fraud module Archives

AppWizard

September 17, 2025

224 Malicious Android Apps on Google Play With 38 Million Downloads Delivering Malicious Payloads

A mobile ad fraud operation called "SlopAds" infiltrated the Google Play Store with 224 malicious applications, which collectively achieved over 38 million downloads across 228 countries. The operation utilized advanced steganography and obfuscation techniques to deliver fraudulent advertising payloads while avoiding detection. SlopAds activated its fraud system selectively based on specific advertising campaigns, generating around 2.3 billion fraudulent bid requests daily, primarily from the United States (30%), India (10%), and Brazil (7%). The malicious apps exploited Firebase Remote Config to retrieve encrypted data for downloading a primary fraud module named "FatModule." This module was concealed within PNG image files, allowing it to bypass traditional security measures. The FatModule included anti-analysis features to evade detection by security researchers. Google has since removed all identified SlopAds applications from the Play Store and implemented protections through Google Play Protect.

AppWizard

September 17, 2025

38 Million Downloads Across 224 Malicious Android Apps on Google Play Deliver Harmful Payloads

Researchers from HUMAN’s Satori Threat Intelligence and Research Team discovered a digital advertising fraud operation called “SlopAds,” which involves 224 Android applications that have over 38 million downloads across 228 countries. SlopAds employs a multi-layered obfuscation strategy to deploy fraud modules that siphon ad revenue. The applications connect to Firebase Remote Config to retrieve an encrypted configuration that conceals URLs for PNG images containing fragments of an APK, which are reassembled to create the core fraud component known as FatModule. SlopAds generates approximately 2.3 billion bid requests daily, primarily targeting users in the United States (30%), India (10%), and Brazil (7%). Google Play Protect alerts users and blocks known SlopAds applications, and Google has removed these applications from the Play Store. Users who installed these apps from off-market sources remain vulnerable until they uninstall them.