Threats Tagged 'google tag manager abuse'
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Threats Tagged 'google tag manager abuse'
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A cybercriminal group dubbed GrelosGTM has been exploiting Google Tag Manager's legitimate functionality to compromise e-commerce websites. First detected in early April 2020, the group evolved their tactics by February 2021 to inject malicious Google Tag Manager scripts into targeted sites. The campaign affected at least seven websites running Magento CMS across Belgium, Italy, the United Kingdom, and the United States. Attackers inject custom Google Tag Manager scripts that load multi-stage JavaScript payloads through WebSocket connections. The final payload deploys a heavily obfuscated JavaScript sniffer designed to steal customers' payment card information during checkout using fake payment forms, with stolen data exfiltrated to attacker-controlled servers. Join the discussion | AlienVault OTX General | 09/15/2026, 08:15:42 UTC Added: 09/15/2026, 11:46:59 UTC |
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