GreedyBear
Intelligence Profile
GreedyBear is a sophisticated threat actor responsible for over $1 million in cryptocurrency theft through a campaign involving 150 malicious Firefox extensions, nearly 500 malicious executables, and numerous fraudulent websites. They employ techniques such as 'Extension Hollowing' to replace legitimate extensions with malicious versions that capture wallet credentials. The campaign is centralized, with most malicious domains resolving to a single IP address, and it has expanded to target other browsers while utilizing AI-generated code to enhance scalability and evade detection.
Threat Analysis
GreedyBear is a advanced-sophistication threat actor attributed to Russia, engaged in cyber operations with a primary motivation of espionage.
The group's espionage-oriented operations suggest a state-sponsored or state-aligned mandate, typically focused on stealing intellectual property, government secrets, or military intelligence. Targets are usually selected for strategic value rather than financial gain.
Classified as an advanced threat actor, GreedyBear likely develops or acquires zero-day exploits, employs custom malware toolchains, and demonstrates long-term persistence capabilities — hallmarks of a well-resourced operation consistent with nation-state backing.
Known Campaigns
GreedyBear is a espionage threat actor attributed to Russia. GreedyBear is a sophisticated threat actor responsible for over $1 million in cryptocurrency theft through a campaign involving 150 malicious Firefox extensions, nearly 500 malicious executables, and numerous fraudulent websites. They employ techniques such as 'Extension Hollowin...