From Bitcoin Wiki
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Bitcoin malware is a kind of software which aims to break the defence of cryptocurrency wallets or steal your personal information including private keys.
- Infostealer.Coinbit - targets Windows machines, looks for wallet.dat. Probably the first Bitcoin-related virus.
MiItalic textning malware
- DevilRobber Trojan - targets Mac machines, mines Bitcoins, does a lot of other non-Bitcoin related malicious acts.
- BKDR_BTMINE.DDOS - targets Windows machines, launches DDoS attacks on miners.