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www.rivitmedia.com > Blog > Cyber Threats > Adware > Bireme.app Adware
AdwareMac MalwareMalware

Bireme.app Adware

Pirrit-based adware flooding Macs with intrusive ads and data theft.

riviTMedia Research
Last updated: June 25, 2025 5:49 pm
riviTMedia Research
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A routine VirusTotal submission on June 23, 2025 exposed Bireme.app, a new member of the notorious Pirrit adware family that quietly installs on macOS systems under the guise of a legitimate application. A recent analysis showed unsuspecting users encountering relentless pop-ups and unwanted browser redirects after bundling Bireme.app with free downloads—often without consent. What happens when your Mac slows to a crawl and your privacy vanishes into the hands of cybercriminals?

Contents
Threat OverviewIn-Depth AnalysisInfection VectorBehavioral ProfileRisk AssessmentMethod 1: Manually Removing Adware from Your MacStep 1: Uninstall Suspicious ApplicationsStep 2: Remove Unwanted Browser ExtensionsSafariGoogle ChromeMozilla FirefoxStep 3: Delete Malicious Files and FoldersStep 4: Clear Your DNS CacheStep 5: Restart Your MacMethod 2: Automatically Remove Adware with SpyHunter for MacStep 1: Download SpyHunterStep 2: Install and Set Up SpyHunterStep 3: Run a Full System ScanStep 4: Restart Your MacConclusion

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✅ Removes malware

✅ Prevents scams

✅ Detects trojans

Don’t leave your system unprotected. Download SpyHunter today for free, and scan your device for malware, scams, or any other potential threats. Stay Protected!


Threat Overview

Adware, or advertising-supported software, injects third-party content—pop-ups, banners, overlays—into webpages and desktops to generate illicit revenue. While some ads may appear legitimate, they often promote scams, untrustworthy software, or even malware. Bireme.app adds a layer of data tracking—collecting browsing histories, cookies, and potentially sensitive credentials—to monetize user information through third-party sales.


In-Depth Analysis

Infection Vector

Most often, Bireme.app slips in through software bundling—hidden within “custom” installers on freeware sites, P2P networks, or torrent downloads. Intrusive ads or mistyped URLs redirect victims to malicious landing pages that launch silent downloads.

Behavioral Profile

  1. Installation: Drops “Bireme.app” into /Applications and creates launch agents/daemons under /Library/LaunchAgents, /Library/LaunchDaemons, or similar directories.
  2. Ad Injection: Hooks into browsers to display pop-ups, overlays, and redirect scripts, often triggering unwanted downloads when clicked.
  3. Data Tracking: Monitors search history, cookies, and possibly captures credentials for sale on underground markets.
  4. Persistence: Creates plist files (*.plist) to auto-launch at boot, surviving simple uninstalls.

Risk Assessment

Although not outright destructive, Bireme.app poses a significant privacy threat. During the 2018 Pirrit adware surge, victims reported identity theft and financial scams following their credential data leaks. If advertisements lead to exploit kits, the adware can become a gateway for more severe infections. Early detection remains crucial to prevent cascading harms.


Artifact – Pop-Up Warning
“Bireme.app” will damage your computer.

This file was downloaded on an unknown date.

Ok | Show in Finder

Method 1: Manually Removing Adware from Your Mac

Scan Your System for Viruses

✅ Free Scan Available 

✅13M Scans/Month

✅Instant Detection

Download SpyHunter for Free

✅ Removes ransomware

✅ Prevents scams

✅ Detects trojans

Don’t leave your system unprotected. Download SpyHunter today for free, and scan your device for malware, scams, or any other potential threats. Stay Protected!

Step 1: Uninstall Suspicious Applications

  1. Open Finder and navigate to Applications.
  2. Carefully review the list and look for applications you don’t recognize or didn’t install.
  3. Drag any suspicious applications to the Trash.
  4. Empty the Trash to ensure they’re permanently removed.
  5. Open System Preferences > Users & Groups > Login Items.
  6. Remove any unknown startup programs by selecting them and clicking the - button.

Step 2: Remove Unwanted Browser Extensions

Safari

  1. Open Safari and click Safari > Preferences > Extensions.
  2. Look for any extensions you don’t recognize and uninstall them.
  3. Go to History > “Clear History” to remove traces of adware-related activity.

Google Chrome

  1. Click the three-dot menu in the top-right corner and select Extensions.
  2. Find any unfamiliar extensions and remove them.
  3. Reset Chrome by going to Settings > Reset settings > “Restore settings to their original defaults.”

Mozilla Firefox

  1. Click the three-line menu and go to Add-ons and themes.
  2. Remove any unknown extensions.
  3. Reset Firefox via Help > More troubleshooting information > “Refresh Firefox.”

Step 3: Delete Malicious Files and Folders

  1. Open Finder, press Shift + Command + G, and enter the following locations:
    • ~/Library/Application Support/
    • ~/Library/LaunchAgents/
    • ~/Library/LaunchDaemons/
    • ~/Library/Preferences/
  2. Look for suspicious files and remove them.

Step 4: Clear Your DNS Cache

  1. Open Terminal.
  2. Type the following command and hit Enter:
  3. Enter your administrator password if prompted.

Step 5: Restart Your Mac

Restart your Mac to finalize the removal process.


Method 2: Automatically Remove Adware with SpyHunter for Mac

If you prefer a hassle-free solution, SpyHunter for Mac can detect and eliminate adware efficiently.

Scan Your System for Viruses

✅ Free Scan Available 

✅13M Scans/Month

✅Instant Detection

Download SpyHunter for Free

✅ Removes ransomware

✅ Prevents scams

✅ Detects trojans

Don’t leave your system unprotected. Download SpyHunter today for free, and scan your device for malware, scams, or any other potential threats. Stay Protected!

Step 1: Download SpyHunter

Click the link below to download SpyHunter for Mac: Download SpyHunter Here.

Step 2: Install and Set Up SpyHunter

  1. Open the downloaded .dmg file.
  2. Drag SpyHunter into the Applications folder.
  3. Launch SpyHunter and allow it to update its malware definitions.

Step 3: Run a Full System Scan

  1. Open SpyHunter.
  2. Click Start Scan.
  3. Wait for the scan to complete and review the detected threats.
  4. Click Fix Threats to remove any adware found on your system.

Step 4: Restart Your Mac

Once SpyHunter has completed the removal, restart your Mac to ensure all traces of adware are gone.

Download SpyHunter 5
Download SpyHunter for Mac

Conclusion

Bireme.app leverages familiar bundling tactics and Pirrit’s adware blueprint to infiltrate macOS devices, degrade performance, and siphon private data. Prompt removal of its components and browser extensions halts unwanted ads and restores system integrity. Vigilance when installing software and regular scans with reputable anti-malware tools ensure Bireme.app never gains a foothold.

Scan Your Your Device for Bireme.app Adware

✅ Free Scan 

✅13M Scans/Month

✅Instant Detection

Download SpyHunter 5
Download SpyHunter for Mac

✅ Removes malware

✅ Prevents scams

✅ Detects trojans

Don’t leave your system unprotected. Download SpyHunter today for free, and scan your device for malware, scams, or any other potential threats. Stay Protected!

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TAGGED:Adware removaladware tracking analyticsAntivirus softwarebundling malware preventioncomputer viruscyber attackCybersecurityCybersecurity threatscybersecurity toolsdata breachdigital forensicsencrypted malwareendpoint protectionfirewall protectionidentity theft preventionindustrial control system attackinformation securityinternet safetyMac privacy risksmacOS adware familymacOS security best practicesMalicious softwaremalware removalmalware scannermobile banking trojannetwork securityOnline securityPhishing attackPirrit adware removalransomware protectionrogue application cleanupsecure browsingsecurity breachspyware detectionsystem vulnerabilitythreat actor monetization strategiesthreat detectiontrojan virusunwanted pop-up mitigationvirus protectionzero-day exploit

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Scan Your System for Free

✅ Free Scan Available 

✅ 13M Scans/Month

✅ Instant Detection

Download SpyHunter 5
Download SpyHunter for Mac

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