Mh83pfl50cmom is a browser hijacker that forcibly redirects your web searches and homepage to suspicious sites you never intended to visit. This unwanted program typically arrives bundled with free software downloads, quietly modifying your browser settings without clear consent. Once installed, it proves stubbornly persistent, resetting your preferences even after you manually change them back, and exposing you to potentially malicious advertising networks in the process.
Threat Profile
| Attribute | Details |
|---|---|
| Threat Family | Browser Hijacker / Potentially Unwanted Program (PUP) |
| Also Known As | BrowserModifier:Win32/Mh83pfl50cmom, PUP.Optional.Mh83pfl50cmom |
| Affected Platforms | Windows 7, 8, 10, 11 (all editions); targets Chrome, Firefox, Edge, Internet Explorer |
| Distribution Method | Software bundling, fake updates, deceptive download buttons on freeware sites |
| Typical Installation Path | %LOCALAPPDATA%\[random folder]\, browser extension directories, %APPDATA%\[GUID]\ |
| Persistence Mechanism | Browser extension policies, scheduled tasks, registry Run keys, shortcut modification |
| Primary Payload | Search redirection, homepage hijacking, new-tab override, injected advertisements |
| Secondary Risks | Tracking cookies, affiliate fraud, exposure to additional malware via redirected sites |
| Data Collection | Browsing history, search queries, clicked links, IP address, approximate location |
| Network Indicators | Unexpected DNS queries to unfamiliar search portals, redirects through multiple domains before landing page |
| Removal Difficulty | Moderate — resists basic uninstallation and reapplies settings after manual removal attempts |
| Recommended Tools | Malwarebytes, AdwCleaner, HitmanPro; manual registry and browser cleanup required |
How It Spreads
Mh83pfl50cmom rarely arrives alone or announces itself honestly. The most common infection vector is software bundling, where the hijacker hides inside the installation wizard of seemingly legitimate free programs. Users rushing through setup screens with the "Next" button frequently miss the pre-checked boxes offering "recommended" browser enhancements or search tools. By the time the desired program finishes installing, the hijacker has already configured itself as your default search provider.
Deceptive advertising also plays a major role. Fake "Update Required" warnings on sketchy websites mimic legitimate software update notices, particularly Flash Player or Java updates (both now obsolete, making these warnings inherently suspicious). Download portals for freeware often feature multiple download buttons — some legitimate, others leading to installer packages laced with unwanted programs. Even video streaming sites and torrent platforms display misleading "Download" or "Play" buttons that trigger hijacker installations instead of the content you wanted.
Common distribution channels include:
- Bundled installers from download sites like Softonic, download.com, or lesser-known freeware repositories
- Fake software updates warning that your media player, browser, or PDF reader is out of date
- Malicious advertisements (malvertising) on legitimate sites, triggering drive-by downloads when clicked
- Torrent files and pirated software packages containing modified installers
- Email attachments disguised as invoices, receipts, or document viewers that bundle the hijacker with credential-themed lures
- Browser extension stores offering utilities like weather widgets or currency converters that include hijacking code
What It Does On Your Machine
Once Mh83pfl50cmom establishes itself, it immediately takes control of your browser environment. Your homepage changes to an unfamiliar search portal, your default search engine switches to a site you never selected, and new tabs open to advertising-heavy pages instead of your customary blank page or favorites. These aren't simple preference changes you can reverse in settings — the hijacker actively monitors your browser configuration and reapplies its modifications within seconds of any attempt to change them back.
The redirection mechanism typically works in stages. When you perform a search or click a link, the hijacker intercepts the request and routes it through one or more intermediate domains before delivering results. This chain serves multiple purposes: it obscures the hijacker's command infrastructure, registers affiliate clicks for the operators, and creates opportunities to inject additional advertisements into the results page. The redirected search results often come from legitimate engines like Bing or Google, but they arrive wrapped in the hijacker's advertising framework, making each search session slower and cluttered with sponsored links you never requested.
Beyond the visible annoyances, Mh83pfl50cmom collects data about your browsing habits. The program logs which sites you visit, what you search for, which links you click, and how long you spend on various pages. This information builds a behavioral profile that the hijacker's operators can sell to advertising networks or use to target you with increasingly specific (and potentially manipulative) ads. Some variants also monitor for banking and shopping sites, flagging your sessions for particularly aggressive advertising or even credential phishing attempts.
The hijacker's persistence mechanisms ensure it survives basic removal attempts. It creates scheduled tasks that relaunch the hijacker process if it's terminated, modifies browser shortcuts to include command-line parameters that force the unwanted homepage, and sometimes installs itself as a Windows service. These layers of redundancy mean that removing only the visible components leaves the infection capable of fully restoring itself at the next system restart.
Manual Removal — Step by Step
Disconnect and Document
Disconnect your computer from the internet by unplugging the ethernet cable or disabling Wi-Fi. This prevents the hijacker from downloading additional components or communicating with command servers during removal. Take a quick note or photo of which browsers are affected and any unfamiliar programs you see in the system tray.
Boot Into Safe Mode with Networking
Restart your computer and press F8 repeatedly during boot (or Shift+Restart from Windows 10/11 settings, then Troubleshoot > Advanced > Startup Settings > Restart > press 5 for Safe Mode with Networking). Safe mode loads only essential drivers and services, preventing most hijacker processes from launching automatically and interfering with removal.
Uninstall Suspicious Programs
Open Control Panel > Programs > Programs and Features (or Settings > Apps on Windows 10/11). Sort by installation date and look for unfamiliar entries installed around the time the hijacking began. Uninstall anything named Mh83pfl50cmom or related to the unfamiliar search engine now controlling your browser. Also remove any programs you don't recognize that were installed the same day.
Remove Scheduled Tasks
Press Windows+R, type taskschd.msc, and press Enter to open Task Scheduler. Expand "Task Scheduler Library" and look through the tasks for anything referencing Mh83pfl50cmom, unfamiliar executables in AppData folders, or tasks created recently that you didn't authorize. Right-click suspicious tasks and delete them — they're designed to restart the hijacker even after you remove the files.
Clean Registry Startup Entries
Press Windows+R, type regedit, and press Enter (confirm the UAC prompt). Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run and look for entries pointing to executable files in AppData\Local or AppData\Roaming with random folder names. Right-click and delete any Mh83pfl50cmom entries. Repeat for HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run. Close the registry editor when done.
Delete Hijacker Files
Open File Explorer and enable hidden files (View tab > Show > Hidden items). Navigate to C:\Users\[YourUsername]\AppData\Local\ and C:\Users\[YourUsername]\AppData\Roaming\. Look for folders with random names or GUIDs created around the infection date, especially those containing executable files. Delete the entire folder if it corresponds to the hijacker. Check your Temp folder (%TEMP%) and delete its contents as well.
Reset Each Affected Browser
For Chrome: Settings > Reset settings > Restore settings to original defaults. For Firefox: Help > More Troubleshooting Information > Refresh Firefox. For Edge: Settings > Reset settings > Restore settings to default. This removes malicious extensions, restores your homepage and search engine, and clears hijacker modifications while preserving your passwords and bookmarks.
Run Malwarebytes and AdwCleaner
Download Malwarebytes Free (from malwarebytes.com on a clean device if needed, transfer via USB). Install it in Safe Mode and run a full Threat Scan. Quarantine everything it finds. Then download and run AdwCleaner (also from Malwarebytes) — it specializes in browser hijackers and often catches remnants the main scanner misses. Reboot after cleaning.
Verify and Update Your Security
Restart your computer normally (not Safe Mode). Open your browser and confirm your homepage and search engine are what you set them to be. Run Windows Update to ensure your operating system is fully patched. If you don't have reputable antivirus software, install one now — Microsoft Defender is adequate if kept updated. Change your browser passwords using a different device if you suspect credential theft.
Monitor for Reinfection
Over the next few days, watch for the hijacker's return. If your homepage or search engine changes again, or if unfamiliar processes appear in Task Manager, the infection wasn't completely removed. At that point, professional assistance becomes the practical choice to ensure nothing was missed and to address any rootkit-level persistence that consumer tools can't reach.
Prevention
- Download only from official sources. Get software directly from the developer's website, not from third-party download portals. Sites like Softonic, Download.com, and CNET wrap even legitimate programs in custom installers that include unwanted extras.
- Use the Custom installation option. Never click through an installer with "Express" or "Recommended" settings. Custom/Advanced installation reveals the pre-checked boxes offering toolbars, search engine changes, and homepage modifications. Uncheck everything except the program you actually want.
- Keep a reputable ad-blocker active. Browser extensions like uBlock Origin block most malvertising before it can tempt you with fake download buttons or update warnings. The initial setup takes two minutes and prevents countless headaches.
- Verify update prompts before clicking. If a website tells you to update Flash, Java, or your media player, close the tab and check for updates through the program's official Help menu or the developer's website. Legitimate software updates don't come through random websites.
- Run limited-privilege accounts for daily use. Create a standard user account for web browsing and email, reserving your administrator account for intentional software installation. Many hijackers can't establish system-wide persistence without administrator rights.
- Keep Windows and browsers updated. Enable automatic updates for your operating system and all browsers. Most hijackers exploit known vulnerabilities that patches have already fixed — staying current closes these entry points.
- Review installed programs monthly. Make a habit of opening Programs and Features once a month to check for anything unfamiliar. Catching a hijacker days after installation is better than living with it for months.
- Think before clicking email attachments. If you receive an unexpected invoice, receipt, or document from someone you don't know, don't open it. Even if it looks legitimate, verify through a separate communication channel before downloading anything.
Bring It In
Browser hijackers like Mh83pfl50cmom waste your time with every search and put your personal information at risk with every redirected click. If you've followed the removal steps above and still see unwanted redirects, or if the process seems too technical or time-consuming, we're here to help. Our Roswell shop specializes in complete malware removal — not just running a scanner, but verifying every persistence mechanism is eliminated and your system is truly clean.
We're located at 1655 Old Alabama Rd Suite 129, Roswell, GA 30076, and we're open Monday through Friday 10am to 6pm. Call us at (770) 667-9001 to describe what you're seeing, or just bring your machine in. Most hijacker removals take a few hours, and we'll have you back to normal browsing — with your actual homepage and search engine — the same day. We'll also show you exactly what was removed and how to avoid reinfection, because informed users are protected users.