the family's extractor from the sample and recovered in plaintext; samples in this cluster beacon to https://tnt.freedomdf.xyz. Phishing lure and overlay content steal account credentials and intercepted one-time passwords.