BrickerBot: IoT Malware Removal Guide

  Category:  MALWARE | 13th April 2026 | Author:  CSI'S TEAM

The Rapid Growth Of Internet Of Things (IoT) Devices Has Brought Convenience And Automation Into Everyday Life, But It Has Also Introduced New Cybersecurity Risks. One Of The Most Concerning Threats In This Space Is The Emergence Of Destructive Malware Like BrickerBot, Sometimes Referred To As BrickBot. This Malware Represents A Significant Evolution In Cyberattacks Targeting Connected Devices, Going Beyond Traditional Botnets To Cause Irreversible Damage.

BrickerBot Primarily Focuses On IoT Devices Such As Routers, IP Cameras, Smart Home Systems, And Other Embedded Devices That Are Often Poorly Secured. Many Of These Devices Are Shipped With Default Or Hardcoded Credentials, Which Users Either Forget To Change Or Cannot Modify. This Creates An Easy Entry Point For Attackers, And BrickerBot Takes Full Advantage Of This Vulnerability.

Unlike Typical Malware That Aims To Quietly Exploit Devices For Data Theft Or Surveillance, BrickerBot Is Designed To Permanently Disable Its Targets. In Cybersecurity Terms, This Is Often Referred To As “bricking” A Device, Meaning The Device Becomes Completely Unusable And Cannot Be Repaired Without Significant Technical Intervention Or Replacement. This Destructive Capability Sets BrickerBot Apart From Earlier IoT Threats.

The Malware Is Widely Considered An Advanced Iteration Of The Mirai Malware Family. While Mirai Gained Notoriety For Building Large Botnets Used In Distributed Denial-of-service (DDoS) Attacks, BrickerBot Takes A More Aggressive Approach. Instead Of Simply Recruiting Devices Into A Botnet, It Destroys Them After Exploitation, Effectively Removing Them From The Network Altogether.

The Attack Process Begins With Scanning. BrickerBot Actively Searches The Internet For IoT Devices That Have Open Telnet Ports, Which Are Commonly Used For Remote Access. Telnet, Being An Outdated And Insecure Protocol, Is Still Enabled On Many Devices, Making It A Prime Target. Once A Vulnerable Device Is Identified, The Malware Initiates A Brute-force Attack Using A List Of Common Username And Password Combinations.

If The Login Attempt Is Successful, The Malware Gains Control Of The Device And Executes A Series Of Commands Designed To Corrupt Its Functionality. These Commands May Overwrite Storage, Disrupt Network Configurations, Or Damage Essential System Files. The Result Is A Device That Can No Longer Operate Normally, Effectively Rendering It Useless.

One Of The Motivations Behind BrickerBot Is Believed To Be A Form Of “vigilante” Cybersecurity. Some Researchers Suggest That The Creator Intended To Remove Insecure Devices From The Internet To Prevent Them From Being Used In Larger Botnet Attacks. However, Regardless Of Intent, The Impact Remains Highly Destructive And Problematic For Device Owners.

The Widespread Presence Of Vulnerable IoT Devices Means That Threats Like BrickerBot Can Spread Rapidly. As More Homes And Businesses Adopt Connected Technologies, The Attack Surface Continues To Expand. This Makes It Critical For Users And Organizations To Take Proactive Security Measures.

To Protect Against Such Malware, Users Should Immediately Change Default Credentials On All IoT Devices And Use Strong, Unique Passwords. Disabling Unnecessary Services Like Telnet And Replacing Them With Secure Alternatives Such As SSH Can Significantly Reduce Risk. Regular Firmware Updates Are Also Essential, As Manufacturers Often Release Patches For Known Vulnerabilities.

In Addition, Network Segmentation Can Help Limit The Damage In Case A Device Is Compromised. By Isolating IoT Devices From Critical Systems, Users Can Prevent Malware From Spreading Across Their Network.

In Conclusion, BrickerBot Highlights The Urgent Need For Improved IoT Security. Its Ability To Exploit Weak Credentials, Scan For Open Ports, And Permanently Disable Devices Demonstrates How Dangerous Modern Malware Has Become. As IoT Adoption Continues To Rise, Prioritizing Security Is No Longer Optional—it Is A Necessity.

Key Capabilities Of BrickerBot / BrickBot Malware (Explained In Detail)

• Exploits Hardcoded Passwords In IoT Devices
  BrickerBot Actively Targets Internet Of Things (IoT) Devices That Rely On Default Or Hardcoded Login Credentials. Many Manufacturers Ship Devices With Preset Usernames And Passwords That Users Either Forget To Change Or Are Unable To Modify. The Malware Leverages This Weakness To Gain Unauthorized Access. Once Inside, It Can Execute Malicious Commands That Compromise The System At A Deep Level. This Highlights A Major Flaw In IoT Security Practices, Where Convenience Often Outweighs Protection.

• Corrupts Device Storage And System Integrity
  After Gaining Access, The Malware Proceeds To Damage The Internal Storage Of The Device. It May Overwrite Critical System Files, Erase Important Configurations, Or Manipulate Firmware Components. This Corruption Disrupts The Device’s Ability To Function Properly. In Many Cases, The Damage Is So Severe That The Device Cannot Reboot Or Recover, Effectively Rendering It Unusable Without Advanced Technical Repair.

• Targets Hardware Leading To Physical Damage
  One Of The Most Dangerous Aspects Of BrickerBot Is Its Ability To Go Beyond Software-level Attacks And Impact Hardware Functionality. By Sending Destructive Commands To System-level Components, The Malware Can Interfere With Memory Chips And Storage Controllers. This May Result In Permanent Hardware Damage, Making The Device Irreparable. Such Attacks Blur The Line Between Software Exploitation And Physical Destruction.

• Disrupts Internet Connectivity And Device Performance
  Compromised Devices Often Experience Severe Performance Degradation. The Malware Can Alter Network Configurations, Disable Connectivity Features, Or Overload System Resources. As A Result, Devices May Lose Internet Access, Become Unresponsive, Or Behave Unpredictably. This Not Only Affects Individual Devices But Can Also Disrupt Entire Networks, Especially In Environments With Multiple Connected Systems.

• Wipes Files And Critical Data
  BrickerBot Is Designed To Remove Essential Files From Infected Devices. This Includes System Logs, Configuration Files, And Operational Data Required For Normal Functioning. The Wiping Process Ensures That Recovery Becomes Extremely Difficult, As The Device Loses The Information Needed To Restore Itself. This Destructive Behavior Is A Key Reason Why The Malware Is Considered More Aggressive Than Traditional Botnet Threats.

• Performs Telnet Brute Force Attacks
  The Malware Scans The Internet For Devices With Open Telnet Ports (commonly Port 23). Once A Target Is Found, It Launches A Brute-force Attack Using A List Of Common Credential Combinations. Telnet Is An Outdated Protocol That Lacks Encryption, Making It An Easy Target For Attackers. Devices With Exposed Telnet Services Are Especially Vulnerable, Allowing The Malware To Quickly Gain Control.

• Targets Specific Device Paths Like /dev/mtd And /dev/mmc
  BrickerBot Specifically Interacts With Low-level Device Files Such As “/dev/mtd” (Memory Technology Device) And “/dev/mmc” (Multimedia Card). These Paths Are Directly Associated With Storage Hardware In Embedded Systems. By Writing Malicious Data To These Locations, The Malware Can Destroy Firmware And Storage Partitions, Ensuring The Device Cannot Boot Or Operate Normally.

• Attacks Devices With Open Port 22 And Outdated Dropbear SSH
  In Addition To Telnet, The Malware Also Targets Devices Running SSH Services On Port 22, Particularly Those Using Outdated Versions Of Dropbear SSH. Older Implementations Often Contain Vulnerabilities That Can Be Exploited For Unauthorized Access. By Leveraging These Weaknesses, BrickerBot Expands Its Attack Surface And Compromises A Wider Range Of IoT Devices.

• Focuses On Permanently Disabling Devices (Bricking)
  Unlike Traditional Malware That Uses Devices For Botnet Activities, BrickerBot’s Primary Objective Is Destruction. It Intentionally “bricks” Devices, Making Them Permanently Unusable. This Approach Not Only Removes Vulnerable Devices From Networks But Also Causes Financial Loss And Operational Disruption For Users.

• Expands Rapidly Due To Widespread IoT Vulnerabilities
  The Large Number Of Insecure IoT Devices Connected To The Internet Makes It Easy For BrickerBot To Spread. Weak Security Configurations, Lack Of Updates, And Exposed Services Contribute To Its Rapid Propagation. This Emphasizes The Urgent Need For Stronger Security Practices In The IoT Ecosystem.

The Malware Operates In Two Versions Namely, BrickerBot1 And BrickerBot2.Details Are Given Below:

BrickerBot 1:

It Targets Devices Which Are:

• Running BusyBox With An Exposed Telnet Command Window.
• Running Older Versions Of Dropbear SSH Server Leading To SSH Exposure (port 22).
• Running Outdated Firmware Specially Ubiquiti Network Devices. Note: According To Radware, BrickerBot1 Attacks Have Been Ceased.

BrickerBot 2:

It Targets Devices Which Are:

• Linux-based Devices Which May Or May Not Running BusyBox.
• Such Devices Are Using Default/hardcoded Password Along With Exposed Telnet Service.
• Make Use Of TOR Exit Nodes.

Attack Methodology:

• Perform Telnet Bruteforce Attack On The Discovered Devices With Open Telnet Ports.
• Upon Successful Access To The Device, The Malware Executes Series Of Linux Commands To Corrupt Storage, Disrupt Internet Connectivity, Affect Device Performance, Wipe Files On The Compromised Device. These Commands Also Lead To The Launch Of The PDoS Attacks On The Compromised Devices.

Note: Unlike Mirai, This Malware Does Not Make Use Of Any Binaries So The Complete List Of Default Credentials Used By The Attacker Is Not Available, Some Of The Default Credentials Used For Brute Force Attack Are "root"/ "vizxv", "root/root".

Countermeasures:

• Restrict Web Management Interface Access Of IoT Devices To Authorized Users Only And Change Default Username/passwords.
• Always Change Default Login Credentials Before Deployment In Production.
• Disable Telnet Access To The Device.
• Change Default Credentials At Device Startup And Ensure That Passwords Meet The Minimum Complexity.
• Disable Universal Plug And Play (UPnP) On IoT Devices Unless Absolutely Required.
• Users Should Be Aware Of The Installed Devices And Their Capabilities. If A Device Comes With A Default Password Or An Open Wi-Fi Connection, Users Should Change The Password And Only Allow It To Operate On A Home Network With A Secured Wi-Fi Router.
• Control Access To The Devices With Access List.
• Configure Devices To "lock" Or Log Out And Require A User To Re-authenticate If Left Unattended.
• Identify Systems With Default Passwords And Implement Abovementioned Measures. Some The Systems That Need To Examined Are Routers, Switches, Web Applications And Administrative Web Interfaces, ICS Systems, Telnet And SSH Interfaces.
• Implement Account Lockout Policies To Reduce The Risk Of Brute Forcing Attacks.
• Telnet And SSH Should Be Disabled On Device If There Is No Requirement Of Remote Management.
• Configure VPN And SSH To Access Device If Remote Access Is Required.
• Configure Certificate Based Authentication For Telnet Client For Remote Management Of Devices.
• Implement Egress And Ingress Filtering At Router Level.
• Report Suspicious Entries In Routers To Your Internet Service Provider.
• Keep Up To Date Antivirus On The Computer System.
• Keep Up-to-date On Patches And Fixes On The IoT Devices, Operating System And Applications.
• Unnecessary Port And Services Should Be Stopped And Closed.
• Logging Must Be Enabled On The Device To Log All The Activities.
• Enable And Monitor Perimeter Device Logs To Detect Scan Attempts Towards Critical Devices/systems.

Countermeasure For Preventing DDoS Attacks:

• Identify Critical Services And Their Priority. Develop Business Continuity Plan.
• Deploy Appropriate Intrusion/DDoS Prevention System Capable Of Detecting And Mitigating DDoS Attacks.
• Ensure That Intrusion/DDoS Prevention System Contain Signatures To Detect The Attacks Launched From Common DDoS Tools.
• Maintain List Of Contacts Of ISPs, Vendors Of Network And Security Devices And Contact Them As Appropriate.
• Understand Your Current Environment, And Have A Baseline Of The Daily Volume, Type, And Performance Of Network Traffic.
• Review The Traffic Patterns And Logs Of Perimeter Devices To Detect Anomalies In Traffic, Network Level Floods (TCP,UDP, SYN, Etc) And Application Floods (HTTP GET).
• Maintain And Regularly Examine Logs Of Webservers To Detect Malformed Requests/traffic.
• In Case Your SLA With ISP Includes DDoS Mitigation Services Instruct Your Staff About The Requirements To Be Sent To ISP.

Conclusion

BrickerBot Is A Highly Destructive Malware That Exploits Common IoT Weaknesses To Cause Irreversible Damage. Its Ability To Brute-force Access, Corrupt Storage, And Target Hardware Components Makes It A Serious Cybersecurity Threat. Strengthening Device Security, Disabling Unnecessary Services, And Updating Firmware Are Essential Steps To Defend Against Such Attacks.

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.