b49d3191d491e4b1e70699c0…

sample

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

Analyst notes

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. Indicators: https://www.heiyingnb.xyz.

Identification

SHA-256: b49d3191d491e4b1e70699c032900289a5a5c3e0595271849bfecc66c900cf52
MD5: d5674978d66134fee231e90df989ffb3

Observed

Families: Black Hawk
First seen: 2026-09-30

APK metadata

Summary

Type: Android · APK
Package: org.good.cloud.good
Main activity: org.good.cloud.good.MainActivity
Internal version: 20104
Displayed version: 2.1.4
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 (5)

android.permission.INTERNETandroid.permission.POST_NOTIFICATIONSandroid.permission.REQUEST_INSTALL_PACKAGESandroid.permission.WAKE_LOCKorg.good.cloud.good.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Activities (2)

org.good.cloud.good.MainActivity
org.good.cloud.good.Wv

Services (1)

org.good.cloud.good.Bv

Receivers (1)

androidx.profileinstaller.ProfileInstallReceiver

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_FILE

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.heiyingnb.xyz	domain	-	https	Black Hawk	2026-09-30

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.