OysterLoader Malware Loader Revealed with Rhysida Ransomware Connections

OysterLoader Malware Loader Revealed with Rhysida Ransomware Connections

First seen 13 Feb 2026, 10:10 UTC •GbhackersCybersecuritynewsCyberpressInfosecurity-MagazineScworld •84% similarity •45.2

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ThreatCluster

OysterLoader, a multi-stage malware loader, has been identified as a significant cybersecurity threat. First discovered in June 2024, this C++ malware employs advanced obfuscation techniques to avoid detection and is primarily distributed via counterfeit websites mimicking legitimate software applications. It has been linked to the Rhysida ransomware, further complicating the threat landscape.

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Timeline

2024-06-01
OysterLoader first identified by Rapid7
2026-02-13
OysterLoader's advanced obfuscation tactics reported

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Rhysida OysterLoader