Android Banking Trojans Spread via Fake Document Reader and KYC Apps
Researchers reported two Android banking malware campaigns using staged droppers to evade detection and steal financial data from mobile users. Zscaler ThreatLabz said a fake Document Reader app on Google Play was downloaded more than 10,000 times before removal and later fetched the Anatsa payload from a remote server, while CYFIRMA identified KYCShadow being distributed through fake KYC verification apps sent over WhatsApp to bank customers in India. In both cases, the initial apps appeared legitimate, then installed secondary malicious components designed to bypass early screening and analysis.
Once deployed, the malware sought high-risk permissions to hijack accounts, intercept SMS-based one-time passwords, and overlay banking apps to capture credentials. Anatsa was reported to target more than 831 financial institutions globally, including banks and cryptocurrency platforms, using obfuscation and anti-analysis techniques, while KYCShadow collected data such as mobile numbers, Aadhaar details, ATM PINs, and card information, then used Firebase Cloud Messaging and a full-tunnel VPN for command-and-control and traffic redirection. Researchers urged users to uninstall suspicious apps and avoid software delivered through messaging platforms, and advised defenders to monitor indicators including jsonapi[.]biz, jsonserv[.]biz, and jsonserv[.]xyz.
Timeline
Apr 28, 2026
Google removes malicious document reader app from Google Play
After researchers reported the threat, Google removed the fake document reader app from the Play Store. Zscaler ThreatLabz also published indicators of compromise including hashes, infrastructure details, and the malicious package name to help defenders identify infections.
Apr 28, 2026
Fake document reader on Google Play infects 10,000+ devices with Anatsa
A malicious document reader app on Google Play was downloaded more than 10,000 times and used a two-stage dropper to install the Anatsa Android banking trojan after passing initial review. Once deployed, Anatsa sought high-risk permissions to steal banking credentials, intercept SMS messages, and present fraudulent overlays targeting hundreds of financial institutions.
Apr 1, 2026
KYCShadow campaign targets Indian bank customers via fake KYC apps
In April 2026, researchers identified an Android banking malware campaign tracked as KYCShadow that distributed fake KYC verification apps through WhatsApp to target bank customers in India. The malware harvested personal and banking data, intercepted OTPs, and used Firebase messaging plus a VPN-based channel for command-and-control and traffic routing.
Jun 13, 2025
CYFIRMA publishes KYCShadow banking malware research
CYFIRMA published research on KYCShadow, an Android banking malware operation that abuses fake KYC verification apps to steal credentials and OTPs from bank customers in India. The report described its WhatsApp-based delivery, two-stage infection chain, and attacker infrastructure.
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