Android: BlackRock Trojan Virus – Complete Analysis, Indicators Of Compromise (IOCs), MITRE ATT

  Category:  RANSOMWARE | 7th July 2026 | Author:  CSI'S TEAM

Introduction

BlackRock Is A Sophisticated Android Banking Trojan That Emerged In 2020 And Quickly Gained Attention Within The Cybersecurity Community Due To Its Extensive Targeting Capabilities And Advanced Credential Theft Features. Built Upon The Source Code Of The Earlier Xerxes Banking Malware Family, BlackRock Significantly Expanded Its Functionality By Targeting Hundreds Of Financial, Social Media, E-commerce, Communication, And Cryptocurrency Applications.

Unlike Traditional Android Malware That Focuses Solely On Banking Applications, BlackRock Employs Overlay Attacks, Accessibility Service Abuse, Keylogging-like Behavior, SMS Interception, Screen Monitoring, And Credential Theft Techniques To Compromise A Broad Range Of Mobile Applications. The Malware Is Capable Of Stealing Usernames, Passwords, Payment Card Information, Authentication Tokens, And Cryptocurrency Wallet Credentials.

The BlackRock Trojan Primarily Spreads Through Malicious Android Package Kit (APK) Files Distributed Via Third-party App Stores, Phishing Campaigns, Fake Software Updates, And Malicious Websites. Once Installed, It Requests Android Accessibility Service Permissions, Allowing It To Gain Extensive Control Over The Infected Device.

This Article Provides A Detailed Technical Overview Of The Android BlackRock Trojan, Including Affected Operating Systems, Targeted Applications, Infection Statistics, Countries Impacted, Indicators Of Compromise (IOCs), MITRE ATT&CK Mappings, Detection Rules, And Frequently Asked Questions.

Overview Of BlackRock Trojan

BlackRock Became Particularly Dangerous Because It Expanded Its Target List To Include More Than 300 Android Applications Across Multiple Industries.

How BlackRock Infects Android Devices?

The BlackRock Infection Process Generally Follows These Stages:

Stage 1: Initial Delivery

Victims Download:

• Fake Application Updates

• Malicious APK Files

• Cracked Mobile Applications

• Fake Google Services

• Fraudulent Utility Applications

Stage 2: Installation

The User Manually Installs The APK And Grants Requested Permissions.

Stage 3: Accessibility Service Abuse

The Malware Requests:

• Accessibility Permissions

• Overlay Permissions

• Device Administrator Privileges

These Permissions Allow BlackRock To Monitor User Activity And Interact With Applications.

Stage 4: Command-and-Control Communication

The Malware Contacts A Remote Server To:

• Register The Infected Device

• Receive Commands

• Download Updated Configurations

• Report Stolen Credentials

Stage 5: Credential Theft

BlackRock Launches Fake Login Overlays Over Legitimate Applications To Harvest Credentials.

Operating Systems Affected

BlackRock Specifically Targets Android Operating Systems.

Known Affected Android Versions

• Android 5.0 Lollipop

• Android 6.0 Marshmallow

• Android 7.0 Nougat

• Android 8.0 Oreo

• Android 9 Pie

• Android 10

• Android 11 (certain Variants)

The Malware Relies Heavily On Accessibility Service Abuse, Making Devices With Weaker Permission Management Particularly Vulnerable.

iOS Devices

No Confirmed BlackRock Variants Have Been Identified Targeting Apple's IOS Platform.

Windows And MacOS

BlackRock Is Designed Specifically For Android Devices And Does Not Infect Windows Or MacOS Systems.

Applications And Browsers Targeted By BlackRock

One Of BlackRock's Defining Characteristics Is Its Massive Target List.

Mobile Browsers At Risk

The Malware Can Target Credentials Entered Into Mobile Browsers, Including:

• Google Chrome

• Mozilla Firefox

• Opera Browser

• Microsoft Edge

• Samsung Internet Browser

• Brave Browser

Data Targeted

• Saved Passwords

• Session Cookies

• Authentication Tokens

• Autofill Data

• Financial Information

Browser Extensions And Add-ons

Traditional Browser Extensions Are Less Common On Android Than Desktop Platforms.

However, BlackRock May Indirectly Compromise:

• Password Manager Integrations

• Cryptocurrency Wallet Add-ons

• Browser Synchronization Tokens

• Authentication Extensions

Potentially Exposed Data Includes:

• Login Credentials

• Wallet Information

• Session Tokens

• Cloud Synchronization Credentials

Applications Commonly Targeted

BlackRock Expanded Beyond Banking Apps And Targeted Hundreds Of Services.

Financial Applications

Examples Include:

• Banking Applications

• Credit Union Apps

• Investment Platforms

• Mobile Payment Systems

Cryptocurrency Platforms

Examples Include:

• Crypto Exchanges

• Mobile Wallets

• Trading Applications

Social Media Platforms

• Facebook

• Instagram

• Twitter/X

• Snapchat

• TikTok

Communication Applications

• WhatsApp

• Telegram

• Skype

• Signal

E-Commerce Applications

• Amazon

• eBay

• AliExpress

Enterprise Applications

• Microsoft Outlook

• Microsoft Teams

• Enterprise VPN Clients

• Corporate Authentication Apps

Files Associated With BlackRock Infections

Unlike Ransomware, BlackRock Does Not Focus On Encrypting User Files. Instead, It Uses Malicious APK Files And Configuration Files.

Common File Types

Installation Packages

.apk

Configuration Files

.json
.xml
.cfg

Log Files

.log

Downloaded Modules

.dex
.jar

Stolen Data Archives

.zip
.tmp
.dat

Device Information Collected

BlackRock Gathers Extensive Device Intelligence.

System Information

• Device Model

• Android Version

• Installed Applications

• Language Settings

• Country Settings

User Information

• Usernames

• Passwords

• Banking Credentials

• Cryptocurrency Credentials

Communication Data

• SMS Messages

• Contact Information

• Notifications

Authentication Data

• MFA Codes

• OTP Messages

• Session Tokens

How Many Systems Were Affected?

The Precise Number Of BlackRock Infections Remains Unknown Because Infections Occurred Globally And Across Multiple Malware Campaigns.

Security Researchers Reported:

• Hundreds Of Active Malware Campaigns.

• Tens Of Thousands Of Malicious APK Downloads.

• Large-scale Targeting Of Android Users Worldwide.

• More Than 300 Applications Targeted For Credential Theft.

Based On Industry Reporting And Malware Telemetry, BlackRock Likely Infected Tens Of Thousands Of Android Devices Globally During Peak Activity Periods.

Because Many Infections Occurred Through Unofficial App Stores And Phishing Campaigns, The True Number Of Affected Devices May Be Significantly Higher.

Countries Impacted By BlackRock

BlackRock Was Designed For Global Operations Rather Than A Single Region.

Frequently Targeted Countries

• United States

• Canada

• United Kingdom

• Germany

• France

• Italy

• Spain

• Netherlands

• Australia

• India

• Brazil

• Mexico

• Russia

• Turkey

• South Africa

The Malware Dynamically Selected Overlays Based On The Victim's Installed Applications Rather Than Geographic Location.

Persistence Mechanisms

BlackRock Uses Several Techniques To Remain Active.

Common Persistence Methods

• Accessibility Service Abuse

• Device Administrator Permissions

• Auto-start Registration

• Background Service Execution

• Screen Event Monitoring

These Mechanisms Help The Malware Survive Reboots And Continue Credential Theft Operations.

Android: BlackRock Trojan Indicators Of Compromise (IOCs)

The Following Indicators Are Representative Examples Associated With BlackRock Activity. Organizations Should Validate Them Against Current Threat Intelligence Before Deployment.

Suspicious APK Names

Google Update.apk
System Update.apk
Flash Player.apk
Security Update.apk
Chrome Update.apk

Suspicious Permissions

BIND_ACCESSIBILITY_SERVICE
RECEIVE_SMS
READ_SMS
SEND_SMS
SYSTEM_ALERT_WINDOW
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS

Malicious Behaviors

• Accessibility Service Abuse

• Overlay Screen Creation

• SMS Interception

• OTP Theft

• Credential Harvesting

• Application Enumeration

• Remote Command Execution

Registry Equivalent Indicators (Android)

Although Android Lacks A Traditional Registry, Indicators Include:

Accessibility Service Enabled Unexpectedly
Unknown Device Administrator Enabled
Untrusted APK Installed

Network Indicators

Organizations Should Investigate:

• Connections To Unknown Command-and-control Servers

• Frequent Outbound POST Requests

• Encrypted Communications With Suspicious Domains

• Dynamic DNS Infrastructure

MITRE ATT&CK Techniques

BlackRock Aligns Closely With Techniques Documented In The MITRE ATT&CK Framework For Mobile Threats.

MITRE ATT&CK Tactics

BlackRock Activity Spans Multiple ATT&CK Tactics:

• Initial Access

• Execution

• Persistence

• Privilege Escalation

• Defense Evasion

• Discovery

• Credential Access

• Collection

• Command And Control

Detection Rules

Sigma Rule – Accessibility Service Abuse

title: Android Accessibility Service Abuse
Id: Blackrock-accessibility-detection
Status: Experimental

Logsource:
  Product: Android

Detection:
  Selection:
    Permission:
      - BIND_ACCESSIBILITY_SERVICE

  Condition: Selection

Level: High

Sigma Rule – Suspicious SMS Access

title: Suspicious SMS Permission Request
Id: Blackrock-sms-theft
Status: Experimental

Logsource:
  Product: Android

Detection:
    Selection:
      Permission:
        - READ_SMS
        - RECEIVE_SMS
        - SEND_SMS

    Condition: Selection

Level: High

YARA Rule Example

rule Android_BlackRock_Trojan
{
    Meta:
        Description = "Detect BlackRock Android Trojan"

    Strings:
        $a = "AccessibilityService"
        $b = "SYSTEM_ALERT_WINDOW"
        $c = "READ_SMS"

    Condition:
        Any Of Them
}

Behavioral Detection Opportunities

Security Teams Should Monitor For:

• Unexpected Accessibility Service Activation

• Overlay Attacks Targeting Banking Apps

• Unauthorized SMS Access

• OTP Interception Attempts

• Installation Of Unsigned APKs

• Device Administrator Abuse

• Excessive Application Enumeration

• Communication With Suspicious C2 Servers

Prevention And Mitigation

User Recommendations

• Install Applications Only From Trusted Sources.

• Avoid Downloading APK Files From Unofficial Stores.

• Verify Application Permissions Before Installation.

• Disable Unknown Source Installations.

Enterprise Controls

• Mobile Device Management (MDM)

• Mobile Threat Defense (MTD)

• Application Allowlisting

• Endpoint Monitoring

Security Best Practices

• Enable Google Play Protect.

• Keep Android Devices Updated.

• Use Multi-factor Authentication.

• Monitor Mobile Device Logs.

• Restrict Accessibility Service Permissions.

Frequently Asked Questions (FAQ)

What Is BlackRock Trojan?

BlackRock Is An Android Banking Trojan Designed To Steal Credentials, Intercept SMS Messages, Perform Overlay Attacks, And Compromise Financial Accounts.

Is BlackRock Ransomware?

No. BlackRock Is Primarily A Banking Trojan And Credential-stealing Malware Rather Than A Ransomware Family.

How Does BlackRock Spread?

It Spreads Through Malicious APK Files, Phishing Campaigns, Fake Software Updates, Unofficial App Stores, And Trojanized Applications.

Which Operating Systems Are Affected?

BlackRock Primarily Targets Android Devices Running Android 5 Through Android 11 And Related Variants.

What Information Does BlackRock Steal?

The Malware Can Steal:

• Banking Credentials

• Credit Card Information

• Cryptocurrency Wallet Credentials

• Social Media Logins

• Authentication Tokens

• SMS-based OTP Codes

Can BlackRock Bypass Multi-factor Authentication?

Yes. Through SMS Interception And Notification Monitoring, BlackRock May Capture One-time Passwords And Authentication Codes.

How Many Applications Can BlackRock Target?

Researchers Identified Targeting Configurations For More Than 300 Applications, Including Banking, Cryptocurrency, Communication, And Social Media Services.

How Many Systems Were Affected?

Although Exact Figures Are Unavailable, Security Researchers Estimate That Tens Of Thousands Of Android Devices Were Potentially Infected Worldwide.

Which Countries Were Affected?

BlackRock Campaigns Impacted Users Globally, Including The United States, United Kingdom, Germany, France, Australia, India, Brazil, Canada, And Many Other Countries.

How Can Organizations Detect BlackRock?

Detection Can Be Achieved Through Mobile Threat Defense Solutions, Behavioral Analytics, ATT&CK-based Threat Hunting, Permission Monitoring, Network Traffic Analysis, And IOC Correlation.

Can BlackRock Be Removed?

Yes. In Most Cases, Removal Involves Revoking Administrator Privileges, Disabling Malicious Accessibility Services, Uninstalling The Malicious APK, And Conducting A Full Mobile Security Scan.

Conclusion

BlackRock Represents One Of The Most Capable Android Banking Trojans Observed In Recent Years. By Leveraging Accessibility Service Abuse, Overlay Attacks, SMS Interception, Credential Theft, And Extensive Application Targeting, It Significantly Increased The Threat Posed To Android Users Worldwide. Its Ability To Target More Than 300 Applications—including Banking, Cryptocurrency, Enterprise, And Social Media Services—demonstrates The Growing Sophistication Of Mobile Malware Ecosystems.

Organizations And Individuals Can Reduce Risk By Enforcing Strict Application Installation Policies, Monitoring Accessibility Service Usage, Deploying Mobile Threat Defense Solutions, And Maintaining Up-to-date Android Security Controls. Continuous Monitoring For BlackRock Indicators, ATT&CK Techniques, And Suspicious Permission Abuse Remains Critical For Effective Detection And Response.

Malware Removal Guide For PC

Malware Removal Guide For Web Browsers

Prevent Future Malware

Summary - Malware Removal Guide

Guide For VPN Uses

Malware Removal Guide – PC And Web Browser

PART 1: Remove Malware From Your PC (Windows)

Step 1: Boot Into Safe Mode

• Restart Your PC And Press F8 (or Shift + F8 For Some Systems) Before Windows Loads.

• Choose Safe Mode With Networking.

Safe Mode Prevents Most Malware From Loading.

Step 2: Uninstall Suspicious Programs

1. Press Win + R, Type appwiz.cpl, And Press Enter.

2. Sort By Install Date And Uninstall Unknown Or Recently Added Programs.

Step 3: Run A Malware Scan

Use A Trusted Anti-malware Tool:

Malwarebytes – https://www.malwarebytes.com

Screenshot Of Malwarebytes - Visit Links

Microsoft Defender – Built Into Windows 10/11

HitmanPro, ESET Online Scanner, Or Kaspersky Virus Removal Tool

ZoneAlarm Pro Antivirus + Firewall NextGen

VIPRE Antivirus - US And Others Countries, | India

VIPRE Antivirus - Mac

F-Secure Total - Global

Run A Full Scan And Delete/quarantine Detected Threats.

Step 4: Delete Temporary Files

1. Press Win + R, Type temp → Delete All Files.

2. Press Win + R, Type %temp% → Delete All Files.

3. Use Disk Cleanup: cleanmgr In The Run Dialog.

Step 5: Reset Hosts File

1. Go To: C:\Windows\System32\drivers\etc

2. Open hosts File With Notepad.

3. Replace With Default Content:

Step 6: Check Startup Programs

1. Press Ctrl + Shift + Esc → Open Task Manager

2. Go To Startup Tab

3. Disable Any Suspicious Entries.

Step 7: Reset Network Settings

1. Open Command Prompt As Administrator.

2. Run These Commands:

netsh Winsock Reset

netsh Int Ip Reset

ipconfig /flushdns

PART 2: Remove Malware From Web Browsers

? Common Signs Of Malware In Browser:

• Unwanted Homepage Or Search Engine

• Pop-ups Or Redirects

• Unknown Extensions Installed

Step 1: Remove Suspicious Extensions

For Chrome:

• Go To: chrome://extensions/

• Remove Anything Unfamiliar

For Firefox:

• Go To: about:addons → Extensions

• Remove Suspicious Add-ons

For Edge:

• Go To: edge://extensions/

• Uninstall Unknown Add-ons

Step 2: Reset Browser Settings

Chrome:

• Go To chrome://settings/reset → "Restore Settings To Their Original Defaults"

Firefox:

• Go To about:support → "Refresh Firefox"

Edge:

• Go To edge://settings/resetProfileSettings → "Reset Settings"

Step 3: Clear Cache And Cookies

All Browsers:

• Use Ctrl + Shift + Del → Select All Time

• Clear Cookies, Cached Files, And Site Data

Step 4: Check Search Engine & Homepage Settings

Make Sure They Are Not Hijacked.

• Chrome: chrome://settings/search

• Firefox: about:preferences#search

• Edge: edge://settings/search

Step 5: Use Browser Cleanup Tools (Optional)

• Chrome: chrome://settings/cleanup

• Use Malwarebytes Browser Guard For Real-time Browser Protection.

FINAL TIPS: Prevent Future Malware

• Always Download Software From Trusted Sources.

• Keep Windows, Browsers, And Antivirus Updated.

• Avoid Clicking Suspicious Links Or Ads.

• Use ad Blockers And reputable Antivirus Software.

• Backup Your Files Regularly.

Short Summary: Malware Removal Guide (PC & Web Browser)

To Remove Malware From Your Windows PC, Start By Booting Into Safe Mode, Uninstalling Suspicious Programs, And Scanning With Trusted Anti-malware Tools Like Malwarebytes. Clear Temporary Files, Reset Your Network Settings, And Check Startup Apps For Anything Unusual.

For web Browsers, Remove Unwanted Extensions, Reset Browser Settings, Clear Cache And Cookies, And Ensure Your Homepage And Search Engine Haven’t Been Hijacked. Use Cleanup Tools Like Chrome Cleanup Or Browser Guard For Added Protection.

?? Prevention Tips: Keep Software Updated, Avoid Suspicious Downloads, And Use Antivirus Protection Plus Browser Ad Blockers. Regular Backups Are Essential.

VPN - How To Use IT

1. Choose A Trusted VPN Provider

• Why It Matters: Not All VPNs Offer Malware Protection.

• What To Look For: Providers With built-in Malware/ad/tracker Blockers (e.g., NordVPN’s Threat Protection, ProtonVPN’s NetShield).

• Nord VPN
• Hide.me VPN

2. Enable Kill Switch

• Purpose: Prevents Data Leaks If Your VPN Connection Drops.

• Benefit: Ensures Your Real IP And Browsing Activity Aren’t Exposed To Malware-distributing Websites.

3. Use VPN With DNS Leak Protection

• Why It Matters: DNS Leaks Can Expose Your Online Activity To Attackers.

• Solution: Enable DNS Leak Protection In Your VPN Settings Or Use A Secure DNS Like Cloudflare (1.1.1.1).

4. Avoid Free VPNs

• Risk: Free VPNs Often Contain Malware, Sell User Data, Or Lack Security Features.

• Better Option: Use Reputable Paid VPNs That Offer security Audits And Transparent Privacy Policies.

5. Use VPN With Anti-Phishing Tools

• Some VPNs Block Known Phishing And Malicious Sites.

• Example: Surfshark’s CleanWeb, CyberGhost’s Content Blocker.

6. Keep Your VPN App Updated

• Reason: Security Patches Fix Known Vulnerabilities.

• Tip: Enable Auto-updates Or Check For Updates Weekly.

. Use VPN On All Devices

• Scope: Malware Can Enter Through Phones, Tablets, Or IoT Devices.

• Solution: Install VPN Apps On Every Internet-connected Device.

8. Don’t Rely On VPN Alone

• Fact: VPNs Do Not Remove Or Detect Malware On Your System.

• Complement It With:

  • Antivirus Software

  • Firewall

  • Browser Extensions For Script Blocking

9. Avoid Clicking Unknown Links While VPN Is On

• VPN Encrypts Traffic But Can’t Stop Malware From Executing If You Download Infected Files.

10. Use VPN With Split Tunneling Cautiously

• Split Tunneling Allows Certain Apps/sites To Bypass VPN.

• Tip: Never Exclude Browsers, Email Clients, Or Download Managers From VPN Tunneling.

Short Note - VPN Uses

A VPN (Virtual Private Network) Enhances Your Online Privacy By Encrypting Your Internet Traffic And Masking Your IP Address. It Protects Your Data On Public Wi-Fi, Hides Browsing Activity From Hackers And ISPs, And Helps Bypass Geo-restrictions. VPNs Also Add A Layer Of Defense Against Malware By Blocking Malicious Websites And Trackers When Using Advanced Features. However, A VPN Does Not Remove Existing Malware Or Act As Antivirus Software. For Full Protection, Combine VPN Use With Antivirus Tools, Regular Software Updates, And Cautious Browsing Habits. Always Choose A Reputable VPN Provider With Strong Security And Privacy Policies.