Russian malware communicates by leaving comments in Britney Spears's Instagram account

A key weakness in malicious software is the "Command and Control" (C&C) system: a central server that the malware-infected systems contact to receive updates and instructions, and to send stolen data. Anti-malware researchers like to reverse engineer malicious code, discover the C&C server's address, and then shut it down or blacklist it from corporate routers.

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